Ratnam Steel

Aluminium Alloys

Nickel & High Temperature Alloys

Alloy & Stainless Steels

Non-Corrosion Resisting Alloy 7S1

Chemical Composition Limits
Weight%	C	Si	Mn	P+S	Pb by agreement	Limited Ruling Section
7S1 GpA	0.15-0.25	0.1-0.35	0.6-0.9	0.04 max	0.15-0.35	0-19mm
7S1 GpB	0.25-0.35	0.1-0.35	0.6-0.9	0.04 max	0.15-0.35	19-29 mm
7S1 GpC	0.3-0.4	0.1-0.35	0.6-0.9	0.04 max	0.15-0.35	29-101mm
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S	Others
SAE 1030 AISI 1030	0.28-0.34	0.15-0.3	0.6-0.9	P 0.04 S 0.05	-
SAE 1035 AISI 1035	0.32-0.38	0.15-0.3	0.6-0.9	P 0.04 S 0.05	-
SAE 1038 AISI 1038	0.35-0.42	0.15-0.3	0.6-0.9	P 0.04 S 0.05	-
MIL-S-16974 E1040	0.37-0.44	0.15-0.3	0.6-0.9	P 0.04 S 0.05	-

Typical Mechanical Properties

Grade	Tensile Strength (tonf/in)	0.2 % Yield Strength (tonf / in² )	Elongation on 5.65 √50	Ruling Section
7S1 GpA	35	29	7	3/4"
7S1 GpA	35	23	8	3/4" - 1.125"
7S1 GpC	35	19	11	1.125"-4"

Non-Corrosion Resisting Alloy 4S14

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Ni	Limited Ruling Section
4S14	0.10-0.15	0.10-0.35	0.40-0.70	0.040	0.30 max	13mm
4S14	0.10-0.18	0.10-0.35	0.60-1.00	0.040	0.30 max	13-19mm
Chemically similar British Specifications BS.970 Pt3
Weight%	C	Si	Mn	P+S max	Others
045M10 (EN32A)	0.07-0.13	0.10-0.40	0.30-0.50	0..050	-
060A15	0.13-0.18	0.40 max	0.50-0.70	0.050	-
080A15	0.13-0.18	0.40 max	0.70-0.90	0.050	-
080M15 (EN32C)	0.12-0.18	0.10-0.40	0.60-1.00	0.050	-
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Others
AFNOR CC10	0.05-0.15	0.30 max	0.30-0.60	0.040	-
AFNOR CC12	0.06-0.18	0.30 max	0.40-0.70	0.050	-
AISI 1012 / SAE 1012	0.10-0.15	0.10 max	0.30-0.60	P 0.040 S 0.050	-
AISI 1016 / SAE 1016	0.13-0.18	0.15-0.30	0.60-0.90	P 0.040 S 0.050	-
MIL-S-16974E-1	0.13-0.18	0.30 max	0.30-0.60	P 0.040 S 0.050	-
MIL-S-16974E-2	0.11-0.20	0.30 max	0.30-0.60	P 0.040 S 0.050	-
MSRR 6064	-	-	-	-	-
WS 1.1144	-	-	-	-	-
WS 1.0301	0.07-0.13	0.15-0.35	0.30-0.60	0.045	-
WS 1.0401	0.12-0.18	0.15-0.35	0.30-0.60	0.045	-

Typical Mechanical Properties

Grade	Tensile Strength (tonf/in)	Rp 0.2 Yield Strength (tonf / in² )	ElongationA% on 5.65 √50	Ruling Section
S14 HT	35	-	13	1/2" - 3/4"

Alloy Case Hardening Steel 5S15

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Ni
5S15	0.10-0.15	0.10-0.35	0.35-0.60	P 0.025 S 0.020	0.30 max	2.75-3.25
Chemically similar British Specifications BS.970 Pt4
Weight%	C	Si	Mn	P+S max	Cr	Ni
EN33	0.10-0.15	0.10-0.35	0.35-0.60	0.050 max	0.30 max	2.75-3.50
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Ni
MSRR 6004	-	-	-	-	-	-
WS 1.5637	0.12 max	0.10-0.35	0.30-0.60	0.035	-	3.20-3.80

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm (tonf/in²)	Elongation in 5.65 √Cross Sectional Area %	120D Impact FT. lbs	Ruling Section
S15	Hardened and Tempered	50	12	35	3/4"

Non-Corrosion Resisting Steel 5S21

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Ni
5S21	0.10-0.15	0.10-0.35	0.50-0.80	0.040 max	0.04 max
Chemically similar British Specifications BS.970 Pt1
Weight%	C	Si	Mn	P+S max	Cr
060A15	0.13-0.18	0.40 max	0.50-0.70	0.050 max	-
080A15	0.13-0.18	0.40 max	0.70-0.90	0.050 max	-
080M15 EN32C	0.12-0.18	0.10-0.40	0.60-1.00	0.050 max	-
EN3	0.25 max	0.05-0.35	1.00 max	0.060 max	-
EN3D	0.15-0.25	0.05-0.35	0.60-1.00	-	-
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr
AMS 5070	0.18-0.23	0.15-0.30	0.70-1.00	P 0.040 S 0.050	-
AFNOR XC18SN	0.15-0.22	0.25 max	0.40-0.65	P 0.040 S 0.035	-
AISI 1022	0.18-0.23	0.15-0.30	0.70-1.00	P 0.040 S 0.050	-
SIS 1450	0.25 max	0.10-0.40	0.40-0.80	0.050 max	-

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm (tonf/in²)	Elongation in 5.65 √Cross Sectional Area %	Ruling Section
S21	Normalised	25/35	20	6"
S21	Cold Drawn	28	12	6"

Non-Corrosion Resisting Steel 4 S28

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
4S28	0.26-0.34	0.10-0.35	0.45-0.70	P 0.025 S 0.020	1.10-1.40	0.20-0.35	3.90-4.30
Chemically similar British Specifications BS.970 Pt2
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
835M30	0.26-0.34	0.10-0.35	0.45-0.75	P 0.025-0.050 S 0.025-0.040	1.10-1.40	0.20-0.35	3.90-4.30
EN30B	0.26-0.34	0.10-0.35	0.40-0.60	-	-	0.20-0.40	3.90-4.30
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
AFNOR 30NCD16	0.25-0.35	0.10-0.40	0.20-0.55	P 0.030 S 0.025	1.20-1.50	0.40-0.60	3.70-4.30
AFNOR 35NCD16	0.03-0.37	0.10-0.40	0.30-0.60	P 0.030 S 0.025	1.60-2.00	0.30-0.50	3.70-4.20
WS 1.2766 NiCrMo16	0.32-0.38	0.15-0.30	0.40-0.60	0.035 max	1.20-1.50	0.20-0.40	3.80-4.30

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm (tonf/in²)	Proof Stress Rp 0.2, (tonf/in²)	Elongation in 5.65 √Cross Sectional Area %	Hardness HB	Ruling Section
S28	Solution Annealed	-	-	-	285 max	2 1/2"
S28	Hardened and Tempered	100	73	8	444	2 1/2"

Corrosion and Heat Resisting Alloy 3S61

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Ni
3S61	0.12 max	0.80 max	1.00 max	P 0.030 S 0.025	11.50-13.50	1.00 max
Chemically similar British Specifications BS.970 Pt4
Weight%	C	Si	Mn	P+S max	Cr	Ni
403S17	0.08 max	0.80 max	1.00 max	P 0.040 S 0.030	12.00-14.00	0.50 max
410S21 (EN56A)	0.08 max	0.08 max	1.00 max	P 0.040 S 0.030	11.50-13.50	1.00 max
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Ni	Other
AFNOR Z12C13	0.08-0.15	1.00 max	1.00 max	P 0.040 S 0.030	11.50-13.50	0.50 max	-
AISI 410 SAE 51410	0.15 max	1.00 max	1.00 max	P 0.040 S 0.030	11.50-13.50	-	-
AMS 5613	0.15 max	1.00 max	1.00 max	P 0.040 S 0.030	11.50-13.50	0.75 max	Al 0.05 max N 0.08 max
MIL-L-24128	0.06-0.13	0.50 max	0.25-0.80	0.030 max	11.50-13.00	0.50 max	Mo 0.60 max Al 0.05 max
MIL-S-862B 403	0.15 max	0.50 max	1.00 max	P 0.040 S 0.030	11.50-13.00	-	-
MIL-S-862B 410	0.15 max	1.00 max	1.00 max	P 0.040 S 0.030	11.50-13.50	-	-
WS 1.4006	0.08-0.12	1.00 max	1.00 max	P 0.040 S 0.030	12-14	-	-

Typical Mechanical Properties

Grade	Tensile Strength Rm (tonf/in²)	Proof Stress Rp 0.2, (tonf/in²)	Elongation in 5.65 √Cross Sectional Area %	Hardness HB
S61	35-45	23	20	152-207

Aircraft Stainless Steel BS 3S62 (MSRR 6602)

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Ni
3S62	0.18-0.25	0.80 max	1.00 max	P 0.030 S 0.025	12-14	1.00 max
Chemically similar British Specifications BS.970 Pt4
Weight%	C	Si	Mn	P+S max	Cr	Ni
420S37 (EN56C)	0.20-0.28	0.80 max	1.00 max	P 0.040 S 0.030	12-14	1.00 max
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Ni
AFNOR Z20C13	0.15-0.24	1.00 max	1.00 max	P 0.040 S 0.030	12-14	1.00 max
AISI 420 SAE 51420	0.20-0.28	0.80 max	1.00 max	P 0.040 S 0.030	12-14	1.00 max
MIL-S-862B 420	1.00 max	0.50 max	1.00 max	P 0.040 S 0.030	12-14	-
MSRR 6602	-	-	-	-	-	-
WS 1.4014	-	-	-	-	-	-
WS 1.4021	0.17-0.22	1.00 max	1.00 max	P 0.045 S 0.030	12-14	-

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm (tonf/in²)	Proof Stress Rp 0.2, (tonf/in²)	Elongation in 5.65 √Cross Sectional Area %	Hardness HB	Ruling Section
S62	HT	45-55	34	15	201-255	2 1/2"-6"
This material was Hardened and Tempered

Aircraft Stainless Steel BS S80 (MSRR 6573 / AMS 5628/ 431S29)

BS 7S80 is the British aerospace standard for 431 stainless steel. Designed to combine good corrosion resistance and high mechanical properties after heat treatment, it is used widely used in aerospace and defence applications. The grade is generally supplied in the hardened and tempered condition, designation S80D.

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Ni	Others (max)
4-S80 5-S80 6-S80 7- S80 Bar	0.12-0.20	1.00 max	1.00 max	P 0.030 S 0.025	15-18	2-3	Mo 0.3 / Co 0.05 / Cu 0.3/ Nb 0.05 / Sn 0.02 / Ti 0.05 / V 0.20 / W 0.05
Chemically similar British Specifications BS.970 Pt4 431 S29 (EN57)
Weight%	C	Si	Mn	P+S max	Cr	Ni	Others (max)
431S29 (EN57)	0.12-0.20	0.80 max	1.00 max	P 0.040 S 0.030	15-18	2-3	-
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Ni	Others (max)
AISI 431 SAE - 51431	0.20 max	1.00 max	1.00 max	P 0.040 S 0.030	15-17	1.25-2.5	-
AMS 5628D	0.12-0.17	0.20-0.60	0.30-0.80	P 0.040 S 0.030	15.50-17	2-3	Mo 0.50 / Cu 0.50 / N 0.10
MIL-S-86213 431	0.20 max	1.00 max	1.25 max	P 0.040 S 0.030	15-17	1.25-2.5	-
MIL-S-8967 (ASG)	0.13-0.17	0.20-0.60	0.30-0.80	0.025	15.50-16.50	2-3	Mo 0.25
MIL-S-187320	0.13-0.17	0.20-0.60	0.30-0.80	P 0.040 S 0.030	15.50-16.50	2-3	Mo 0.25 / N 0.10
MSRR 6573	-	-	-	-	-	-	-
Z15 CN17-03	-	-	-	-	-	-	-
BACM 85	-	-	-	-	-	-	-
WS 1.4044	-	-	-	-	-	-	-
WS 1.4057 XX22CrNi17	0.15-0.23	1.00 max	1.00 max	P 0.045 S 0.030	16-18	1.50-2.50	-
UNI X16CrNi16	0.10-0.20	1.00 max	1.00 max	P 0.040 S 0.030	15-17	1.50-2.5	-

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm N/mm²	Proof Stress Rp 0.2, N/mm²	Elongation A% √5.65 %	IZOD Impact FT/ Lbs	Hardness HB	Ruling Section	Product Range	Colour Code
6S80	HT	880/1080	690	12	25	255-321	2.5"	Round Square Flat Hexagon	Brown Black Red
7S80D	HT	-	-	-	15	-	2.5-4"	Round Square Flat Hexagon	Brown Black Red

Aircraft Steel BS 5 S82 (MSRR 6009)

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
4S82	0.12-0.18	0.15-0.04	0.25-0.55	P 0.025 S 0.020	1.00-1.40	0.020-0.030	3.80-4.30
5S82	0.14-0.18	0.15-0.04	0.25-0.55	P 0.025 S 0.020	1.00-1.40	0.020-0.030	3.80-4.30
Chemically similar British Specifications BS.970 Pt3
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
835A15	0.13-0.18	0.10-0.35	0.3-0.50	P 0.040 S 0.050	1.00-1.30	0.15-0.25	3.90-4.30
835M15	0.12-0.18	0.10-0.35	0.25-0.50	P 0.040 S 0.050	1.00-1.40	0.15-0.30	3.90-4.30
EN39B	0.12-0.18	0.10-0.35	0.30 max	-	1.00-1.40	0.15-0.35	3.80-4.50
EN39 835H15	0.12-0.18	0.10-0.35	0.25-0.50	P 0.040 S 0.050	1.00-1.40	0.15-0.30	3.90-4.30
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
AFNOR 16NCD17	0.12-0.18	0.50 max	0.50 max	P 0.030 S 0.025	1.00-1.40	0.15-0.45	4.00-4.50
AMS 6264	-	-	-	-	-	-	-
MSRR 6009/6055	-	-	-	-	-	-	-
WS 1.6723	0.12-0.18	0.15-0.40	0.25-0.55	P 0.030 S 0.025	1.00-1.40	0.20-0.30	3.80-4.30

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm N/mm²	Proof Stress Rp 0.2, N/mm²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB
S82	Solution Annealed	-	-	-	277 max
S82	Hardened and Tempered	1320-1520	1030	8	-

Non-Corrosion Resisting Steel 2S92

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Limited Ruling Section
2S92	0.18-0.26	0.10-0.35	1.30-1.70	P 0.040 S 0.045	0.25 max	0.10 max	0.40 max	<64mm
2S92	0.18-0.30	0.10-0.35	1.30-1.70	P 0.040 S 0.045	0.25 max	0.10 max	0.40 max	64-102mm
Chemically similar British Specifications BS.970 Pt3
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Others
150M19	0.15-0.23	-	1.30-1.70	0.050 max	-	-	-	-
EN14A	0.15-0.25	0.10-0.35	1.30-1.70	-	0.25 max	-	0.40 max	-
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Others
AISI 1024 SAE 1024	0.19-0.25	0.10-0.20	1.25-1.65	P 0.040 S 0.050	-	-	-	-
AISI 1027 SAE 1027	0.22-0.29	0.10-0.20	1.20-1.50	P 0.040 S 0.050	-	-	-	-
WS 1.5065	0.25-0.32	0.15-0.40	1.30-1.65	0.035 max	0.30 max	-	-	-

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm tonf/in²	Proof Stress Rp 0.2, tonf/in²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB
S92	Hardened and Tempered	40/55	35	15	179-255

Non-Corrosion Resisting Steel 2S93

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max
2S93	0.35-0.45	0.15-0.35	0.60-0.90	0.040 max
Chemically similar British Specifications BS.970 Pt1
Weight%	C	Si	Mn	P+S max
060A37	0.35-0.40	-	0.50-0.70	0.050 max
080M36	0.32-0.40	-	0.60-1.00	0.050 max
080A37 EN8B	0.35-0.40	-	0.70-0.90	0.050 max
080M40	0.36-0.44	-	0.60-1.00	0.050 max
2S113	0.35-0.45	0.10-0.35	0.60-0.90	0.040 max
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max
AFNOR CC45	0.40-0.50	0.10-0.40	0.50-0.80	0.040 max
AISI 1038 / SAE 1038	0.35-0.42	0.15-0.30	0.60-0.90	P 0.040 S 0.050
AISI 1040 / SAE 1040	0.37-0.44	0.15-0.30	0.60-0.90	P 0.040 S 0.050
AMS 5080E	0.31-0.38	0.15-0.30	0.60-0.90	P 0.040 S 0.050
MIL-S-1697E 1040-1	0.37-0.44	0.15-0.30	0.60-0.90	P 0.040 S 0.050
MIL-S-1697E 1040-2	0.34-0.45	0.15-0.30	0.60-0.90	P 0.040 S 0.050
WS 1.0503 C45	0.42-0.50	0.15-0.35	0.50-0.80	0.045 max

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm tonf/in²	Proof Stress Rp 0.2, tonf/in²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB	Ruling Section
2S93	Normalised	35-45	20	15	152-217	4"-6"
2S93	-	35-45	20	15	152-217	4"

Non-Corrosion Resisting Steel 2S97

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Al
2S97	0.27-0.35	0.15-0.35	0.45-0.70	P 0.025 S 0.020	0.50-0.80	0.45-0.65	2.30-2.80	0.015-0.050
Chemically similar British Specifications BS.970 Pt2
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
826M31	0.27-0.35	0.10-0.35	0.45-0.70	P 0.040 S 0.050	0.50-0.80	0.45-0.65	2.30-2.80
EN25	0.27-0.35	0.10-0.35	0.50-0.70	-	0.50-0.80	0.40-0.70	2.30-2.80
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
UNI 30NiCrMo12	0.27-0.35	0.40 max	0.50-0.80	0.035 max	0.60-1.00	0.30-0.60	2.63-3.20

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm tonf/in²	Proof Stress Rp 0.2, tonf/in²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB	Ruling Section
3S97	Solution Annealed	-	-	-	277 max	-
4S97	Hardened and Tempered	65-75	55	12	293-341	6"

Aircraft Steel BS S98 / 2S98D (826M40)

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Other	Al
2S98	0.36-0.44	0.10-0.35	0.45-0.70	P 0.025 S 0.020	0.50-0.80	0.45-0.65	2.30-2.80	-	0.015-0.050
Chemically similar British Specifications BS.970 Pt2
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Other
826M40	0.36-0.44	0.10-0.35	0.45-0.70	P 0.040 S 0.050	0.50-0.80	0.45-0.65	2.30-2.80	-
EN26	0.36-0.44	0.10-0.35	0.50-0.70	-	0.50-0.80	0.40-0.70	2.30-2.80	-
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Other
WS 1.6745	0.37-0.43	0.15-0.35	0.50-0.70	0.035	0.60-0.80	0.40-0.60	2.40-2.70	-

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm tonf/in²	Proof Stress Rp 0.2, tonf/in²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB	Ruling Section
3S98	Solution Annealed	-	-	-	277 max	-
2S98D	Hardened and Tempered	75-85	65	10	341-388	6"

Aircraft Steel BS S99/ 5S99D / 5S99G (826M40)

BS S99, along with S98 is the British aerospace equivalent of 826M40. A 2 1/2% Nickel-Chrome-Moly high carbon steel, it is available in bars and forgings. S98 is generally supplied as bright bar in either the softened condition (5S99D) or hardened and tempered (5S99G).

