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Nickel & High Temperature Alloys

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Special Products

 

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"

 

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 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)

BS S98, along with S99 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 for machining, in the finally heat treated and cold drawn/groun condition, designated BS S98D. Other conditions are S98B (black bar for machining, finally heat treated), S98A (billets for forging, softened) and S98C (forgings, finally heat treated).

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 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 - -