Steel is an alloy of iron that contains a small amount of carbon, much less than cast iron and usually less than 1.7%. In general the tightly controlled carbon content determines how easily the steel can be hardened by heat treatments.
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Nearest Equivalent Specification |
Available Products |
S82 » |
A 4% Nickel-Chromium-Molybdenum case hardening steel generally available in bars and forgings. For aircraft engineering, defence and autosport applications. A single melt version of S156. Tensile strength 1320 to 1520 MPa. |
BS
W.Nr
AFNOR |
835M15 (EN39B)
1.6722/3
16NCD17 |
S95
BS
AFNOR |
817M40 (EN24)
40NCD7 |
A direct hardening 1½% Nickel-Chromium-Molybdenum steel with high tensile strength and excellent toughness. Well suited to applications where high mechanical properties are required. |
S97
W.Nr
BS |
1.6743
826M31 (EN25) |
A 2½% Nickel-Chromium-Molybdenum steel well suited to large forgings and similar components. Tensile strength(Rm) 1020-1180 N/mm2. |
S98
W.Nr
BS |
1.6745
826M40 (EN26) |
A 2½% Nickel-Chromium-Molybdenum high carbon steel generally available in bars and forgings. Tensile strength(Rm) 1180-1340 N/mm2. |
S99
W.Nr
BS |
1.6745
826M40 (EN26) |
A 2½% Nickel-Chromium-Molybdenum high carbon steel generally available in bars and forgings. Tensile strength(Rm) 1230-1420 N/mm2. |
S106
W.Nr
AFNOR
BS |
1.7365
30CD12
722M24 (EN40B) |
A medium strength 3% Chromium-Molybdenum nitriding steel that has high surface hardness after heat treatment. Primarily used in the aerospace sector but also used in motorsport for shaft/crankshaft applications. |
S132 » |
A 3% Cr-Mo-V nitriding steel. Offers high strength and develops a hard wear resistant case after surface treatment. Generally available in bars and forgings for gearbox shafts and crankshafts. |
W.Nr
AFNOR
BS |
1.8523
40CDV12
897M39 (EN40C) |
S140
BS |
826M31 (EN25) |
A 2½% Nickel-Chromium-Molybdenum steel. Tensile strength(Rm) 1080-1280 N/mm2. |
S154
W.Nr
BS |
1.6743
826M31 (EN25) |
A 2½% Nickel-Chromium-Molybdenum steel generally available in bars and forgings. Tensile strength(Rm) 880-1080 N/mm2. |
S155 »
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Ni-Si-Cr-Mo-V (VAR). Steel bar and forgings. British Standard aerospace grade. Vacuum arc remelted, through hardenable steel. For aircraft, defence and autosport components. |
4340M
300M
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S156 » |
A 4% Nickel-Chromium-Molybdenum case hardening steel generally available in bars and forgings. For aircraft engineering, defence and autosport applications. A VAR version of S82. |
W.Nr
BS
AFNOR |
1.6722/3
835M15 (EN39B)
16NCD17 |
Engineering
Steels |
See Engineering Steels, Maraging Steel and Special Steels. |
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