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Other	Al
S99	0.36-0.44	0.10-0.35	0.45-0.70	P 0.025 S 0.020	0.50-0.80	0.45-0.65	2.30-2.80	-	0.015-0.050
Chemically similar British Specifications BS.970 Pt2
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Other
826M40	0.36-0.44	0.10-0.35	0.45-0.70	P 0.040 S 0.050	0.50-0.80	0.45-0.65	2.30-2.80	-
EN26	0.34-0.44	0.10-0.35	0.50-0.70	-	0.50-0.80	0.40-0.70	2.30-2.80	-
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Other
WS 1.6745 40NiMoCr105	0.37-0.43	0.15-0.35	0.50-0.70	0.035 max	0.60-0.80	0.40-0.60	2.4-2.7	-

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm N/mm²	Proof Stress Rp 0.2, N/mm²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB	Ruling Section
3S99D	Solution Annealed	-	-	-	277 max	-
3S99G	Hardened and Tempered	1230-1420	1080	10	363-415	6"

Aircraft Steel BS S106 / 4S106D (MSRR 6001)

BS s106 is the British aerospace equivalent of 722M24 / EN40B. It is a medium strength 3% Chrome-Moly nitriding steel that develops high hardness after heat treatment, and is used in both aerospace applications and motorsports industries. It is generally supplied as bright bar in the hardened, tempered and stress relieved condition, designated S106D. It can also be supplied to the Rolls Royce specification MSRR 6001.

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Sn
3S106	0.20-0.28	0.10-0.35	0.40-0.70	0.020	3.00-3.50	0.45-0.65	0.30 max	0.030 max
4S106	0.20-0.28	0.10-0.35	0.40-0.70	0.020	3.00-3.50	0.50-0.70	0.30 max	0.030 max
Chemically similar British Specifications BS.970 Pt2
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	-
722M24	0.20-0.28	0.10-0.35	0.45-0.70	0.025	3.00-3.50	0.45-0.65	-	-
EN40B	0.20-0.30	0.10-0.35	0.40-0.65	0.050	2.90-3.50	0.40-0.70	0.40 max	-
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Sn
WS 1.7365	0.25-0.30	0.15-0.25	0.60-0.80	0.035 max	3.00-3.30	0.45-0.550	-	-

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm N/mm²	Proof Stress Rp 0.2, N/mm²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB	Ruling Section
S106	Solution Annealed	-	-	-	269 max	-
S106D	Hardened and Tempered	930/1080	740	35	269/321	6"

Non-Corrosion Resisting Steel 2S120

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
2S120	0.27-0.35	0.15-0.35	0.45-0.65	P 0.025 S 0.020	0.50-0.80	0.45-0.65	2.30-2.80
Other Chemically similar British Specifications
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
826M31	0.27-0.35	0.10-0.35	0.45-0.70	P 0.040 S 0.050	0.50-0.80	0.45-0.65	2.30-2.80
EN25	0.27-0.35	0.10-0.35	0.45-0.70	-	0.50-0.80	0.40-0.70	2.30-2.80

Non-Corrosion Resisting Steel 2S124

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Zr	Other
S124	0.15/0.25	1.00 max	1.50 max	P 0.45 S 0.15 - 0.40	12-14	0.60 max	1.00 max	0.60 max	Mo + Zr 1.0

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm tonf/in²	Proof Stress Rp 0.2, tonf/in²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB
S124	Hardened and Tempered	45 / 55	29	11	201 / 255

Non-Corrosion Resisting Steel S126

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Ni	Nb
S126	0.15 max	0.20-1.0	0.50-2.0	P 0.035 S0.025	22.0-0.025	13-16	8 X C Min

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm tonf/in²	Proof Stress Rp 0.2, tonf/in²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB	Ruling Section
S126	Solution Treated	35	14	28	-	6"

Non-Corrosion Resisting Alloy S129

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Others
S129	0.12	0.20-1.00	0.50-2.00	P 0.035 S 0.025	17-19	-	8-11	Ti 5X C min
2S129	0.08 max	0.20-1.00	0.50-2.00	P 0.035 S 0.025	17-19	1.0 max	8-11	Ti 5X C 0.80
Chemical similar British Specifications BS 970 Pt4
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Others
321S20 321S12 (EN58 b/c)
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Others
AFNOR Z10 CNT 18-11 Z6 CNT 18-11	0.12 max	1.00 max	2.00 max	P 0.040 S 0.030	17-19	-	10-12	Ti 5 X C 0.80
AISI 321 / SAE 30321	0.80 max	1.00 max	2.00 max	P 0.045 S 0.030	17-19	-	9-12	Ti 5 X C min
AMS 5645	0.80 max	1.00 max	2.00 max	P 0.040 S 0.030	17-19	0.75 max	0.80-12.00	Ti 6 X C/ min
MIL-S- 862B 321	0.80 max	1.00 max	2.00 max	P 0.045 S 0.030	17-19	-	9-12	Ti 5 X C
MIL-S-27419 321	0.80 max	1.00 max	2.00 max	0.025	17-20	-	9-13	Ti 0.75 max Cu 0.70 max
WS 1.4541 X10CrNiTi18 9	1.00 max	1.00 max	2.00 max	P 0.045 S 0.030	17-19	-	9-11.50	Ti 5 X C min

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm N/mm²	Proof Stress Rp 0.2, N/mm²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB	Ruling Section
S129	Solution Treated	540	210	35	Black 183 Bright 255	6"

Aircraft Stainless Steel BS S130/ 2S130D (MSRR 6522)

BS S130 is the British aerospace equivalent of stainless steel grade 347, and is often dual-certified to the US aerospace specifcation AMS 5646 and the Rolls Royce specification MSRR 6522. It is generally supplied as bright bar in the finally heat treated and cold drawn/ground condition, designated S130D.

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Ni	Nb	Others
S130 Bar	0.08 max	0.20-1.00	0.50-2.00	P0.035 S 0.025	17-19	8-11	10 X C / 1.1 max	Mo 1.0 max
2S130 Bar	0.08 max	0.20-1.00	0.50-2.00	P 0.035 S 0.025	17-19	8-11	10 X C / 1.1 max	Mo 1.0 max
Chemical similar British Specifications BS 970 Pt4
Weight%	C	Si	Mn	P+S max	Cr	Ni	Nb	Others
347-S17 (EN58F/G)	0.08 max	0.20-1.00	0.50-2.00	P 0.035 S 0.030	17-19	9-12	10 X C 1.00	-
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Others
AFNOR Z26 CNNb 18-11	0.08 max	1.00 max	2.00 max	P 0.040 S 0.030	17-19	10-12	Nb + Ta 10 X C / 1.00	-
AISI 347/SAE 30347	0.08 max	1.00 max	2.00 max	P 0.045 S 0.030	17-19	9-13	Nb + Ta> 10 X C	-
AMS 5646	0.80 max	1.00 max	2.00 max	P 0.040 S 0.030	17-19	9-12	Nb +Ta 10XC /1.00	Mo 0.75 max Cu 0.50 max
MIL-S-862B 347	0.80 max	1.00 max	2.00 max	P 0.045 S 0.030	17-19	9-13	Nb+Ta 10 X C	-
MIL -S-27419 347	0.80 max	1.00 max	2.00 max	0.025	17-20	9-13	Nb 1.10 max	Cu 0.70
WS 1.4550 XCrNiNb 18 9	0.10 max	1.00 max	2.00 max	P 0.045 S 0.030	17-19	9-11.50	Nb 8C min	-

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm N/mm²	Proof Stress Rp 0.2, N/mm²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB	Ruling Section
S130	Finally Heat Treated	540	210	35	Black 183 Bright 255	6"

Aircraft Steel BS S132 / 3S132D

BS S132 is a 3% chrome-moly-vanadium steel suitable for nitriding. It offers high strength and hard wear resistance after surface treatment, making it widely used in gearbox shafts and crankshafts. It is supplied in as bright bar in the softened and cold drawn/ground condition, designated S132D.

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Other
3S132	0.35-0.43	0.10-0.35	0.40-0.70	P 0.020 S 0.020	3.0-3.5	0.80-1.10	0.30 max	V 0.15 - 0.25 Sn 0.030

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm N/mm²	Proof Stress Rp 0.2, N/mm²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB	Ruling Section
S132	Solution Annealed	-	-	-	277 max	-
S132	Hardened and Tempered	1320-1470	1130	8	388-429	2 3/4"

Non-Corrosion Resisting Steel S134

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Other
S134	0.35-0.43	0.10-0.35	0.45-0.70	P 0.025 S 0.020	3.0-3.5	0.80-1.10	0.40 max	V 0.15-0.25

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm , tonf/in²	Proof Stress Rp 0.2, tonf/in²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB	Ruling Section
S134	Solution Annealed	-	-	-	277 max
S134	Hardened and Tempered	100	79	8	444	1 1/8"

Non-Corrosion Resisting Steel 2S135

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	V	Other
S135	0.90-1.10	0.15-0.40	0.25-0.55	P 0.030 S 0.025	1.30-1.60	0.10 max	0.40 max	0.30 max	Cu 0.25 max

Typical Mechanical Properties

Grade	Treatment	Hardness HB	Ruling Section
S135	Solution Annealed	207 max	1"
S135	Hardened and Tempered	770 ( Transverse Test)	1"

Non-Corrosion Resisting Steel 2S140

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Al	Other
S140	0.27-0.35	0.15-0.35	0.45-0.70	P 0.025 S 0.020	0.50-0.80	0.45-0.65	2.30-2.80	0.015-0.050	-
2S140	0.27-0.35	0.15-0.35	0.45-0.70	P 0.025 S 0.020	0.50-0.80	0.45-0.65	2.30-2.80	0.015-0.050	-
Chemically similar British Specifications BS.970 Pt2
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Other
817Mo	0.36-0.44	0.10-0.35	0.45-0.70	P 0.040 S 0.050	1.00-1.40	0.20-0.35	1.30-1.70	-
EN24	0.35-0.45	0.10-0.35	0.45-0.70	-	0.90-1.40	0.20-0.35	1.30-1.80	-
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Other
UNI 30NiCrMo12	0.27-0.35	0.40 max	0.50-0.80	0.035	0.60-1.00	0.30-0.60	2.60-3.20	-

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm , N/mm²	Proof Stress Rp 0.2, N/mm²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB	Ruling Section
S140	Solution Annealed	-	-	-	248 max
S140	Hardened and Tempered	1080-1280	880	10	311-388	6"

Corrosion Resisting Alloy S141

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Ni	Other
S141	0.08-0.14	0.08 max	1.0 max	P 0.030 S0.025	12-14	1.0	-
Chemically similar British Specifications BS.970 Pt4
Weight%	C	Si	Mn	P+S max	Cr	Ni	Other
410S21 EN56A	0.090-0.15	0.08 max	0.10 max	P 0.040 S 0.030	11.50-13.50	1.00 max	-
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Ni	Other
AFNOR Z10C13	0.12 max	1.00 max	1.00 max	P 0.040 S 0.030	12-14	-	-
AFNOR Z12C13	0.08-0.15	1.00 max	1.00 max	P 0.040 S 0.030	11.50-13.50	0.50 max	-
AISI 410 SAE 51410	0.15 max	1.00 max	1.00 max	P 0.040 S 0.030	11.50-13.50	-	-
AMS 5613	0.15 max	1.00 max	1.00 max	P 0.040 S 0.030	11.50-13.50	0.75	Mo 0.50 max Al 0.05 max N 0.08 max Cu 0.50 max Sn 0.05 max
MIL-S-862B 403	0.15 max	0.50 max	1.00 max	P 0.040 S 0.030	11.50-13.00	-	-
MIL-L 24128	0.06-0.13	0.50 max	0.25-0.80	0.030	11.50-13.00	0.50 max	Mo 0.60 max Al 0.05 max Cu 0.50 max Sn 0.05 max
WS 1.4006 X10Cr13	0.08-0.12	1.00 max	1.00 max	P 0.045 S 0.030	12-14	-	-

Non-Corrosion Resisting Alloy 2S142

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
S142	0.22-0.029	0.15-0.35	0.50-0.80	P 0.020 S0.015	0.90-1.20	0.15-0.25	0.30 max
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Ni	Other
AFNOR 25CD4	0.22-0.28	0.10-0.40	0.60-0.90	P 0.035 S 0.035	0.85-1.15	0.15-0.30	-
WS 1.7218 25CrMo4	0.22-0.29	0.15-0.40	0.50-0.80	P 0.035 S 0.035	0.90-1.20	0.15-0.30	-

Aircraft Stainless Steel BS S143 / 2S143 (FV 520)

S143 is a British aerospace grade, precipitation hardenable stainless steel which combines high mechanical strength with moderate corrosion resistance. It is widely used for mechanical components in aerospace and defense applications as well as other high-tech mechanical applications. It is chemically identical to BS S144 and BS S145 and is supplied as bright bar in the finally heat treated condition, designated BS S143D. The heat treatment is as follows:

Solution Treatment : 1050°C plus air cool
Precipitation Treatment (1st Stage): 750 °C / 2hrs plus air cool
Precipitation Treatment (Final Stage): 550 °C / 2hrs plus air cool

Chemical Composition Limits
Weight%	C	Si	Mn	P + S max	Cr	Cu	Mo	Nb	Ni
S143	0.07	0.6	1.0	P 0.035 S 0.025	13.2-14.7	1.20-2.0	1.20-2.0	0.10-0.40	5.0-5.80

Typical Mechanical Properties

Grade	Condition	Tensile Strength N/mm²	Yield Strength N/mm²	Elongation (%)	Hardness	Ruling Section
S143	Finally Heat Treated	930-1080	780	15	277-341	-
S143	Finally Heat Treated Softened	930-1080	780	12 transverse test piece	277-341 331 max	-
S143	Softened				331 max	-

Aircraft Stainless Steel BS S144 / 3S144 (FV 520)

S144 is a British aerospace grade, precipitation hardenable stainless steel which combines high mechanical strength with moderate corrosion resistance. It is widely used for mechanical components in aerospace and defense applications as well as other high-tech mechanical applications. It is chemically identical to BS S143 and BS S145 and is supplied as bright bar, usually in one of two heat treatments: Solution Treated and Primary Hardened, designated S144D, or Solution Treated, Primary Hardened and Precipitated, designated S144H. The heat treatment is as follows:

Solution Treatment : 1000-1050°C plus air cool
Precipitation Harden: 750-850 °C / 2hrs plus air cool (S144D)
Precipitation : 440-460 °C / 2hrs plus air cool (S144H)

Chemical Composition Limits
Weight%	C	Si	Mn	P + S max	Cr	Cu	Mo	Nb	Ni
S144	0.07	0.6	1.0	P 0.035 S 0.025	13.2-14.7	1.20-2.0	1.20-2.0	0.10-0.40	5.0-5.80

Typical Mechanical Properties

Grade	Condition	Tensile Strength N/mm²	Yield Strength N/mm²	Elongation (%)	Hardness (HB)	Ruling Section
S144	Primary Hardened S144D	-	-	-	341 max	-
S144	Sol Trd, Primary Hd, plus Precipitate S144H	1130-1330	1030	12	352-401	-

Aircraft Stainless Steel BS S145 / 3S145 (FV 520)

S145 is a British aerospace grade, precipitation hardenable stainless steel which combines high mechanical strength with moderate corrosion resistance. It is widely used for mechanical components in aerospace and defense applications as well as other high-tech mechanical applications. It is chemically identical to BS S143 and BS S145 and is supplied as bright bar, usually in one of two heat treatments: Solution Treated, designated S145D, or Solution Treatedand Precipitated, designated S145H. The heat treatment is as follows:

Solution Treatment : 850-950°C/1hr plus air cool (S145D)
Precipitation: 440-460°C / 30mins plus air cool (S145D)

Typical Mechanical Properties

Non-Corrosion Resisting Steel S150

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Nb	Other
S150	0.08-0.16	0.15-0.60	0.30-1.20	P 0.030 S 0.025	9.80-11.20	0.40-0.80	0.60-1.20	0.15-0.45	V0.10-0.25

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm , N/mm²	Proof Stress Rp 0.2, N/mm²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB
S150	Solution Annealed	-	-	-	277 max
S150	Hardened and Tempered	930-1080	780	10	285-331

Aircraft Stainless Steel S151 / S151D (Jethete M152 / MSRR 6503)

BS S151 is the British aerospace standard for stainless steel alloy Jethete M152. S151 is a creep and corrosion resistant, hardened and tempered steel with a usual upper temperature limit of 560°C. It combines very good toughness and creep rupture properties making it an excellent alloy for use in highly stressed turbine blades, discs, screws, bolts and rings. S151 is usually supplied in the finally heat treated condition, although is available softened at larger diameter, and has a limiting ruling section of 150mm (6"). It can also be supplied dual certified to MSRR 6503.

