Chemical composition and mechanical properties of 42CrMo4

Hit：282025-12-19 10:15:11　

Chemical composition of 42CrMo4
Carbon C: 0.38~0.45
Silicon Si: ≤ 0.40
Manganese Mn: 0.60~0.90
Sulfur S: allowable residual content ≤ 0.035
Phosphorus P: allowable residual content ≤ 0.035
Chromium Cr: 0.90~1.20
Nickel Ni: allowable residual content ≤ 0.030
Copper Cu: allowable residual content ≤ 0.030
Molybdenum Mo: 0.15~0.30
Mechanical properties of 42CrMo4
  
Tensile strength σ b (MPa): ≥ 1080 (110)
Yield strength σ s (MPa): ≥ 930 (95)
Elongation rate δ 5 (%): ≥ 12
Shrinkage rate of cross-section (%): ≥ 45
Impact energy Akv (J): ≥ 63
Impact toughness value α kv (J/cm²): ≥ 78 (8)
Hardness: ≤ 217HB
Sample size: The sample blank size is 25mm