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42CrMo chemical composition
- Jan 04, 2019 -

LUOYANG SOPHIA HEAVY MACHINERY CO.,LTD https://www.lyshmac.com/


An alloy steel 42CrMo

China Executive Standard GB/T 3077-1999 42crmo picture

Its corresponding international standard organization number: 42CrMo4

Corresponding Japanese brand: SCM440

Corresponding to the German brand: 42CrMo4 or 1.7225

Approximate to the US brand: 4140 or G41400

chemical composition

Carbon C: 0.38 to 0.45%

Silicon Si: 0.17~0.37%

Manganese Mn: 0.50 to 0.80%

Sulfur S: Allowable residual content ≤0.035%

Phosphorus P: Allowable residual content ≤0.035%

Chromium Cr: 0.90 to 1.20%

Nickel Ni: Allowable residual content ≤0.030%

Copper Cu: Allowable residual content ≤0.030%

Molybdenum Mo: 0.15 to 0.25% [1]

Mechanical properties

Tensile strength σb (MPa): ≥ 1080 (110)

Yield strength σs (MPa): ≥ 930 (95)

Elongation δ5 (%): ≥12

Area shrinkage ψ (%): ≥ 45

Impact work Akv (J): ≥ 63

Impact toughness value αkv (J/cm2): ≥78(8)

Hardness: ≤217HB[1]