The heat treatment for BS S151 is as follows:

Softening: 670-720°C for 6 hours followed by air cool - Designated BS S151A
Harden: 1050°C (+/-10) followed by air cool
Temper: 650°C (+/-5) followed by air cool - Designated BS S151D

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	N	V
S151	0.08-0.13	0.35 max	0.50-0.90	P 0.030 S 0.025	11-12.5	1.50-2.0	2-3	0.02-0.04	0.25-0.40

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm , N/mm²	Proof Stress Rp 0.2, N/mm²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB	Ruling Section
S151A	Solution Annealed	-	-	-	311 max
S151D	Hardened and Tempered	930-1130	780	14	286-311	6"

Aircraft Steel BS S154 / S154D (MSRR 6043)

BS S154 is a 2.5% Nickel-chrome-moly steel, and the British aerospace equivalent ot 826M31 (EN25). It is generally supplied as bright bar in the finally heat treated and cold drawn/groun condition, designated S154D.

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Al
2S96	0.27-0.35	0.10-0.35	0.45-0.70	P 0.025 S 0.020	0.50-0.80	0.45-0.65	2.30-2.80
S154	0.27-0.35	0.15-0.35	0.45-0.70	P 0.025 S 0.020	0.50-0.80	0.45-0.65	2.30-2.80	0.015-0.050
Chemically similar British Specifications BS.970 Pt2
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
826M31	0.27-0.35	0.10-0.35	0.45-0.70	P 0.040 S 0.050	0.50-0.80	0.45-0.65	2.30-2.80
EN25	0.27-0.35	0.10-0.35	0.50-0.70	-	0.50-0.80	0.40-0.65	2.30-2.80
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
UNI 30NiCrMo12	0.27-0.35	0.40 max	0.50-0.80	0.035	0.60-1.00	0.30-0.60	2.60-3.20

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm , N/mm²	Proof Stress Rp 0.2, N/mm²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB	Ruling Section
S154D	Solution Annealed	-	-	-	248 max
S154D	Hardened and Tempered	880-1080	690	12	255-321	6"

Hardenable Steel BS S155

BS S155 is the British aerospace equivalent of U.S. steel grade 300M (4340M / AMS 6257). It is a vacuum melted grade supplied in the normalised and tempered/softened condition to allow for final heat treatment. It has a combination of ultra high strength, good fatigue resistance and excellent transverse properties and as such finds many applications in the aerospace industry such as undercarriage components, gears and shafts.

Chemical Composition Limits
Weight%	C	Si	Mn	P + S max	Cr	Mo	Ni
S155	0.39-0.44	1.50-1.80	0.60-0.90	P 0.015 S 0.01	1.60-2.00	0.40-0.60	3.50-4.50

Typical Mechanical Properties

Grade	Condition	Tensile Strength N/mm²	Yield Strength N/mm²	Elongation (%)	Hardness (HB)	Ruling Section
S155	Norm & Softened	-	-	-	302	-
S155	Hardened & Tempered	1900-2100	1550	8	534-601	3"
S155	Hardened & Tempered	1900-2100	1550	5 (Transverse test)	534-601	3"

Non-Corrosion Resisting Steel S157 / 3S107

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
S157	0.12-0.17	0.15-0.40	0.30-0.60	P 0.025 S 0.020	0.80-1.10	0.20-0.30	3.00-3.50
Chemically similar British Specifications BS.970 Pt3
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
832H13 832M13	0.10-0.16	0.10-0.35	0.35-0.60	P 0.040 S 0.050	0.70-1.00	0.10-0.25	3.00-3.75
EN36A	0.12-0.18	0.10-0.35	0.30-0.60	0.050	0.60-1.10	0.10-0.025	3.00-3.75
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
AFNOR 16NCD13	0.12-0.17	0.35 max	0.50 max	P 0.030 S 0.025	0.85-1.15	0.15-0.30	3.00 - 3.5
WS 1.6657 14NiCrMo 13 4	0.12-0.17	0.15-0.40	0.30-0.60	P 0.030 S 0.025	0.80-1.10	0.20-0.30	3.00 - 3.5

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm , N/mm²	Proof Stress Rp 0.2, N/mm²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB
S157	Hardened and Tempered	1180-1380	930	8	241 max

Aircraft Stainless Steel S159 / S159D (Jethete M152)

BS S159 is the British aerospace standard for stainless steel alloy Jethete M152. S159 is a creep and corrosion resistant, hardened and tempered steel with a usual upper temperature limit of 560°C. It combines very good toughness and creep rupture properties making it an excellent alloy for use in highly stressed turbine blades, discs, screws, bolts and rings. S159 is usually supplied in the finally heat treated condition, although is available softened at larger diameter, and has a limiting ruling section of 50mm (2").

The heat treatment for BS S191 is as follows:

Softening: 680-700°C for 2 hours min followed by air cool - Designated BS S159A
Harden: 1050°C (+/-10) for 30 minutes min followed by air cool
Temper: 560-590°C for 3 hours min followed by air cool - Designated BS S159D
Stress Relieve: Can be performed on hardened and tempered bars if a cold rolling operation has taken place, by holding at 30°C lower than the tempering temperature.

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	N	V
S159	0.08-0.13	0.35 max	0.50-0.90	P 0.030 S 0.025	11-12.5	1.50-2.0	2-3	0.02-0.04	0.25-0.40

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Mpa	Yield Strength Mpa	Elongation %	Hardness HB	Ruling Section
S159A	Solution	-	-	-	311 max	-
S159D	Finally Heat Treated	1100-1300	900	8	321-388	50mm

Maraging Steel BS S162 (DTD 5212 / AMS 6512)

Alloy 250 (UNS K92890 / Maraging 250/ DTD 5212) is an age-hardenable iron-nickel steel. Alloy 250 (DTD 5212) combines ultra-high strength (1800MPa), good toughness, readily machinable in pre-aged condition, excellent transverse properties and resistance to crack propagation. Maraging 250 is used for missile and ejector systems, slat tracks and drive shafts.

Chemical Composition Limits
Weight%	C	Si	Mn	P + S max	Cr	Mo	Ni	Ti	Co	Al
DTD 5212	0.015 max	0.10 max	0.10 max	P 0.01 S 0.01	0.25 max	4.6-5.2	17-19	0.3-0.6	7-8.5	0.05-0.15
BS S162	0.015 max	0.10 max	0.10 max	P 0.01 S 0.01	0.25 max	4.6-5.2	17-19	0.3-0.6	7-8.5	0.05-0.15
BS S162 is the aerospace equivalent of maraging 250

Typical Mechanical Properties

Grade	Direction	Yield Strength (0.2% Offset)		Tensile Strength		Elongation (%)
Grade	Direction	hbar	tonfin²	hbar	tonfin²	Elongation (%)
DTD 5212	Longitudinal	170 min	110 min	180 min 200 max	116 min 130 max	8 min
DTD 5212	Transverse	170 min	110 min	180 min 200 max	116 min 130 max	5 min

Grade	Condition	Tensile Strength N/mm²	Yield Strength N/mm²	Elongation (%)	Hardness
S162	Solution Treated	-	-	-	321 max
S162	Solution Treated + Aged (Long)	1800-2000	1700	8	520-620 HV
S162	Solution Treated + Aged (Transverse)	1800-2000	1700	5	520-620 HV

Non-Corrosion Resisting Steel S510

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Ni	Other
S510	0.17-0.25	0.10-0.35	0.50-0.80	P 0.050 S 0.050	0.30	Cr 0.25 Mo 0.10
Chemically similar British Specifications BS.970 Pt1
Weight%	C	Si	Mn	P+S max	Ni
060A20	0.18-0.23	-	0.30-0.60	P 0.050 S 0.050	-
EN36A EN3C	0.16-0.24	-	0.50-0.90	P 0.050 S 0.050	-
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Ni
AFNOR XC18	0.16-0.22	0.25 max	0.40-0.65	P 0.035 S 0.035	-
WS 1.0619	0.18-0.23	0.30-0.50	0.50-0.80	P 0.045 S 0.045	-
SAE 1020	0.18-0.23	0.15-0.30	0.30-0.60	P 0.040 S 0.050	-

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm , N/mm²	Proof Stress Rp 0.2, N/mm²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB	Size
S510 Sheet	Solution Annealed	430-540	255	18	121-163	<1.6mm
S510 Sheet	Solution Annealed	430-540	255	20	121-163	>1.6mm

Carbon Steel S511

BS S511 is a heat treatable carbon steel that is mainly used in low strength applications where significant drawing is required during the stockiest process.

Chemical Composition Limits
Weight%	C	Si	Mn	P + S max	Cr	Mo	Ni
S511	0.1 max	0.2 max	0.5 max	P 0.04 S 0.04	0.15 max	0.1 max	0.3 max

Typical Mechanical Properties

Grade	Condition	Tensile Strength N/mm²	Yield Strength N/mm²	Elongation (%)	Hardness (HB)	Ruling Section
S511	Softened	280-400	-	26		<1.6mm
S511	Softened	280-400	-	28	121 max	1.6mm-2.4mm
S511	Softened	280-400	-	30		>2.4 mm

Non-Corrosion Resisting Steel S514 / S515

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
S514 / S515	0.17-0.25	0.10-0.35	1.30-1.70	0.040 amx	0.25 max	0.10 max	0.40 max
Chemically similar British Specifications BS.970 Pt1
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
EN14A EN14B 150M19	0.15-0.23	-	1.30-1.70	0.050 max	-	-	-

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm , N/mm²	Proof Stress Rp 0.2, N/mm²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB	Size
S514	Hardened and Tempered	770-1000	630	8	229-302	<1.6mm
S514	Hardened and Tempered	770-1000	630	10	229-302	1.6-2.4 mm
S514	Hardened and Tempered	770-1000	630	12	229-302	>2.4mm
S515	Softened	-	-	-	179 max	>2.4mm

Non-Corrosion Resisting Steel S516

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Other
S516	0.42-0.50	0.10-0.35	1.30-1.70	0.040	-
Chemically similar British Specifications BS.970 Pt1
Weight%	C	Si	Mn	P+S max	Other
WS 1.0912	0.42-0.50	0.15-0.38	1.60-1.90	0.050	-

Non-Corrosion Resisting Steel S518 (Withdrawn 1956, Replaced by S534:1969)

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Other
S518	0.26 max	0.10-0.35	0.40-0.80	0.045	0.80-1.20	0.15-0.25	0.50 max	-

Non-Corrosion Resisting Steel S524

Chemical Composition Limits
Weight%	C	Si	Mn	Cr	Mo	P + S max	Ni	Ti
S524	0.08	0.20-1.00	0.50-2.00	17-19	1.0	P 0.035 S 0.025	0.20	5XC / 0.7

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm , N/mm²	Yield Strength, N/mm²	Elongation %	Ruling Section
S524	Cold Rolled	800-1100	640	11	<1.5mm
S524	Cold Rolled	800-1100	640	13	1.5 mm- 3.0mm
S524	Cold Rolled	800-1100	640	15	>3.00 mm

Aircraft Stainless Steel BS S526 (AMS 5689)

BS S526 is the British aerospace standard for stainless steel 321, and is often supplied dual-certified to the U.S. aerospace specification AMS 5510. It is supplied in the annealed condition to allow good cold workability and is suitable for low strength components requiring good corrosion resistance and weldability.

Chemical Composition Limits
Weight%	C	Si	Mn	Cr	Mo	P + S max	Ni
S526	0.08	0.20-1.00	0.50-2.00	17-19	1.0	P 0.035 S 0.025	9.0-11.0

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm , N/mm²	Yield Strength, N/mm²	Elongation %	Ruling Section
S526	Softened	540	210	30	<1.5mm
S526	Softened	540	210	35	1.5-3.0mm
S526	Softened	540	210	40	> 3.0 mm

Aircraft Stainless Steel BS S527 (AMS 5512)

BS S527 is the British aerospace standard for stainless steel 347, and is often supplied dual-certified to the U.S. aerospace specification AMS 5512. It is supplied in the annealed condition to allow good cold workability and is suitable for low strength components requiring good corrosion resistance and weldability.

Chemical Composition Limits
Weight%	C	Si	Mn	P + S max	Cr	Mo	Ni	Nb
S527	0.08 max	0.20-1.0	0.50-2.0	P 0.035 S 0.025	17-19	1.0 max	9-11	10 X C / 1.0

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm , N/mm²	Proof Strength Rp 0.2, N/mm²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB	Size
S527	Softened	540	210	30	179 max	<1.5mm
S527	Softened	540	210	35	179 max	1.5-3.0 mm
S527	Softened	540	210	40	179 max	> 3.0 mm

Alloy Steel S534

BS S534 is an alloy steel, similar to U.S. specification 4130 (AMS 6350). It is supplied in sheet form in the softened condition, usually dual certified to BS S535 for subsequent heat treatment, depending on the properties required. Heat treatment is as follows:

S534 Harden 870°C + Oil quench / Temper 540°C (2hrs) + air cool
S535 Harden 870°C + Oil quench / Temper 420°C (2hrs) + air cool

Chemical Composition Limits
Weight%	C	Si	Mn	P + S max	Cr	Mo	Ni
S534	0.22-0.29	0.15-0.35	0.50-0.80	P 0.02 S 0.025	0.90-1.20	0.15-0.25	0.3

Typical Mechanical Properties

Grade	Condition	Tensile Strength N/mm²	Yield Strength N/mm²	Elongation (%)	Hardness (HB)	Ruling Section
S534	Hardened & Tempered	880-1180	690	8	255-321	<1.5mm
S534	Hardened & Tempered	880-1180	690	9		1.5mm-3.0mm
S534	Hardened & Tempered	880-1180	690	10		>3.0mm
S534	Softened				174 max

Aircraft Steel BS S535

BS S535 is an alloy steel, similar to U.S. specification 4130 (AMS 6350). It is supplied in sheet form in the softened condition, usually dual certified to BS S534 for subsequent heat treatment, depending on the properties required. Heat treatment is as follows:

S534 Harden 870°C + Oil quench / Temper 540°C (2hrs) + air cool
S535 Harden 870°C + Oil quench / Temper 420°C (2hrs) + air cool

Chemical Composition Limits
Weight%	C	Si	Mn	P + S max	Cr	Mo	Ni
S535	0.22-0.29	0.15-0.35	0.50-0.80	P 0.02 S 0.025	0.90-1.20	0.15-0.25	0.3

Typical Mechanical Properties

Grade	Condition	Tensile Strength N/mm²	Yield Strength N/mm²	Elongation (%)	Hardness (HB)	Ruling Section
S535	Hardened & Tempered	1150-1300	1000	4	341-388	<1.5mm
S535	Hardened & Tempered	1150-1300	1000	5		1.5mm - 3.0mm
S535	Hardened & Tempered	1150-1300	1000	6		>3.0mm
S535	Softened				174 max

Aircraft Carbon Steel BS T45/ 4T45 Tube

BS T45 is a carbon-manganese steel tube supplied in the hardened and tempered condition. It finds many different applications in both the motorsport and aerospace industries due to its high strength to weight ration. T45 is also weldable, but unlike other chome-moly tube grades does not require heat treating after welding.

