Sunday, March 19, 2017

Steel designation letters

Carbon steels10XXPlain carbon, Mn 1.00% max
11XXResulfurized free machining
12XXResulfurized/rephosphorized free machining
15XXPlain carbon, Mn 1.00-1.65%
Manganese steels13XXMn 1.75%
Nickel steels23XXNi 3.50%
25XXNi 5.00%
Nickel-chromium steels31XXNi 1.25%, Cr 0.65-0.80%
32XXNi 1.75%, Cr 1.07%
33XXNi 3.50%, Cr 1.50-1.57%
34XXNi 3.00%, Cr 0.77%
Molybdenum steels40XXMo 0.20-0.25%
44XXMo 0.40-0.52%
Chromium-molybdenum steels41XXCr 0.50-0.95%, Mo 0.12-0.30%
Nickel-chromium-molybdenum steels43XXNi 1.82%, Cr 0.50-0.80%, Mo 0.25%
47XXNi 1.05%, Cr 0.45%, Mo 0.20-0.35%
Nickel-molybdenum steels46XXNi 0.85-1.82%, Mo 0.20-0.25%
48XXNi 3.50%, Mo 0.25%
Chromium steels50XXCr 0.27-0.65%
51XXCr 0.80-1.05%
50XXXCr 0.50%, C 1.00% min
51XXXCr 1.02%, C 1.00% min
52XXXCr 1.45%, C 1.00% min
Chromium-vanadium steels61XXCr 0.60-0.95%, V 0.10-0.015%
Tungsten-chromium steels72XXW 1.75%, Cr 0.75%
Nickel-chromium-molybdenum steels81XXNi 0.30%, Cr 0.40%, Mo 0.12%
86XXNi 0.55%, Cr 0.50%, Mo 0.20%
87XXNi 0.55%, Cr 0.50%, Mo 0.25%
88XXNi 0.55%, Cr 0.50%, Mo 0.35%
Silicon-manganese steels92XXSi 1.40-2.00%, Mn 0.65-0.85%, Cr 0-0.65%
Nickel-chromium-molybdenum steels93XXNi 3.25%, Cr 1.20%, Mo 0.12%
94XXNi 0.45%, Cr 0.40%, Mo 0.12%
97XXNi 0.55%, Cr 0.20%, Mo 0.20%
98XXNi 1.00%, Cr 0.80%, Mo 0.25%

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