42CrMo4(1.7225) Alloy Structural Steel
Implementation standard: EN 10083/1-1991
Characteristics: 42CrMo4 has high strength, hardenability, good toughness, small deformation during quenching, and high creep strength and durable strength at high temperature.
Chemical composition
Carbon C: 0.38-0.45
Silicon Si: ≤ 0.40
Mn: 0.60-0.90
Sulfur S: Allowable Residual Content ≤0.035
Phosphorus p: allowable residual content ≤0.035
Cr: 0.90-1.20
Mo: 0.15-0.30
< 42crmo 4 standard control:
China GB 42CrMo, Russia ГOCT 38XM, us AISI 4140/4142, UK BS 708M40/708A42/709M40, France NF 40CD4/42CD4, Germany DIN 41CrMo4/42CrMo4, Japan JIS SCM4, international ISO 683/1 3
Mechanical properties
Tensile strength σ b (MPa): ≥ 1080 (110)
Yield strength σ s (MPa): ≥ 930 (95)
Elongation Δ 5 (%): ≥ 12
Section shrinkage Ψ (%): ≥ 45
Akv (j) of impact power: ≥ 63
Impact toughness value αkv (J/cm² ):≥78(8)
Hardness: ≤217HB
Sample size: the sample blank size is 25 mm.