Chemical Composition Limits
Weight%	C	Si	Mn	Cr	Ni	Mo	P + S max
4 T45 Tube	0.17-0.25	0.10-0.35	1.30-1.70	0.25 max	0.40 max	0.10	0.040 max

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm , N/mm²	Proof Strength Rp 0.2, N/mm²	Hardness HB	Ruling Section
T45 Tube	Hardened and Tempered	700-900	620	201-262 max	12.5 mm minimum O.D

Chrome Molybdenum Steel Tube T60

Chemical Composition Limits
Weight%	C	Si	Mn	Cr	Ni	Mo	P + S max
3 T60 Tube	0.22-0.29	0.15-0.35	0.50-0.80	0.90-1.20	0.30 max	0.15-0.25	P 0.020 S 0.015

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm , N/mm²	Yield Strength, N/mm²	Elongation (%)	Hardness HB	Ruling Section
3 T60 Tube	Hardened and Tempered	1150-1350	1050	6	341-401	19.05 mm minimum OD

Carbon Manganese Steel Tube T64

Chemical Composition Limits
Weight%	C	Si	Mn	Cr	Ni	Mo
T64 Tube	0.17-0.25	0.10-0.35	1.30-1.70	0.25	0.40 max	0.10

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm , N/mm²	Yield Strength, N/mm²	Hardness HB	Ruling Section
T64Tube	Cold Drawn + Tempered	550-750	460	152-217	3/16" OD to 7/16" OD

Aircraft Stainless Steel BS T66 / 2T66 seamless tube

BS T66 is the British aerospace standard for seamless tube in stainless steel 347. It is often dual certified to BS T72 and offers good corrosion resistance and good weldability.

Chemical Composition Limits
Weight%	C	Si	Mn	Cr	Ni	Nb	P + S max
2 T66 Tube	0.08 max	0.20-1.0	0.50-2.0	17-19	9-12	10 X C/1.0	P 0.035 S 0.025

Typical Mechanical Properties

Grade	Tensile Strength Rm , N/mm²	Proof Strength Rp 0.2, N/mm²	Hardness HB	Ruling Section
2T66 Tube	550-700	210-340	197 max	1/8" OD to 3 1/2 OD

Stainless Steel Tube T67

Chemical Composition Limits
Weight%	C	Si	Mn	Cr	Ni	Ti	P + S max
2 T67 Tube	0.08	0.20-1.00	0.50-2.00	17-19	9.0-12	5C / 0.7	P 0.035 S 0.025

Typical Mechanical Properties

Grade	Tensile Strength Rm , N/mm²	Yield Strength, N/mm²	Hardness HB	Ruling Section
2T67 Tube	550-700	210-340	197 max	3/16" OD to 2 1/2 OD

Stainless Steel Tube T68

BS T68 is the British aerospace standard for seamless tube in stainless steel 347 with a minimum tensile strength of 800N/mm2.

Chemical Composition Limits
Weight%	C	Si	Mn	Cr	Ni	P + S max
2 T68 Tube	0.08	0.20-1.00	0.50-2.00	17-19	9-12	P 0.035 S 0.025

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm , N/mm²	Yield Strength, N/mm²	Hardness HB	Ruling Section
T68 Tube	Cold Drawn	800-1100	700	229-375	1" OD to 1 1/4 OD

Aircraft Stainless Steel BS T72 seamless tube

BS T72 is the British aerospace standard for seamless tube in stainless steel 347 with the addition of copper. It is often dual certified to BS T66 and offers good corrosion resistance and good weldability. T72 is designed for use in hydraulic applications.

Chemical Composition Limits
Weight%	C	Cu	Si	Mn	Cr	Ni	Nb	P+S max
T72 Tube	0.08 max	0.50 max	0.20-1.0	0.50-2.0	17-19	9-12	5 X C/1.0	P 0.035 S 0.025

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm , N/mm²	Proof Stress Rp 0.2,, N/mm²	Elongation in 5.65 √Cross Sectional Area%	Ruling Section
T72 Tube	Solution Annealed	550-700	210-340	40	1/8" OD to 3 1/4 OD

Non-Corrosion Resisting Steel DTD 5082

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
DTD 5082	0.18-0.26	0.10-0.35	0.40-0.80	P 0.020 S 0.015	0.80-1.20	0.15-0.25	0.50 max
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni
AFNOR 25C04	0.22-0.28	0.10-0.40	0.60-0.90	P 0.035 S 0.035	0.85-1.15	0.15-0.30	-
WS 1.7218	0.22-0.29	0.15-0.40	0.50-0.80	P 0.035 S 0.035	0.90-1.20	0.15-0.30	-

Typical Mechanical Properties

Grade	Yield Strength (0.2% Offset)		Tensile Strength		Elongation % min
Grade	hbar	tonf/in²	hbar	tonf/in²	Elongation % min
DTD 5082A	88 min	51 min	115 min 130 max	75 min 85 max	8

Alloy Steel Fortiweld MSRR6078

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	B	Mo	Fe
Fortiweld MSRR6078	0.1-0.14	0.40 max	0.45-0.70	P 0.040 S 0.040	0.0015-0.0050	0.40-0.60	Bal

Stainless Steel 301 Annealed (AMS 5901)

Grade 301 is a 17% Chromium / 7% Nickel austenitic stainless steel. It is supplied in a range of different conditions/tempers depending on the level of strength required. It has good resistance to atmosphere corrosion and its bright attractive surface make it an excellent choice for decorative structural applications.

Resistance to Corrosion & Oxidation
Grade 301 has good resistance to oxidation at temperatures up to 1550°F, but is not recommend for use above 1600°F. 301 is resistance to a variety of corrosive media. However, it's corrosion resistance properties are not as good as the 18-8 chromium-nickel steels and its susceptibility to carbide precipitation during welding restricts its use in many applications in favour of 304/304L alloy. The mechanical properties for the different tempers of 301 are obtained by cold working and not by heat treating. 301 Annealed material has a tensile strength of 75ksi minimum and is used for deep and shallow formed parts.

Chemical Composition Limits
Weight%	C	Si	Mn	P + S max	Cr	Ni	Cu	Mo	Fe
AMS 5901 301 Annealed	0.15 max	1.00 max	2.0 max	0.040 P 0.030 S	16-18	6-8	0.75 max	0.75 max	Bal

Typical Mechanical Properties

Condition	Tensile Strength Min		0.2% Yield Strength Min		Elongation % in 2" (50.8mm)	Hardness HRC
Condition	Ksi	MPa	Ksi	MPa	Elongation % in 2" (50.8mm)	Hardness HRC
AMS 5901 301 Annealed	75	515	30	205	40	92 HRB
AMS 5517 301 1/4 Hard	125	862	75	517	25	25
AMS 5518 301 1/2 Hard	150	1,034	110	758	18	32
AMS 5902 301 3/4 Hard	175	1,207	125	931	12	37
AMS 5519 301 Full Hard	185	1,276	140	965	9	41

Stainless Steel 301 1/4 Hard (AMS 5517)

Resistance to Corrosion & Oxidation
Grade 301 has good resistance to oxidation at temperatures up to 1550°F, but is not recommend for use above 1600°F. 301 is resistance to a variety of corrosive media. However, it's corrosion resistance properties are not as good as the 18-8 chromium-nickel steels and its susceptibility to carbide precipitation during welding restricts its use in many applications in favour of 304/304L alloy. The mechanical properties for the different tempers of 301 are obtained by cold working and not by heat treating. 301 1/4 Hard (AMS 5517) material has a miniumum tensile strength of 125ksi and is used in the fabrication of parts that require moderate drawing or forming.

Chemical Composition Limits
Weight%	C	Si	Mn	P + S max	Cr	Ni	Cu	Mo	Fe
AMS 5517 301 1/4 Hard	0.15 max	1.00 max	2.0 max	0.040 P 0.030 S	16-18	6-8	0.75 max	0.75 max	Bal

Typical Mechanical Properties

Chemical Composition Limits
Weight%	C	Si	Mn	P + S max	Cr	Ni	Cu	Mo	Fe
AMS 5517 301 1/4 Hard	0.15 max	1.00 max	2.0 max	0.040 P 0.030 S	16-18	6-8	0.75 max	0.75 max	Bal

Stainless Steel 301 1/2 Hard (AMS 5518)

Resistance to Corrosion & Oxidation
Grade 301 has good resistance to oxidation at temperatures up to 1550°F, but is not recommend for use above 1600°F. 301 is resistance to a variety of corrosive media. However, it's corrosion resistance properties are not as good as the 18-8 chromium-nickel steels and its susceptibility to carbide precipitation during welding restricts its use in many applications in favour of 304/304L alloy. The mechanical properties for the different tempers of 301 are obtained by cold working and not by heat treating. 301 1/2 Hard (AMS 5518) material has a miniumum tensile strength of 150ksi and is used in the fabrication of parts that require strength and involves moderate drawing or forming.

Chemical Composition Limits
Weight%	C	Si	Mn	P + S max	Cr	Ni	Cu	Mo	Fe
AMS 5518 301 1/2 Hard	0.15 max	1.00 max	2.0 max	0.040 P 0.030 S	16-18	6-8	0.75 max	0.75 max	Bal

Typical Mechanical Properties

Condition	Tensile Strength Min		0.2% Yield Strength Min		Elongation % in 2" (50.8mm)	Hardness HRC
Condition	Ksi	MPa	Ksi	MPa	Elongation % in 2" (50.8mm)	Hardness HRC
AMS 5901 301 Annealed	75	515	30	205	40	92 HRB
AMS 5517 301 1/4 Hard	125	862	75	517	25	25
AMS 5518 301 1/2 Hard	150	1,034	110	758	18	32
AMS 5902 301 3/4 Hard	175	1,207	125	931	12	37
AMS 5519 301 Full Hard	185	1,276	140	965	9	41

Stainless Steel 301 Full Hard (AMS 5519)

Resistance to Corrosion & Oxidation
Grade 301 has good resistance to oxidation at temperatures up to 1550°F, but is not recommend for use above 1600°F. 301 is resistance to a variety of corrosive media. However, it's corrosion resistance properties are not as good as the 18-8 chromium-nickel steels and its susceptibility to carbide precipitation during welding restricts its use in many applications in favour of 304/304L alloy. The mechanical properties for the different tempers of 301 are obtained by cold working and not by heat treating. 301 Full Hard (AMS 5519) material has a miniumum tensile strength of 185ksi and is used in the fabrication of parts that require high strength and involves moderate drawing or forming.

Chemical Composition Limits
Weight%	C	Si	Mn	P + S max	Cr	Ni	Cu	Mo	Fe
AMS 5901 Full Hard	0.15 max	1.00 max	2.0 max	0.040 P 0.030 S	16-18	6-8	0.75 max	0.75 max	Bal

Typical Mechanical Properties

Condition	Tensile Strength Min		0.2% Yield Strength Min		Elongation % in 2" (50.8mm)	Hardness HRC
Condition	Ksi	MPa	Ksi	MPa	Elongation % in 2" (50.8mm)	Hardness HRC
AMS 5901 301 Annealed	75	515	30	205	40	92 HRB
AMS 5517 301 1/4 Hard	125	862	75	517	25	25
AMS 5518 301 1/2 Hard	150	1,034	110	758	18	32
AMS 5902 301 3/4 Hard	175	1,207	125	931	12	37
AMS 5519 301 Full Hard	185	1,276	140	965	9	41

Stainless Steel 302 (AMS 5516)

Alloy 302 (also know as 18-8) is an austenitic stainless steel it provides useful resistance to corrosion on a wide range of moderately oxidising to moderately reducing environments. Alloy 302 is used widely in equipment and utensils for processing and handling of food, beverages and dairy products. Heat exchangers, piping, tanks and other process equipment in contact with fresh water also utilise these alloys. Building facades and other architectural and structural applications exposed to non-marine atmospheres also heavily utilise the 18-8 alloys. In addition, a large variety of applications involve household and industrial chemicals.

Chemical Composition Limits
Weight%	C	Si	Mn	P and S max	Cr	Ni	Mo	Cu
Alloy 302 AMS 5516	0.15 max	1.00 max	2.0 max	0.040 P + 0.030 S	17-19	8-10	0.75	0.75

Typical Mechanical Properties

Alloy	Yield Strength 0.2% (ksi)	Ultimate Tensile Strength (ksi)	% Elongation in 2 " or 50.8 mm	Hardness, Max HB
Alloy 302 AMS 5516	36-60	75-110	40.8	92
Minimum Mechanical Properties required property by ASTM A240 and ASME SA 240

Stainless Steel 303 / Alloy 303Se / Alloy 303 Sulf

Stainless Steel 303 is a free machining stainless steel. Due to the addition of sulfur this 18-8 chrome nickel stainless steel has enhanced machinability where before it was tough and difficult to machine. Stainless Steel 303 is widely used in the screw machine industry, as well as for use in shafts, valves and fittings. Stainless Steel 303 is not recommended for vessels containing gases or liquids under high pressure.

Chemical Composition Limits
Weight%	C	Mn	Si	P	S	Cr	Ni	Mo	Se	Cu
Alloy 303 Se AMS 5640 Ty 2	0.15 max	2 max	1 max	0.12-0.17	0.04 max	17-18	8-10	1 max	0.15 - 0.40	1.00 max
Alloy 303 Sulf AMS 5640 Ty1	0.15 max	2 max	1 max	0.15 max	0.15 min	17-19	8-10	1 max	-	1 max

Typical Mechanical Properties

Alloy	Ultimate Tensile Strength (ksi)	Yield Strength 0.2% (ksi)	Elongation 2" (%)	Reduction of Area (%)	Brinell Hardness
Alloy 303	90	35	50	55	160
Typical Properties for 1" diameter round bar, annealed 1900°F

Stainless Steel 304 (AMS 5513) /304L (AMS 5511)

Type 304 is a variation of the basic 18-8 grade, Type 304, with a higher chromium and lower carbon content. Lower carbon minimizes chromium carbide precipitation due to welding and its susceptibility to intergranular corrosion. In many instances, it can be used in the ”as-welded“ condition, while Type 304 must be annealed in order to retain adequate corrosion resistance.

Type 304L is an extra low-carbon variation of Type 304 with a 0.03% maximum carbon content that eliminates carbide precipitation due to welding. As a result, this alloy can be used in the ”as-welded“ condition, even in severe corrosive conditions. It often eliminates the necessity of annealing weldments except for applications specifying stress relief. It has slightly lower mechanical properties than Type 304.

Chemical Composition Limits
Weight%	C	Si	Mn	P + S	Cr	Ni	Fe	Mo	Cu
AMS 5511 304L	0.03 max	1.00 max	2.0 max	0.040 P 0.03 S	18.0 - 20.0	8.0 - 11.00	Bal	0.75 max	0.75 max
AMS 5513 304	0.08 max	1.00 max	2.0 max	0.040 P 0.03 S	18.0 - 20.0	8.0 - 10.5	Bal	0.75 max	0.75 max

Typical Mechanical Properties

Specification	Tensile Strength (ksi)	Yield Strength (ksi)	Elongation (%)	Reduction of Area	Hardness HB
Sheet (Annealed) AMS 5511	100 max	-	40	-	-
Sheet (Annealed) AMS 5513	75 min	30	40	-	202
Bar (Sol Treated) 304 - AMS 5639	75	30	40	50
Bar (Sol Treated) 304L - AMS 5647	-	-	-	-	140-241

304 Stainless Steel Tube

Chemical Composition Limits
Weight%	Cr	Ni	Mn	Si	Mo	C	P	S	Ti
304	18-20	8-11	2.00	0.75	-	0.080	0.040	0.030	-
304L	18-20	8-13	2.00	0.75	-	0.035	0.040	0.030	-

Typical Mechanical Properties

Grade	Tensile Strength Rm N/mm²	Yield Strength Rp 0.2, N/mm²	Elongation (%)
304 Annealed	500-700	195	40
304L Annealed	460-680	180	40

309 Stainless Steel

Alloy 309 is an austenitic chromium-nickel stainless steel which has excellent heat-resisting properties. Alloy 309 has improved corrosion resistance and better creep strength than alloy 304. Alloy 309 is used in furnace parts, fire box sheets, high temperature containers and weld wire.

Chemical Composition Limits
Weight%	C	P	Si	Ni	Mn	S	Cr	Fe	Mo	Cu
Alloy 309	0.08 max	0.040 max	1 max	12-15	2 max	0.030 max	22-24	Bal	0.75 max	0.75 max

Typical Mechanical Properties

Condition	Ultimate Tensile Strength (MPa)	Yield Strength 0.2% (MPa)	Elongation 2" (%)	Reduction of Area (%)	Rockwell B Hardness
Alloy 309 round bar 1" annealed 1950°F, water quench	620	276	50	77	83

Stainless Steel 310 (AMS 5521 / AMS 5651)

Alloy 310 is a austenitic chromium-nickel stainless steel. Alloy 310 is used where good corrosion and heat resistance are required. Alloy 310 has excellent oxidation resistance and can resist oxidation or scaling up to 2000°F. Due to this Alloy 310 is widely used for furnace applications.

