Alloy steel
30CrMoA chemical composition:
Carbon C: 0.26 ~ 0.34
Si Si: 0.17 ~ 0.37
Manganese Mn: 0.40 ~ 0.70
Sulfur S: allow the residual content ≤ 0.025
Phosphorus P: allow the residual content ≤ 0.025
Chromium Cr: 0.80 ~ 1.10
Ni: to allow the residual content of ≤ 0.030
Copper Cu: allow the residual content ≤ 0.025
Mo Mo: 0.15 ~ 0.25
Mechanical properties:
Tensile strength σb (MPa): ≥ 930 (95)
Yield strength σs (MPa): ≥ 735 (75)
Elongation δ5 (%): ≥ 12
Reduction of area ψ (%): ≥ 50
Impact energy Akv (J): ≥ 71
Impact toughness αkv (J/cm2): ≥ 88 (9)
Hardness: ≤ 229HB