Chemical Composition Limits
Weight%	C	Si	Mn	P + S max	Cr	Ni	Fe	Mo	Cu
Alloy 310	0.08 max	1.00 max	2.0 max	0.040 P 0.030 S	24-26	19-22	Bal	0.75 max	0.75 max

Typical Mechanical Properties

Alloy	Ultimate Tensile Strength (ksi)	Yield Strength (ksi)	Elongation %	Reduction of Area (%)	Hardness HRB
Type 310 Sheet (Sol Trtd) AMS 5521	75-100	30	40	-	95 max
Type 310 Bar (Sol Trtd) AMS 5651	-	-	-	-	187 max

Alloy 310S (Wst 1.4845)

Alloy 310S Tube is an austenitic heat resistant stainless steel with good oxidation resistance and creep strength up to about 1000°C in air, suitable for scaling. Used for furnaces, burners, ignition systems, chemical and petrochemical industry.

Chemical Composition Limits
Weight%	Cr	Ni	Mn	Si	C	Mo	P	S	Cu
Alloy 310S	24-26	19-22	2.00 max	1 max	0.080 max	0.75 max	0.040 max	0.030 max	0.75 max

Typical Mechanical Properties

Alloy	Tensile Strength (MPa)	Yield Strength (0.2% Offset) MPa	Elongation %
Type 310S Tube Annealed	500-750	210	35

Stainless Steel Type 316 / Stainless Steel Type 316L

Type 316 is an austenitic chromium nickel stainless steel. It also contains molybdenum which increases its general corrosion resistance as well as the mechanical properties at elevated temperatures. The properties of type 316 are similar to type 304; however 316 is stronger at elevated temperatures amd also corrosion resistance is improved particularly against sulphates, phosphates and other salts as well as reducing acids such as sulphuric, sulphurous and phosphoric. Type 316L is an extra low carbon version of type 316.

Chemical Composition Limits
Weight%	C	Mn	P	S	Si	Cr	Ni	Mo	Cu	Fe
316	0.08	1.25-2.00	0.040	0.030	1.00 max	16-18	10-14	2-3	1.00 max	Bal
316L	0.03	1.25-2.00	0.040	0.030	1.00 max	16-18	10-14	2-3	1.00 max	Bal

Typical Mechanical Properties

Material	Form	Tensile Strength (ksi)	Yield Strength (ksi)	% Elongation	Hardness HB
Alloy 316L	316L Sheet AMS 5507	100 max	-	45	-
Alloy 316	316 Sheet AMS 5524	75 min	30	45	207 max

Stainless Steel 316 Tube

Chemical Composition Limits
Weight%	Cr	Ni	Mn	Si	Mo	C	P	S	Ti
316	16-18	11-14	2.00	0.75	2-3	0.080	0.040	0.030	-
316L	16-18	10-15	2.00	0.75	2-3	0.035	0.040	0.030	-
316Ti	16.5-18	10.5-12	1.90	0.75	2-2.5	0.060	-	-	0.3

Typical Mechanical Properties

Material	Tensile Strength Rm N/mm²	Yield Strength Rp 0.2, N/mm²	% Elongation
Alloy 316 Tube	510-710	205	40
Alloy 316L Tube	460-690	190	40
Alloy 316Ti Tube	500-730	210	35

Stainless Steel 317/ 317L

Alloy 317 and 317L are molybdenum-bearing austenitic stainless steels. Due to the molybdenum content of 3-4% 317 and 317L are more resistant to general corrosion and pitting/crevice corrosion than type 304. 317 and 317L are used in the Food, Pharmaceutical, Marine and Architecture industries.

Chemical Composition Limits
Weight%	C	Mn	Si	Cr	Ni	Mo	P	S	N	Fe
317	0.08 max	2.0 max	0.75 max	18-20	11-15	3-4	0.045	0.030 max	0.10 max	Bal
317L	0.030 max	2.0 max	0.75 max	18-20	11-15	3-4	0.045	0.030 max	0.10 max	Bal

Typical Mechanical Properties

Material	Ultimate Tensile Strength (Mpa)	0.2 % Yield Strength (Mpa)	% Elongation in 2"	Rockwell B Hardness
Alloy 317	515	205	35	95
Alloy 317L	515	205	40	95
Minimum Mechanical Properties by ASTM A240 and ASME SA 240

Stainless Steel 321 (AMS 5510 / AMS 5645)

Type 321 is a chromium-nickel stainless steel and with the addition of titanium, type 321 is resistant to intergranular corrosion. Type 321's general corrosion is less than Type 302. Type 321 is used where resistance to intergranular corrosion is required and where the parts are subjected to sustained heating or cooling within the range of 800 to 1500ºF. Type 321 is commonly used in applications such as exhaust stacks, manifolds and ring collectors.

Chemical Composition Limits
Weight%	C	Si	Mn	P+S	Cr	Ni	Ti	N	Fe	Cu	Mo
AMS 5510 Alloy 321	0.08 max	0.25-1.00	2.0 max	0.040P 0.030S	17-19	9-12	0.7 max	0.1 max	Bal	0.75 max	0.75 max

Typical Mechanical Properties

Material	Condition	Tensile Strength (ksi)	Yield Strength (ksi)	% Elongation	Hardness HB
Alloy 321 AMS 5510	AMS 5510 Sheet (Sol Trtd)	70-100	25	40	-
Alloy 321 AMS 5645	AMS 5645 Bar (Sol Trtd)	-	-	-	255 max

Stainless Steel 321

Chemical Composition Limits
Weight%	C	Si	Mn	P+S	Cr	Ni	Ti	N	Fe	Cu	Mo
AMS 5510 Alloy 321	0.08 max	0.25-1.00	2.0 max	0.040P 0.030S	17-19	9-12	0.7 max	0.1 max	Bal	0.75 max	0.75 max

Typical Mechanical Properties

Material	Tensile Strength Rm, N/mm²	Yield Strength Rp 0.2, N/mm²	% Elongation
Alloy 321 Tube	500-730	200	35

Alloy 330 / Stainless Steel 330

Alloy 330 is an austenitic heat and corrosion resisting alloy which has an exceptional combination of strength and resistance to carburization, oxidation and thermal shock. Alloy 330 is used in a wide range of applications in high temperature industrial environments.

Chemical Composition Limits

Weight%

330

17-20

34-37

0.75-1.5

0.08 max

2.00 max

0.030 max

Bal

0.75 max

0.50 max

0.025 max

0.005 max

Typical Mechanical Properties

Material	Ultimate Tensile Strength (ksi)	0.2 % Yield Strength (ksi)	% Elongation in 2"	Rockwell B Hardness
Alloy 330 Annealed	70	25	30	≤95

Stainless Steel 347 (AMS 5512 / AMS 5646)

Alloy 347 is a chromium nickel stainless steel which has been modified by the addition of columbium and tantalum. The main advantage of this is an excellent resistance to intergranular corrosion which is common to other austenitic stainless steels following exposure to temperatures of 800° to 1500°F.

Alloy 347 is generally used where corrosive conditions are severe, such as aircraft exhaust stacks, manifolds and ring collectors. Type 347 is also used for heavy welded assemblies which cannot be annealed after welding or where the operating conditions cause exposure within the temperature range between 800° to 1500°F.

Chemical Composition Limits

Weight%

Cb + Ta

347

0.08 max

0.040 max

1.00 max

9-12

2.0 max

0.030 max

17-19

10 x C min

Bal

1.00 max
only AMS 5646

0.75 max

347H

0.04-0.10

0.040 max

1.00 max

9-12

2.0 max

0.030 max

17-19

10 x C min

Bal

Typical Mechanical Properties

Material	Yield Strength (ksi)	Tensile Strength (ksi)	% Elongation	Hardness HB
Alloy 347 Sheet (Sol Trtd) AMS 5512	25	70-105	40	-
Alloy 347 Bar (Sol Trtd) AMS 5646	-	-	-	255 max

Corrosion Resisting Alloy 347

Type 347 is generally used where corrosive conditions are severe, such as aircraft exhaust stacks, manifolds and ring collectors. Type 347 is also used for heavy welded assemblies which cannot be annealed after welding or where the operating conditions cause exposure within the temperature range between 800° to 1500°F.

Chemical Composition Limits
Weight%	C	P	Si	Ni	Mn	S	Cr	Cb + Ta	Fe	Mo	Cu
347 Tube	0.08 max	0.040 max	1.00 max	9-12	2.0 max	0.030 max	17-19	10 x C min	Bal	0.75 max	0.75 max

Typical Mechanical Properties

Material	0.2% Offset Yield Strength	Ultimate Tensile Strength	% Elongation in 2" (50.8mm)	Hardness Brinell (Plate)
Alloy 347 Tube	30,000 psi 205 MPa	75,000 psi 515 MPa	40	201

Stainless Steel 410 (AMS 5504)

Type 410 is a basic hardenable martensitic stainless steel and is well suited for use in highly stressed parts where properties such as corrosion resistance, good strength and ductility are required. 410 is used for steam / gas turbine blades and buckets, bushings, valve components, fasteners, nuclear reactor control rod mechanisms, petrochemical equipment and machine parts.

Resisitance to oxidation and corrosion - Alloy 410 exhibits good corrosion resistance to atmospheric corrosion, potable water, food acids and to mildly corrosive chemical environments because of its ability to form a tightly adherent oxide film which protects the surfaces from further attack.

Chemical Composition Limits
Weight%	C	Si	Mn	P	S	Cr	Fe
Alloy 410	0.15 max	1.0 max	1.0 max	0.040 max	0.030 max	11.5-13.5	Bal

Typical Mechanical Properties

Material	Tempering Temp °C (°F)	0.2 % Yield Strength (Mpa)	Ultimate Tensile Strength (Mpa)	% Elongation in 2"	% Reduction of Area	Charpy V Notch Impact Strength (J)	Hardness Brinell
Alloy 410 Bar Hardened 1850°F (1010°C) 30 mins, oil quench, tempered 4 Hrs	260 (500)	1089	1331	17	62	76	401
Alloy 410 Bar Hardened 1850°F (1010°C) 30 mins, oil quench, tempered 4 Hrs	317 (700)	1069	1296	17	60	66	401
Alloy 410 Bar Hardened 1850°F (1010°C) 30 mins, oil quench, tempered 4 Hrs	482 (900)	1014	1303	18	58	38	401
Alloy 410 Bar Hardened 1850°F (1010°C) 30 mins, oil quench, tempered 4 Hrs	538 (1000)	917	965	19	62	33	285
Alloy 410 Bar Hardened 1850°F (1010°C) 30 mins, oil quench, tempered 4 Hrs	593 (1100)	724	827	20	63	52	248
Alloy 410 Bar Hardened 1850°F (1010°C) 30 mins, oil quench, tempered 4 Hrs	649 (1200)	634	731	21	65	119	223

Stainless Steel 416 (AMS 5610)

Type 416 is a high chromium martensitic free-machining stainless steel. Type 416 can be hardened by heat treatment to higher strength and hardness level. Type 416 is used for any part that requires considerable machining, golf club heads, axles, gears and pinions, lead screws, valve trim. Type 416 is not recommended for vessels containing gases or liquids under high pressure.

Chemical Composition Limits
Weight%	C	P	Si	Mn	S	Cr	Fe	Se
Alloy 416 Type 1	0.15 max	0.060 max	1 max	1.25 max	0.40 max	11.50-13.50	bal	0.18-0.35
Alloy 416 Type 2	0.15 max	0.060 max	1 max	2.50 max	0.40 max	11.50-13.50	bal	-

Typical Mechanical Properties

Material	Tempering Temp °F (°C)	0.2 % Yield Strength (Mpa)	Tensile Strength (Mpa)	% Elongation in 2"	% Reduction of Area	Hardness Brinell
Alloy 416 1" round bar, hardened 1800 °F (982°C) oil quench, tempered one hour	300 (149)	1034	1344	10	40	390
Alloy 416 1" round bar, hardened 1800 °F (982°C) oil quench, tempered one hour	500 (260)	979	1276	13	45	375
Alloy 416 1" round bar, hardened 1800 °F (982°C) oil quench, tempered one hour	700 (371)	1007	1310	13	48	390
Alloy 416 1" round bar, hardened 1800 °F (982°C) oil quench, tempered one hour	900 (482)	896	1158	14	50	341
Alloy 416 1" round bar, hardened 1800 °F (982°C) oil quench, tempered one hour	1000 (538)	793	1000	15	50	300
Alloy 416 1" round bar, hardened 1800 °F (982°C) oil quench, tempered one hours	1100 (593)	689	862	17	53	262
Alloy 416 1" round bar, hardened 1800 °F (982°C) oil quench, tempered one hours	1200 (650)	586	758	18	55	225

Stainless Steel 420 (AMS 5620/AMS 5621)

Alloy 420 is a martensitic stainless steel of the 12% Chromium type. Due to it's Chromium content 420 will achieve high hardness. Alloy 420 is used in many different applications including surgical and dental instruments, scissors, needle valves, gears, ball bearings, magnets etc. Alloy 420 should not be used for springs or heavily stressed parts that require to be operated at sub-zero temperatures.

Chemical Composition Limits
Weight%	C	P	Si	Fe	Mn	S	Cr
Alloy 420	0.15 min	0.040 max	1.00 max	Bal	1.00 max	0.030 max	12-14

Typical Mechanical Properties

Material	Tensile Strength (Mpa)	Proof Stress 0.2% (MPa)	% Elongation in 2"	% Reduction of Area	Hardness Brinell
Alloy 420 Ann Room Temp 1" Round Bar	655	345	25	55	196

Alloy 420F

Alloy 420F is a free-machining hardenable steel that is generally used in parts that require high hardness and good corrosion resistance. Alloy 420F is easy to machine, grind and polish and is used in many different applications from pump shafts, screw machines, cams, pivots, gears etc. Alloy 420F is not recommended for vessels containing gases or liquids under high pressure. 420F is supplied in either cold finished or hot finished bar in the annealed condition (hardness 241HB max).

Chemical Composition Limits
Weight%	C	Mn	Si	P	S	Cr	Se	Ni	Mo/Zr
Alloy 420F Type 1	0.30-0.40	1.25	1.00	0.060	0.030	12-14	0.18-0.35	0.10	0.60
Alloy 420F Type 2	0.30-0.40	1.25	1.00	0.060	0.15-0.35	12-14	-	0.50	0.60

Stainless Steel 422 (AMS 5655)

Alloy 422 is a hardenable stainless steel designed for use at temperatures of up to 1200ºF (649ºC). Alloy 422 has good resistance to scaling and oxidation. Through heat treatment, high mechanical properties can be developed. Alloy 422 is used in applications such as compressors or steam turbines and also in aircraft parts, valves, high temperature bolting etc.

Chemical Composition Limits

Weight%

Alloy 422

0.20-0.25

0.040 max

0.20-0.60

0.50-1.0

0.17-0.30

Bal

1.0

0.030 max

11.0-13.5

0.75-1.25

0.50

Typical Mechanical Properties

Material	Condition	0.2 % Yield Strength (ksi)	Ultimate Tensile Strength (ksi)	% Elongation in 2"	% Reduction of Area	Hardness HB
Alloy 422	Hardened & Tempered (AMS 5655)	140	115	13	25	293-341

Stainless Steel 430 (AMS 5627)

Grade 430, also known as type WL 1.4016 stainless steel combines good corrosion resistance with good formability and ductility. As Grade 430 has excellent resistance to nitric attack it is well suited to use in chemical applications. Grade 430 is generally used for domestic appliances, flue linings, scientific apparatus etc.

Chemical Composition Limits
Weight%	C	Mn	Si	P	S	Cr	Ni	Mo	Cu	Al	Sn
Alloy 430	0.12 max	1.00	1.00	0.04	0.03	16-18	0.75 max	0.50	0.50	0.05	0.05

Typical Mechanical Properties

Material	Condition	Tensile Strength (ksi)	Proof Stress 0.2% (ksi)	Elongation A5%	Hardness Rockwell B (HR B)
Alloy 430 Annealed Sheet	Annealed (AMS 5503)	65	35	20-22	86-90

Stainless Steel Grade 431

Alloy 431 is the most corrosion resistant of the martensitic grades. Due to Alloy 431's excellent tensile and torque strength and good toughness it is used in structural parts that are exposed to marine atmosphere, also for aircraft fasteners and fittings.

Chemical Composition Limits
Weight%	C	P	Si	Ni	Mn	S	Cr	Fe	Mo	Cu	N
Alloy 431	0.12-0.17	0.040 max	0.20-0.60	2-3	0.3	0.030	15.50-16.50	Bal	0.25	0.50	0.10

Typical Mechanical Properties

Material	Condition	Tensile Strength (MPa)	Proof Stress 0.2% (MPa)	Elongation 2"%	Reduction of Area	Brinell Hardness
Alloy 431	Alloy 431 Annealed	862	655	20	55	260
Alloy 431	Alloy 431 Heat Treated AMS 5628	1379	1034	10	40	-

Aircraft Stainless Steel BS S80 (MSRR 6573 / AMS 5628/ 431S29)

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Ni	Others (max)
4-S80 5-S80 6-S80 7- S80 Bar	0.12-0.20	1.00 max	1.00 max	P 0.030 S 0.025	15-18	2-3	Mo 0.3 / Co 0.05 / Cu 0.3/ Nb 0.05 / Sn 0.02 / Ti 0.05 / V 0.20 / W 0.05
Chemically similar British Specifications BS.970 Pt4 431 S29 (EN57)
Weight%	C	Si	Mn	P+S max	Cr	Ni	Others (max)
431S29 (EN57)	0.12-0.20	0.80 max	1.00 max	P 0.040 S 0.030	15-18	2-3	-
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Ni	Others (max)
AISI 431 SAE - 51431	0.20 max	1.00 max	1.00 max	P 0.040 S 0.030	15-17	1.25-2.5	-
AMS 5628D	0.12-0.17	0.20-0.60	0.30-0.80	P 0.040 S 0.030	15.50-17	2-3	Mo 0.50 / Cu 0.50 / N 0.10
MIL-S-86213 431	0.20 max	1.00 max	1.25 max	P 0.040 S 0.030	15-17	1.25-2.5	-
MIL-S-8967 (ASG)	0.13-0.17	0.20-0.60	0.30-0.80	0.025	15.50-16.50	2-3	Mo 0.25
MIL-S-187320	0.13-0.17	0.20-0.60	0.30-0.80	P 0.040 S 0.030	15.50-16.50	2-3	Mo 0.25 / N 0.10
MSRR 6573	-	-	-	-	-	-	-
Z15 CN17-03	-	-	-	-	-	-	-
BACM 85	-	-	-	-	-	-	-
WS 1.4044	-	-	-	-	-	-	-
WS 1.4057 XX22CrNi17	0.15-0.23	1.00 max	1.00 max	P 0.045 S 0.030	16-18	1.50-2.50	-
UNI X16CrNi16	0.10-0.20	1.00 max	1.00 max	P 0.040 S 0.030	15-17	1.50-2.5	-

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm N/mm²	Proof Stress Rp 0.2, N/mm²	Elongation A% √5.65 %	IZOD Impact FT/ Lbs	Hardness HB	Ruling Section	Product Range	Colour Code
6S80	HT	880/1080	690	12	25	255-321	2.5"	Round Square Flat Hexagon	Brown Black Red
7S80D	HT	-	-	-	15	-	2.5-4"	Round Square Flat Hexagon	Brown Black Red

Stainless Steel 440A

Alloy 440A is a high carbon and chromium martensitic stainless steel. Alloy 440A provides properties of stainless steel together with excellent hardness and moderate corrosion resistance. Alloy 440A is used in dental and surgical instruments, cutlery, pivot pins, valve parts.

Chemical Composition Limits
Weight%	C	P	Si	Mo	Mn	S	Cr	Fe	Ni	Cu
Alloy 440A	0.60-0.75	0.040	1.0	0.75	1.0	0.030	16-18	Bal	0.75	0.50

Typical Mechanical Properties

Material	Condition	Yield Strength 0.2% (MPa)	Ultimate Tensile Strength (MPa)	Elongation 2"%	Reduction of Area	Brinell Hardness
Alloy 440A	Hardened 1900°F, oil quench, tempered 600°F	1655	1793	5	20	512

Stainless Steel 440b (WS 1.4112)

Chemical Composition Limits
Weight %	C	S	Cr	Mo	Vanadium	Fe
CHRONIFER M-17B	0.85-0.95	0.03 max	17-19	0.90-1.30	0.07-0.12	Rem
Other Chemically similar Specifications
Weight %	C	S	Cr	Mo	Vanadium	Fe
WS 1.4112	0.85-0.95	0.03 max	17-19	0.90-1.30	0.07-0.12	Rem
X 90 CrMoV 18	0.85-0.95	0.03 max	17-19	0.90-1.30	0.07-0.12	Rem
AISI 440B~	0.85-0.95	0.03 max	17-19	0.90-1.30	0.07-0.12	Rem

Stainless Steel 440C

AISI 400C is a high carbon chromium steel is designed to provide stainless steel properties with maximum hardness. After heat-treatment Type 440C attains the highest hardness of any stainless steel (about 60 HRC). This stainless steel is principally used for bearing assemblies including ball bearings and should be considered for needle valves and ball check valves.

Chemical Composition Limits
Weight%	C	Si	Mn	P+S	Cr	Mo	Ni	Others
AISI 440C	0.95/ 1.2	1.0 max	1.0 max	0.04 P 0.03 S	16.0 / 18.0	0.75	-	-
AFNOR Z100 CD 17	0.90/ 1.2	1.0 max	1.0 max	0.04 P 0.03 S	16.0 / 18.0	0.35 / 0.75	0.50 max	Cu 0.50 max
AMS 5630	0.95/ 1.2	1.0 max	1.0 max	0.04 P 0.03 S	16.0/ 18.0	0.4/ 0.65	0.75 max	Cu 0.50 max
WS 1.4125 M-17C Chronifer X 105 CrMo17 Z100 CD 17	0.95/ 1.2	1.0 max	1.0 max	0.015 S max	16.0/ 18.0	0.8 max	-	-

Typical Mechanical Properties

Material	Condition	Yield Strength 0.2% (MPa)	Ultimate Tensile Strength (MPa)	Elongation 2"%	Reduction of Area	Brinell Hardness
Alloy 440C	Hardened 1900°F, oil quench, tempered 600°F	1896	1965	2	10	580

Stainless Steel 446

Alloy 446 is a ferritic, heat resisting, stainless chromium steel. Alloy 446 has extremely good resistance to reducing sulphurous gases, as well as very good resistance to oxidation in air. Alloy 446 also has good resistance to oil-ash corrosion and resistance to molton copper, lead and tin.

Chemical Composition Limits
Weight%	C	Si	Mn	P	S	Cr	N
Alloy 446	0.20 max	0.5	0.8	0.030 max	0.015 max	26.5	0.2

Stainless Steel 455/ Custom 455 (AMS 5617)

Alloy 455 is a martensitic age hardenable stainless steel, which has properties of high strength and good corrosion resistance. Alloy 455 is relatively soft and formable in the annealed condition, however through a single-stage aging treatment alloy 455 develops an exceptionally high yield strength with good ductility and toughness.

Chemical Composition Limits

Weight%

Cb + Ta

Alloy 455

0.05 max

0.040 max

0.50 max

7.5-9.5

1.5-2.5

0.10-0.50

0.50 max

0.030 max

11.0-12.5

0.50 max

0.80-1.4

Bal

Typical Mechanical Properties

Material	Condition	0.2 % Yield Strength (Mpa)	Ultimate Tensile Strength (Mpa)	Notch Tensile Strength	% Elongation in 4D	% Reduction of Area	Rockwell C Hardness	Charpy V Notch Impact Strength (ft-lbs)
Alloy 455 Bar 1" Section Custom 455®	A	793	1000	1585	14	60	31	70
Alloy 455 Bar 1" Section Custom 455®	H900	1689	1724	1792	10	45	49	9
Alloy 455 Bar 1" Section Custom 455®	H950	1551	1620	2068	12	50	48	14
Alloy 455 Bar 1" Section Custom 455®	H1000	1379	1448	2000	14	55	45	20
Alloy 455 Bar 1" Section Custom 455®	H1050	1207	1310	1793	15	55	40	35

Stainless Steel 465 / Custom 465 (AMS 5936)

Alloy 465 is a martensitic, age hardenable alloy. Alloy 465 is capable of ultimate tensile strength in excess of 250 ksi in the overaged (H 950) condition. By overaging Alloy 465 to the H1000 condition, Alloy 465 obtains a superior combination of strength, toughness and stress corrosion cracking.

Chemical Composition Limits
Weight%	C	P	Si	Ni	Ti	Mn	S	Cr	Mo	Fe
Alloy 465	0.02 max	0.015 max	0.25 max	10.75-11.25	1.5-1.8	0.25 max	0.010 max	11.0 -12.5	0.75-1.25	Bal

Typical Mechanical Properties

Material	Condition	Orientation	0.2 % Yield Strength (Mpa)	Ultimate Tensile Strength (Mpa)	% Elongation in 4D	% Reduction of Area	Notch Tensile Strength	NTS/UTS	Charpy V Notch Impact	Rockwell C Hardness
Alloy 465 Bar 3" to 9" Round Custom 465®	H950	Long	1655	1765	12	57	2475	1.40	16	49.5
Alloy 465 Bar 3" to 9" Round Custom 465®	H950	Trans	1648	1765	11	49	2386	1.35	13	49.5
Alloy 465 Bar 3" to 9" Round Custom 465®	H1000	Long	1496	1593	14	63	2427	1.52	35	47.5
Alloy 465 Bar 3" to 9" Round Custom 465®	H1000	Trans	1503	1600	13	57	2392	1.50	28	47.5

Stainless Steel 13-8 Mo (AMS 5864/ AMS 5629/ UNS S13800)

13-8 stainless steel alloy is a martensitic precipitation-hardening stainless steel that has excellent strength, high hardness, superior toughness, and good corrosion resistance.

Compared to other ferrous-base materials alloy 13-8 Stainless Steel offers a high level of useful mechanical properties under severe environmental conditions.

Alloy 13-8 Stainless Steel uses: Aerospace components, landing gear, nuclear reactor components, petrochemical industry, injection molding equipment etc. Alloy 13-8 Stainless Steel in the annealed condition can be strengthened further by relatively low temperature heat treatment.

Chemical Composition Limits
Weight%	C	P	Si	Ni	Al	Fe	Mn	S	Cr	Mo	N
13-8 Mo	0.05 max	0.010 max	0.10 max	7.5-8.5	0.90-1.35	Bal	0.10 max	0.008 max	12.25-13.25	2.0-2.5	0.01 max

Typical Mechanical Properties

Material	Condition	Ultimate Tensile Strength (ksi)	0.2 % Yield Strength (ksi)	Elongation % in 2D	% Reduction of Area	Rockwell C Hardness
Alloy 13-8 Sheet AMS 5864	Cond A	-	-	-	-	38 max
Alloy 13-8 Sheet AMS 5864	H950	220	205	10	45	45
Alloy 13-8 Sheet AMS 5864	H1000	205	190	10	50	43
Alloy 13-8 Sheet AMS 5864	H1025	185	175	11	50	41
Alloy 13-8 Sheet AMS 5864	H1050	175	165	12	50	40
Alloy 13-8 Sheet AMS 5864	H1100	150	135	14	50	34
Alloy 13-8 Sheet AMS 5864	H1150	135	90	14	50	30

Material	Condition	Ultimate Tensile Strength (ksi)	0.2 % Yield Strength (ksi)	Elongation % in 2D	% Reduction of Area	Rockwell C Hardness
Alloy 13-8 Bar AMS 5629	Cond A	-	-	-	-	363 HB Max
Alloy 13-8 Bar AMS 5629	H950	220	205	10	45	45
Alloy 13-8 Bar AMS 5629	H1000	205	190	10	50	43
Alloy 13-8 Bar AMS 5629	H1025	185	175	11	50	41
Alloy 13-8 Bar AMS 5629	H1050	175	165	12	50	40
Alloy 13-8 Bar AMS 5629	H1100	150	135	14	50	34
Alloy 13-8 Bar AMS 5629	H1150	135	90	14	50	30

15-5PH Stainless Steel (AMS 5659/ AMS 5862)

Alloy 15-5 is a precipitation hardening alloy exhibiting high strength and hardness with moderate corrosion resistance. Alloy 15-5 is a variant of the older 17-4 and 15-5 was designed to have greater toughness than S17400, especially in the through-thickness (short transverse) direction. Alloy 15-5 is used in applications that require high transverse strength and toughness such as engine parts, aircraft components, nuclear reactor components etc.

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Ni	Cu	Cb	Fe	Mo
AMS 5659 15-5	0.07	1.0	1.0	0.03P 0.015S	14.0-15.50	3.50-4.50	2.50-4.50	0.45	Bal	0.50

Typical Mechanical Properties

Material	Condition	Ultimate Tensile Strength (ksi)	0.2 % Yield Strength (ksi)	Elongation % in 2D	% Reduction of Area	Rockwell C Hardness
Alloy 15-5 PH Bar AMS 5659	Cond A	-	-	-	-	363 HB max
Alloy 15-5 PH Bar AMS 5659	H900	190	170	10	35	388-444
Alloy 15-5 PH Bar AMS 5659	H925	170	155	10	38	375-429
Alloy 15-5 PH Bar AMS 5659	H1025	155	145	12	45	331-401
Alloy 15-5 PH Bar AMS 5659	H1075	145	125	13	45	311-375
Alloy 15-5 PH Bar AMS 5659	H1100	140	115	14	45	302-363
Alloy 15-5 PH Bar AMS 5659	H1150	135	105	16	50	277-352

Material	Condition	Ultimate Tensile Strength (ksi)	0.2 % Yield Strength (ksi)	Elongation % in 2D	% Reduction of Area	Rockwell C Hardness
Alloy 15-5 PH Sheet/Plate AMS 5862	Cond A	-	-	-	-	38 max
Alloy 15-5 PH Sheet/Plate AMS 5862	H900	190	170	5	-	40-47
Alloy 15-5 PH Sheet/Plate AMS 5862	H925	170	155	5	-	38-45
Alloy 15-5 PH Sheet/Plate AMS 5862	H1025	155	145	5	-	35-42
Alloy 15-5 PH Sheet/Plate AMS 5862	H1075	145	125	5	-	33-39
Alloy 15-5 PH Sheet/Plate AMS 5862	H1100	140	115	5	-	32-38
Alloy 15-5 PH Sheet/Plate AMS 5862	H1150	135	105	8	-	28-37

PH 15-7 Mo Stainless Steel (AMS 5520/ UNS S15700)

PH 15-7 Mo is a precipitation hardenening stainless steel used for applications requiring high strength and moderate corrosion resistance. It is similar to 17-7 with the substitution of 2% Molybdenum for 2% Chromium resulting in higher room and elevated temperature strength for 15-7 Mo. PH 15-7 Mo stainless steel may be formed in a soft austenitic condition and then hardened to high strength levels by low temperature heat treatments. This allows miminum distortion compared to other quench and temper hardening processes. For maximum strength requirements, 15-7 Mo strip can be supplied in the hard-rolled Condition C for heat treatment to condition CH900.

Chemical Composition Limits
Weight%	C	Mn	Si	P	S	Cr	Ni	Mo	Al
15-7Mo	0.09	1	1	0.04	0.03	14-16	6.50-7.75	2-3	0.75-1.5

Typical Mechanical Properties

Material	Condition	Thickness (in)	Tensile Strength (ksi)	Yield Strength (ksi)	Elongation %	Hardness
Alloy 15-7 Mo	Solution Treated	<0.005	150 (max)	65 (max)	25	100 HB (max)
Alloy 15-7Mo	TH1050 (AMS 5520)	0.010-0.020	190	170	4	40 HRC
Alloy 15-7 Mo	TH1050 (AMS 5520)	0.020-0.1875	190	170	5	40 HRC
Alloy 15-7 Mo	TH1050 (AMS 5520)	0.1875-0.500	190	170	6	40 HRC
Alloy 15-7 Mo	RH950 (AMS 5520)	0.010-0.020	225	220	3	45 HRC
Alloy 15-7 Mo	RH950 (AMS 5520)	0.020-0.1875	225	220	4	45 HRC
Alloy 15-7 Mo	RH950 (AMS 5520)	0.1875-0.500	225	220	5	45 HRC
Alloy 15-7 Mo	Condition C	-	200	175	1	41 HRC
Alloy 15-7 Mo	Condition CH900	-	240	230	1	46 HRC

17-4PH Stainless Steel Sheet and Plate (AMS 5604), Powder (AMS 7012)

17-4 PH Stainless Steel is a martensitic, precipitation-hardening stainless steel that provides an outstanding combination of high strength and hardness along with excellent corrosion resistance. 17-4 PH has good fabricating characteristics and can be age hardened by a single step, low temperature treatment. 17-4 PH is a versatile material typically used in the aerospace, chemical, petrochemical, food processing, paper and general metalworking industries.

Chemical Composition Limits
Weight%	C	Si	Mn	P + S max	Cr	Ni	Cb + Ta	Cu
AMS 5604 17-4PH	0.07 max	1.0 max	1.0 max	0.04 P 0.03 S	15.0 - 17.5	3.0 - 5.0	5 X C / 0.45	3.0 - 5.0

Typical Mechanical Properties

Condition	Ultimate Tensile Strength (ksi)	0.2 % Yield Strength (ksi)	Elongation % in 2D	% Reduction of Area	Rockwell C Hardness
Cond A	-	-	-	-	39 max
H900	190	170	10	40	40-47
H925	170	155	10	44	38-45
H1025	155	145	12	45	34-42
H1075	145	125	13	44	31-38
H1100	140	115	14	45	30-37
H1150	135	105	16	50	28-37

17-7PH Stainless Steel (AMS 5528 / AMS 5529/ AMS 5644)

Alloy 17-7PH a precipitation hardening stainless steel that provides high strength and hardness, excellent fatigue properties, good corrosion resistance, good formability, and minimum distortion upon heat treatment.

Alloy 17-7PH provides valuable property combinations particularly well suited for aerospace applications. This special alloy also provides benefits for other applications requiring high strength and good corrosion resistance, as well as excellent properties for flat springs at temperatures up to 315°C (600°F ).

Chemical Composition Limits
Weight%	C	Mn	Si	P	S	Cr	Ni	Al
17-7PH	0.09 max	1.00 max	1.00 max	0.040 max	0.030 max	16.00-18.00	6.50-7.75	0.75-1.50

Typical Mechanical Properties

Material	Condition	Ultimate Tensile Strength (ksi)	0.2 % Yield Strength (ksi)	Elongation % in 2D	% Reduction of Area	Rockwell C Hardness
17-7 Sheet / Strip AMS 5528	Cond A	105 max	65	20	-	92 HRB max
17-7 Sheet / Strip AMS 5528	TH1050	180-120	150	4-6	-	38-46
17-7 Sheet / Strip	RH950	220	200	9	-	46
17-7 Sheet / Strip AMS 5529	Cond C	200 min	175 min	1	-	41 min
17-7 Sheet / Strip AMS 5529	CH 900	240 min	230 min	1	-	46 min
17-7 Bar AMS 5644	Cond A	170 min	140 min	6	25	363 HB min

Aircraft Stainless Steel Jethete M152 (BS S151/ S159)

Jethete M152 is a creep and corrosion resistant, hardened and tempered steel with a usual upper temperature limit of 560°C. It combines very good toughness and creep rupture properties making it an excellent alloy for use in highly stressed turbine blades, discs, screws, bolts and rings. Jethete M152 is supplied by Aircraft Materials in both bar form, to British Standards BS S151 and BS S159 and in sheet form to Rolls Royce specifications MSRR 6504 and MSRR 6514. It can also be supplied in mill productions to the US Aerospace specification AMS 5719.

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	N	V
Jethete M152	0.08-0.13	0.35 max	0.50-0.90	P 0.030 S 0.025	11-12.5	1.50-2.0	2-3	0.02-0.04	0.25-0.40

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Mpa	Yield Strength Mpa	Elongation %	Hardness HB	Ruling Section
S151A S151D	Softened Finally Heat Treated	930-1130	780	14	311max 286-311	- 150mm
S159A S159D	Softened Finally Heat Treated	1100-1300	900	8	311 max 321-388	50mm
AMS 5719 AMS 5719	Annealed Hardened & Double Templerd	1069 min	896	12	311 341-375	- -

Stainless Steel AM 355 (AMS 5547 / AMS 5743)

AM 355 is a chromium nickel molybdenum stainless steel. AM 355 is a heat treatable austentic/ martensitic alloy (depending on the heat treatment). The properties of AM355 are that of strength of a heat treatable martensitic grades with the corrosion resistance of some of the chromium nickel austenitic grades. AM 355 is used for blades, knives, industrial cutters, discs, rotors, shafts and in similar parts where high strength is required at intermediate elevated temperatures.

Chemical Composition Limits
Weight%	C	P	Si	Ni	N	Mn	S	Cr	Mo	Fe
AM 355	0.10 - 0.15	0.040 max	0.50 max	4 -5	0.07 - 0.13	0.50-1.25	0.030 max	15-16	2.5-3.25	Bal

Typical Mechanical Properties

Alloy	Test Temp	Specimen Orientation	Yield Strength 0.02% offset MPa	Yield Strength 0.2% offset MPa	Ultimate Tensile Strength MPa	Elongation in 2"(%)	Reduction of Area %	Rockwell C Hardness
AM 355 Bar	850°F	L	979	1255	1489	19	38	48
AM 355 Bar	850°F	T	1020	1276	1517	12	21
AM 355 Bar	1000°F	L	1014	1179	1276	19	57	40
AM 355 Bar	1000°F	T	1020	1165	1276	15	40

Greek Ascoloy

Greek Ascoloy is a hardenable chromium-nickel-tungsten martensitic alloy. Greek Ascoloy is designed for use in highly stressed parts at temperature up to 1200ºF (649ºC). It obtains deep hardening and has superior creep strength, resistance to tempering and stress-corrosion cracking together with the properties of the standard 12% chromium grades of stainless steel.

Chemical Composition Limits
Weight%	C	P	Si	Ni	W	Mn	S	Cr	Mo	Fe
Greek Ascoloy	0.15-0.20	0.040 max	0.50 max	1.80-2.20	2.5-3.5	0.50 max	0.030 max	12-14	0.50 max	Bal

Typical Mechanical Properties

Alloy	Test Temp		Yield Strength 0.2% offset		Ultimate Tensile Strength		Elongation in 2"(%)	Reduction of Area %
Alloy	°F	°C	ksi	MPa	ksi	MPa	Elongation in 2"(%)	Reduction of Area %
Greek Ascoloy	70	21	115	793	140.8	971	21	58
Greek Ascoloy	90	482	82	565	100	689	16	63
Greek Ascoloy	1000	538	70	483	84	579	22	74
Greek Ascoloy	1100	593	55	379	67	462	30	83
Specimens heat treated by hardening at 1750°F (954°C), oil quench followed by tempering at 1200°F (649°C), air cool

Alloy A286 (AMS 5731/ AMS 5732 / AMS 5737 / AMS 5525)

A286 is an iron-nickel-chromium alloy with additions of molybdenum and titanium. A 286 is one of the most popular high temperature alloys. As one of the austenitic alloys it maintains good strength and oxidation resistance at temperatures up to 1300ºF. Due to it's high strength and excellent fabrication characteristics A286 is used in various components of aircraft and industrial gas turbines. A286 is also widely used in the offshore oil and gas industry where the components are subject to high levels of heat and stress.

Chemical Composition Limits

Weight%

A286

0.08 max

2 max

0.025 max

1 max

13.5-16

24-27

1-1.5

1.9-2.35

0.10-0.50

0.35 max

0.0003-0.010

1 max

0.50 max

Typical Mechanical Properties

Alloy	0.2 Proof Stress (min)	Tensile Strength (min)	Elongation (min)
Alloy A286 Solution Treated and Aged (BS)	590 N/mm²	900 N/mm²	13%
Alloy A286 Solution Treated and Aged (AMS)	85 ksi (586 mpa)	130 ksi (896 mpa)	15%

Nitronic 40 /21-6-9 (AMS 5656 / AMS 5595)

Nitronic 40 (21-6-9) is a high-manganese nitrogen strengthened stainless steel. Nitronic 40 properties include high strength in the annealed condition, excellent resistance to corrosion at high temperatures, readily weldable and it can also be fabricated. Nitronic 40 is used in a numerous applications including aircraft engine components, chemical processing, pollution control equipment.

Chemical Composition Limits
Weight%	C	P	Si	Ni	Fe	Mn	S	Cr	N	Mo	Cu
Nitronic 40 (21-6-9)	0.04 max	0.060 max	1.00 max	5.5-7.5	Bal	8-10	0.030 max	19-21.5	0.15-0.40	0.75 max	0.75 max

Typical Mechanical Properties

Alloy	Cross Section Size	Test Direction	Yield Strength 0.2%		Ultimate Tensile Strength		Elongation in 2"(%)	Reduction of Area %	Rockwell B Hardness
Alloy	Cross Section Size	Test Direction	ksi	MPa	ksi	MPa	Elongation in 2"(%)	Reduction of Area %	Rockwell B Hardness
Nitronic 40 (21-6-9)	6" (152mm) sq	Longitudinal	62	428	95	655	46	69
Nitronic 40 (21-6-9)	6" (152mm) sq	Transverse	52	358	93	641	30	45
Nitronic 40 (21-6-9)	4" (102mm) sq	Longitudinal	56	386	97	668	53	73
Nitronic 40 (21-6-9)	1" (25.4mm)sq	Longitudinal	52	358	101	696	53	73	90

Nitronic 50 (XM19/ AMS 5764)

Nitronic 50 is a nitrogen-strengthened austenitic stainless steel that has properties that combine excellent strength, ductility, toughness, corrosion resistance and fabricability. Nitronic 50 is a very versitile and useful alloy due to it retaining its very good mechanical properties at both elevated and sub-zero temperatures. Also Nitronic 50 has outstanding corrosion resistance (greater than alloy 316 and 316L) and it is an effective alloy for use in the Petroleum, Chemical, Marine, Nuclear, Pulp and Paper, Textile, Food Processing industries.

Chemical Composition Limits

Weight%

Nb (Cb)

Nitronic 50

0.06 max

0.040 max

1.00

11.5-13.5

0.10-0.30

0.20-0.40

4-6

0.030 max

20.5-23.5

1.5-3.0

0.10-0.30

Bal

Typical Mechanical Properties

Alloy	Condition	Tensile of Strength (ksi)	Yield Strength (ksi)	Elongation (%)	Reduction of Area %	Hardness HRC
Nitronic 50	Annealed AMS 5764	100	55	35	55	>20
Material is annealed at 1065°C to 1120°C (1950°F to 2050°F)

Nitronic 60 (S21800 /AMS 5848)

Nitronic 60 is a high Silicon, high Manganese, Nitrogen strengthened austenitic stainless alloy. Nitronic 60 is an all purpose metal that was originally designed as a temperature alloy and therefore performs well at high temperature around 1800ºF. The additions of silicon and manganese assist to inhibit wear, galling and fretting even in the annealed condition. Through cold working Nitronic 60, it is possible to attain higher strengths, however it does not enhance the anti-galling properties. The oxidation resistance of Nitronic 60 is similar to Alloy 309 and far superior to Alloy 304. Nitronic 60 is used in the Aerospace , Food and Drug, Oil Field, Petrochemical, Surgical and Chemical Processing Industries.

Chemical Composition Limits
Weight%	Ni	Cr	Mn	Si	N	Mo	C
Nitronic 60	8-9	16-18	7-9	3.5-4.5	0.08-0.180	0.75 max	0.10 max

Typical Mechanical Properties

Alloy	Condition	Ultimate Tensile Strength (ksi)	Yield Strength (0.2%) ksi	Elongation in 4D (%)	Reduction of Area %	Hardness HB
Nitronic 60	Solution Treated (AMS 5848) <0.5"	105	55	35	55	170-255
Nitronic 60	Solution Treated (AMS 5848) >0.5"	95	50	35	55	170-255

Duplex Steel F51 (UNS S31803) / F60 (UNS 32205)

F51 Duplex Stainless Steel combines improved resistance to stress corrosion cracking, pitting, crevice corrosion and high strength. Due to it's chemical composition F51 duplex stainless steel resists chloride environments and sulphide stress corrosion.

Chemical Composition Limits
Weight%	C	Mn	P	S	Si	Cr	Ni	Mo	N
Duplex F51	0.03 max	2.0 max	0.03 max	0.02 max	1 max	21-23	4.5-6.5	2.5-3.5	0.80-0.20

Typical Mechanical Properties

Alloy	Tensile Strength N/mm²	Proof Strength 0.2% N/mm²	Elongation (%)	Hardness Brinell
F51	105	55	35	170-255
F51	95	50	35	170-255

Super Duplex Steel F53 (UNS S32750)

F53 is a high alloy duplex stainless steel. F53 has excellent resistance to pitting and crevice corrosion resistance compared with the ordinary austenitic or duplex types. Due to this F53 stainless steel is used primarily in highly corrosive conditions.

Chemical Composition Limits
Weight%	C	Mn	P	S	Si	Cr	Ni	Mo	N	Cu
Super Duplex F53	0.03 max	1.2 max	0.035 max	0.015 max	0.8 max	24-26	6-8	3-5	0.3	0.5 max

Typical Mechanical Properties

Alloy	Tensile Strength ksi	Proof Strength 0.2% ksi (min)	Elongation (%) (min)	Hardness Rockwell C
Super Duplex F53 Annealed Condition	110-135	80	15	28 max

Super Duplex Steel F55 (UNS S32760)

F55 Duplex is the most common super duplex grade it has an enhanced pitting and crevice corrosion resistance compared with the ordinary austenitic or duplex types.

Chemical Composition Limits
Weight%	C	Mn	P	S	Si	Cr	Ni	Mo	N	W
Super Duplex F55	0.03 max	1.00 max	0.03 max	0.01 max	1 max	24-26	4.5-6.5	3-4	0.25	0.08-0.20

Typical Mechanical Properties

Alloy	Tensile Strength N/mm²	Yield Strength 0.2% N/mm²	Elongation	Hardness HB
Super Duplex F55	860	720 min	16 min	270 max

Stainless Steel 254SMO Tube (Wst 1.4547/ UNS S31250)

17-4 PH is a martensitic, precipitation-hardening stainless steel that provides an outstanding combination of high strength and hardness along with excellent corrosion resistance. 17-4 PH has good fabricating characteristics and can be age hardened by a single step, low temperature treatment. 17-4 PH is a versatile material widely used in the aerospace, chemical, petrochemical, food processing, paper and general metalworking industries.

Chemical Composition Limits
Weight%	Cr	Ni	Mo	Cu	N	Mn	Si	S	C	P
254SMO	20	18	6-6.5	0.5-1.0	0.18-0.22	1 max	1 max	0.010 max	0.20 max	0.30 max

Typical Mechanical Properties

Alloy	Tensile Strength MPa	Yield Strength (0.2% Offset) MPa	Elongation (%)
254SMO	650-850	300	35

Alloy 904L (Wst 1.4539)

Alloy 904L is an austenitic stainless steel intended for use under severe corrosion conditions, with a very good resistance to attacks in acidic environment, as sulphuric, phosphoric and acetic acid. Very good resistance to pitting corrosion, stress corrosion cracking and a much better resistance to crevice corrosion than steels of alloy 304L and alloy 316L. Used for chemical processing, pollution control equipment, oil and gas well piping, heat exchangers, acid production and pickling equipment.

Chemical Composition Limits
Weight%	Ni	Cr	Mo	Cu	Mn	Si	S	C	N
904L	23-28	19-23	4-5	1-2	2 max	1 max	0.035 max	0.020 max	0.10 max

Typical Mechanical Properties

Alloy	Tensile Strength MPa	Yield Strength (0.2% Offset) MPa	Elongation (%)
Alloy 904L Tube	500-700	200	40

4130 (AMS 6345/ AMS 6346 / AMS 6350)- Chrome-Moly Aircraft Steel

Alloy 4130 (AISI 4130) is a chromium molybdenum alloy steel being a widely used Aircraft Steel due to its weldability, ease of fabrication and mild hardenability. The hardenability and weldability of Alloy 4130 are considered equivalent to 8630 (MIL-S-6250) . Alloy 4130 is also vacuum degassed to meet the magnetic particle inspection standards of AMS 2301.

Chemical Composition Limits
Weight%	C	Mn	P	S	Si	Cr	Ni	Mo	Cu
4130 Bar/Tube	0.28 - 0.33	0.40-0.60	0.025 max	0.025 max	0.15 - 0.35	0.80-1.10	0.25 max	0.15-0.25	0.35
4130 Sheet/Plate	0.28 - 0.33	0.40 - 0.60	0.025 max	0.025 max	0.20-0.35	0.80-1.10	-	0.15 - 0.25	-

Typical Mechanical Properties

Alloy	Condition	Thickness	Tensile Strength ksi	Yield Strength ksi	Elongation	Hardness
Tube AMS 6371	Cold Drawn	-	95	70	12	<25
Bar AMS 6370	Annealed	-	-	-	-	29HB Max
Bar AMS 6346	Hardened & Tempered	-	125	100	17	-
Sheet AMS 6350	Annealed	-	-	-	-	<25 HRC
Sheet AMS 6345	Normalised	<0.062"	95	75	8	-
Sheet AMS 6345	Normalised	0.062" - 0.125"	95	75	10	-
Sheet AMS 6345	Normalised	0.125" - 0.187"	95	75	12	-
Sheet AMS 6345	Normalised	0.187" - 0.250"	90	70	15	-
Sheet AMS 6345	Normalised	0.250" - 0.750"	90	70	16	-
Sheet AMS 6345	Normalised	0.750" - 1.500"	90	70	18	-
Sheet AMS 6345	Normalised & Heat Treated	0.249" - 0.375"	-	-	-	42
Sheet AMS 6345	Normalised & Heat Treated	0.375" - 0.500"	-	-	-	38
Sheet AMS 6345	Normalised & Heat Treated	0.500" - 0.625"	-	-	-	32
Sheet AMS 6345	Normalised & Heat Treated	0.625" - 0.750"	-	-	-	29
Sheet AMS 6345	Normalised & Heat Treated	0.750" - 0.875"	-	-	-	27
Sheet AMS 6345	Normalised & Heat Treated	0.875" - 1.500"	-	-	-	26

Aircraft Alloy Steel AISI 4140 (AMS 6349/ AMS 6382)

Alloy 4140 (AISI 4140) is a low alloy steel containing Chromium and Molybdenum. Alloy 4140 is the most widely used alloy for oil patch applications. Usually supplied hardened and tempered to condition T in sections up to 100mm with a tensile strength of 850 - 1000MPa and aiming for this strength range in larger sections. Alloy 4140 (AISI 4140) offers a very good balance of strength, toughness and wear resistance. Other typical applications are axles, conveyor parts, crow bars, gears, logging parts, spindles, shafts, pump shafts, sprockets, studs, pinions, rams, ring gears.

Chemical Composition Limits
Weight%	C	Si	Mn	Cr	Mo
4140 Ann	0.40	0.25	0.85	1.00	0.25
4140 Normalised	0.40	0.25	0.85	1.00	0.25

Typical Mechanical Properties

Alloy	Section mm	Yield Strength MPa	Tensile Strength MPa	Elongation %	Izod J	Hardness HB
Alloy 4140	50	770	930	17	90	275
Alloy 4140	100	710	920	15	70	270
Alloy 4140	200	570	850	14	60	250

Aircraft Alloy Steel AISI 4330 Mod Vac Melt (AMS 6411/ AMS 6427)

Alloy 4330V is a NiCrMoV hardened and tempered high strength alloy steel for applications in the oil, gas and aerospace industries. Alloy 4330V is an high strength alloy that has exceptional low temperature impact properties. Alloy 4330V is used in the oil industry for oil tools and drill jar and in the aerospace industry for bolting, air frames etc.

Chemical Composition Limits
Weight%	C	Si	Mn	P	S	Cr	Mo	Ni	V
4330V	0.30-0.34	0.15-0.35	0.75-1.00	0.025 max	0.010 max	0.75-1.00	0.40-0.50	1.65-2.00	0.05-0.10

Typical Mechanical Properties

Alloy	0.2% PS (ksi)	UTS (ksi)	Elongation (%)	Reduction of area (%)	Charpy V Notch@ room temp (ft lbs)	Charpy V Notch @ -50°F (ft lbs)
Alloy 4330 Grade A	115	130	16	50	65	50
Alloy 4330 Grade B	135	150	14	45	50	30
Alloy 4330 Grade C	150	165	12	40	40	15

Aircraft Alloy Steel AISI 4340 / E-4340

Alloy E 4340 is a widely used deep-hardening constructional steel. Due to E-4340's high alloy content it obtains a uniformed hardness by heat treatment. The high fatigue strength makes E4340 ideal for highly stress parts as it maintains it's strength and hardness at elevated temperatures.

Chemical Composition Limits
Weight%	C	Mn	P & S	Si	Cr	Ni	Mo
E4340 Bar	0.38 - 0.43	0.65 - 0.85	0.025	0.15-0.30	0.70-0.90	1.65-2.00	0.20-0.30
E4340 Plate	0.38-0.43	0.60-0.80	0.025	0.15-0.35	0.70-0.90	1.65-2.00	0.20-0.30

Typical Mechanical Properties

Alloy	Condition	Tensile Strength ksi	Yield Strength ksi	Elongation 4D %	Reduction of Area %	Hardness HB
Alloy Steel E4340 Bar	Annealed	-	-	-	-	235 max
Alloy Steel E4340 Bar	Hardened and Tempered	260	217	10	30	-

Aircraft Alloy Steel AISI 4620 Vac Melt (AMS 6294)

Alloy 4620 Vac Melt is a nickel, molybdenum, maganese low alloy steel. Alloy 4620 Vac Melt has very good combination of strength and toughness and can be heat treated to high strength levels, also alloy 4620 has good machinability.

Chemical Composition Limits
Weight%	C	Mn	Si	P	S	Ni	Mo	Cr	Cu
AMS 6294	0.17-0.22	0.45-0.65	0.15-0.35	0.025 max	0.025 max	1.65-2.00	0.20-0.30	0.20 max	0.5 max

Bearing Steel AISI 52100 (AMS 6440 / AMS 6444)

Alloy 52100 Var-Arc (LESCALLOY®) is a deep hardening alloy steel. Alloy 52100 is generally used for aircraft bearings and in other high stressed parts where good rolling contact fatigue strength is required at operating temperatures below 400°F.

Chemical Composition Limits
Weight%	C	Mn	Si	Cr
Alloy 52100 Vac Arc	1.05	0.35	0.30	1.50

Aircraft Steel AISI 6150 Vac Melt (AMS 6448)

Alloy 6150 is a fine grained, highly abrasion resistant carbon-chromium alloy steel. Very good shock resistance and toughness are also key properties of this alloy in the heat treated condition. Alloy 6150 Commonly employed in heavily stressed machinery parts including shafts, gears, pinions and also in hand tool components.

Chemical Composition Limits
Weight%	C	Mn	Si	P	S	Cr	V	Ni	Mo	Cu
AMS 6448	0.48-0.53	0.70-0.90	0.15-0.35	0.025 max	0.025 max	0.80-1.10	0.15-0.30	0.25 max	0.06 max	0.35 max

Aircraft Steel AISI 8740 (AMS 6322)

Alloy 8740 is a Nickel-chromium-molybdenum steek that is used in the aircraft and aerospace industries . Alloy 8740 is commonly called AISI 8740.

Chemical Composition Limits
Weight%	C	Mn	Si	P	S	Cr	Ni	Mo	Cu
AMS 6322	0.38-0.43	0.75-1.00	0.15-0.35	0.025 max	0.025 max	0.40-0.60	0.40-0.70	0.20-0.30	0.35 max

Aircraft Steel 9-4-30 Vac Melt (AMS 6526)

Alloy 9-4-30 Vac Melt N&T (LESCALLOY HP 9-4-30 VAC ARC ®) is a low alloy, high strength steel with a high nickel and cobalt content to promote toughness. Alloy 9-4-30 Vac Melt N&T was designed to have high hardenability together with good weldability and excellent fracture toughness. Alloy 9-4-30 Vac Melt N&T is used in aircraft structural components, rocket motor cases, armor plate, pressure vessels and gears.

Chemical Composition Limits
Weight%	C	Mn	Si	Cr	V	Mo	Ni	Co
9-4-30 Vac Melt N&T	0.30	0.30	0.10	1.00	0.10	1.00	7.50	4.50

Typical Mechanical Properties

Material	RCS Billet Size mm	0.2 % Yield Strength (Mpa)	Ultimate Tensile Strength (Mpa)	% Elongation	% Reduction of Area
LESCALLOY HP 9-4-30 VAC ARC ®	343	1300	1580	14.7	50.3
LESCALLOY HP 9-4-30 VAC ARC ®	343	1260	1590	14.0	45.9
LESCALLOY HP 9-4-30 VAC ARC ®	146	1340	1600	15.0	52.5
LESCALLOY HP 9-4-30 VAC ARC ®	146	1310	1590	15.0	51.7
Actual center transverse mechanical properties

Aircraft Steel AISI 9310 (AMS 6260 / AMS 6265 / AMS 6267)

Alloy 9310 Vac-Arc (LESCALLOY 9310 VAC ARC ®) is a carburizing steel which has high hardenability, high core hardness together with high fatigue strength. The premium quality of alloy 9310 make it ideally suited for critical aircraft engine gears.

Chemical Composition Limits
Weight%	C	Mn	Si	Ni	Cr	Mo
9310	0.10	0.50	0.25	3.25	1.20	0.12

Typical Mechanical Properties

Material	Heat Treatment	Ultimate Tensile Strength (Mpa)	Yield Strength (Mpa)	% Elongation	% Reduction of Area	Core Hardness
LESCALLOY 9310 VAC ARC ®	A	1289	1117	15	51	375
LESCALLOY 9310 VAC ARC ®	B	1069	896	15.5	52	331
LESCALLOY 9310 VAC ARC ®	C	1207	1069	16	53	363
Typical Core Properties
Heat Treatments A - Pseudo carburized at 1700°F (927°C) for 8 hours and oil quenched. Tempered at 300°F (149°C) for 2 hours B - Pseudo carburized at 1700°F (927°C) for 8 hours and slow cooled to room temperature. Heated to 1425°F (774°C) and oil quenched. Tempered at 300°F (149°C) for 2 hours C - Pseudo carburized at 1700°F (927°C) for 8 hours and slow cooled to room temperature. Heated to 1525°F (829°C) and oil quenched. Tempered at 300°F (149°C) for 2 hours

Aircraft Steel D-6AC Vac Melt (AMS 6431)

Alloy D6AC Vac Melt N&T (LESCALLOY D6AC VAC ARC ®) is a medium carbon, low alloy steel. Alloy D6AC has ultra high strength and is designed for use in high strength structural applications (strength levels up to 280,000 psi). Alloy D6AC also is know for its high yield strength to tensile strength ratio, combined with good ductility. Due to alloy D6AC deep hardening characteristics it makes it applicable for fairly large sections.

Chemical Composition Limits
Weight%	C	Si	Mn	Cr	Ni	Mo	V
D-6AC Vac Melt N&T	0.46	0.25	0.75	1.10	0.60	1.00	0.10

Typical Mechanical Properties

Material	Tempering Treatment	Ultimate Tensile Strength (Mpa)	0.2 % Yield Strength (Mpa)	% Elongation	% Reduction of Area	Hardness HRC
LESCALLOY D6AC VAC ARC ®	316°C (600°F)	1931	1724	7	23	53
LESCALLOY D6AC VAC ARC ®	510°C (950°F)	1572	1345	7	25	46
Heat Treatment before temper. A ustenitized at 1650°F (899°C). Oil quenched and air cooled, or salt quenched at 400-425°F (204-218°C) for ten minutes and air cooled

Alloy Steel H-11 (AMS 6485 / AMS 6487 / AMS 6488)

Alloy H-11 (DYNAFLEX VAC-ARC®) is a medium alloyed steel with a relatively low carbon content. H-11 has good toughness and deep hardens by air quench from heat treatment. H-11 ultra high strength grade makes it idea for structural applications such as aircraft landing gear. It resists softening at temperatures up to 1000 F while retaining good ductility and toughness even at strength levels on the order of 275 ksi.

Chemical Composition Limits
Weight%	C	Mn	Si	Cr	Mo	V
DYNAFLEX VAC-ARC®	0.40	0.30	0.90	5.00	1.30	0.50

Typical Mechanical Properties

Material	Orinentation	Ultimate Tensile Strength (Mpa)	0.2 % Yield Strength (Mpa)	% Elongation	% Reduction of Area
DYNAFLEX VAC-ARC®	Longitudinal	1793	1482	8	30
Austenitize at 1800°F (1010°C) for 15-45 minutes and air cool Temper three times for 2-3 hours at a temperature not lower than 1000°F (538°C) and air cool

Aircraft Steel HY-TUF Vac Melt (AMS 6418 / AMS 6425)

LESCALLOY HY-TUF VAC ARC® is a high strength low alloy steel. within the tensile range 220/240 ksi (1517/1655MPa) LESCALLOY HY-TUF VAC ARC has good ductility, fracture toughness and impact strength. HY-TUF is most commonly used for aircraft landing gear, flap tracks and other structural applications.

Chemical Composition Limits
Weight%	C	Mn	Si	Ni	Cr	Mo
LESCALLOY HY-TUF VAC-ARC®	0.25	1.35	1.50	1.80	0.30	0.40

Typical Mechanical Properties

Material	Orinentation	Ultimate Tensile Strength (Mpa)	0.2 % Yield Strength (Mpa)	% Elongation	% Reduction of Area
LESCALLOY HY-TUF VAC ARC®	Transverse	1517	1276	5	30
Typical Transverse specification limits after the following heat treatments 1725°F (940 °C), one hour, air cool 1600°F (871°C), one hour, oil quench 550°F (288°C), two hours, air cool

Aircraft Steel 135 Mod / Nitriding (AMS 6470 / AMS 6472 / AMS 6471)

NITRALLOY 135™Modified VAC-ARC is a low alloy nitriding grade of steel with moderate hardenability. As will all nitriding steels NITRALLOY 135™Modified VAC-ARC provides a high case hardness without affecting the core properties of the metal. NITRALLOY 135™Modified VAC-ARC is generally used for aircraft gears, shafts, pinions, crankshafts, cams, camshafts and bolts.

Chemical Composition Limits
Weight%	C	Mn	Si	Cr	Mo	Al
NITRALLOY 135™Modified VAC-ARC	0.40	0.60	0.30	1.60	0.35	1.20

Typical Mechanical Properties

Material	Size in Section cm	Ultimate Tensile Strength (Mpa)	Yield Strength (Mpa)	% Elongation	% Reduction of Area	Hardness HBW
NITRALLOY 135™Modified VAC-ARC	3.8	930	690	16	50	280-340
NITRALLOY 135™Modified VAC-ARC	3.8-7.6	860	620	15	40	280-340 on surface 269-321 on test specimen
NITRALLOY 135™Modified VAC-ARC	7.6-12.7	760	580	15	40	269-321 on surface 240-300 on test specimen

Aircraft Alloy Steel 300M / AISI E4340 Mod (AMS 6417 / AMS 6419)

Alloy Steel 300M VAR is similar to 4340 with the addition of vanadium and a higher silicon content. Alloy 300M offers a combination of toughness and ductility at high strength levels without an increased carbon content. Alloy 300M VAR is Vacuum arc-remelted for excellent purity. 300M can also be supplied dual certified to the British aerospace standard BS 5155.

Chemical Composition Limits
Weight%	C	Mn	P & S	Si	Cr	Ni	Mo	V	Cu
300M VAR	0.38 - 0.45	0.60-0.90	0.010	1.45-1.80	0.70-0.95	1.65-2	0.30-0.50	0.05-0.10	0.35

Typical Mechanical Properties

Alloy	Condition	Tensile Strength ksi	Yield Strength ksi	Elongation %	Reduction of Area %	Hardness HB
Alloy AMS 6417 Bar	Normalised/Tempered	-	-	-	-	311 max
Alloy AMS 6417 Bar	Hardened/ Tempered & Heat Treated	270	220	8	30	-
Alloy AMS 6419 Bar	Normalised/Tempered	-	-	-	-	311 Max
Alloy AMS 6419 Bar	Normalised/Tempered & Heat Treated	280	230	7	25	-

Alloy 15CDV6

Alloy 15CDV6 is a low carbon steel which combines a high yield strength (superior to SAE 4130) with good toughness and weldability. 15CDV6 can be readily welded with very little loss of properties during welding and without the need for further heat treatment. This alloy finds many applications in the aerospace and motorsports industries in such components as roll cages, pressure vessels, suspensions, rocket motor casings, wish bones and subframes.

Chemical Composition Limits
Weight%	C	P	Si	V	Mn	S	Cr	Mo	Fe
Alloy 15CDV6	0.12-0.18	0.020 max	0.20 max	0.20-0.30	0.08-1.1	0.015 max	0.25-1.5	0.80-1.00	Bal

Typical Mechanical Properties

Alloy	Condition	Tensile Strength MPa	Yield Strength MPa	Elongation %	Hardness HB
Alloy 15CDV6	1.7734.2 (ann)	-	-	-	197
Alloy 15CDV6	1.7734.4	700	550	13	207
Alloy 15CDV6	1.7734.5	980-1180	790	11	293-352
Alloy 15CDV6	1.7734.6	1080-1250	930	10	321-363

Alloy 35NCD16 (AIR 9160C)

35NCD16 is a low alloy steel which combines high strength and hardenability with good dimensional stability, making it an excellent alloy for large section mechanical parts or tooling of complex shapes subject to high stressses. In addition to aerospace structural applications, it is also suitable for mould for Distributor and Stockist plastic materials and bolster for drop stamps. 35NCD16 is supplied in either the Normalised & Tempered or Hardened & Tempered condition, but can also be heat treated with an additional sub-zero stage for increased strength and hardness.

Chemical Composition Limits
Weight%	C	Si	Mn	S	P	Cr	Ni	Mo
Alloy 35NCD16	0.30-0.40	0.15-0.40	0.30-0.60	0.02 max	0.025	1.60-2.00	3.50-4.20	0.25-0.60

Typical Mechanical Properties

Alloy	Condition	Tensile Strength MPa	Yield Strength MPa	Elongation %	Reduction of Area %	Hardness
35NCD16	Annealed	-	-	-	-	269 HB max
35NCD16	Normalised & Tempered	1000*	850*	19*		295 HB max
35NCD16	Hardened & Tempered	1230-1380	1030 min	10	40	363-415 HB
35NCD16	Harden, Sub zero & Tempered	1760-2010	1420 min	6	35	48 HRC min
* Typical properties only

Alloy 20 (20Cb-3)

Alloy 20 (20Cb-3) is an austenitic stainless steel which was designed for maximum resistance to acid attacks and as such has excellent resistance to hot sulfuric acid. Alloy 20 is also resistant to intergranular corrosion in the as-welded condition. At 33% nickel, Alloy 20 has practical immunity to chloride stress corrosion cracking. Alloy 20 is used is a wide variety of applications from Sulfuric acid pickling tanks, racks and heating coil, Heat Exchangers, Process piping, Chemical and petroleum process equipment etc.

Chemical Composition Limits
Weight%	Ni	Cr	Mo	Mn	Cu	Si	C	S	P	Cb + Ta	Fe
Alloy 20 20Cb-3	32.5-35.0	19-21	2-3	2 max	3-4	1 max	0.06 max	0.035 max	0.035 max	8 X 1.0	Bal

Typical Mechanical Properties

Alloy	Ultimate Tensile Strength MPa	0.2 % Yield Strength MPa	Elongation %	Hardness MAX HRC (Brinell)
Alloy 20	551.6	241.3-	30	19 (217)