The 20CrMo chemical composition and mechanical properties

    ● Chemical Composition:
Carbon C: 0.17 ~ 0.24
Silicon Si: 0.17 ~ 0.37
Manganese Mn: 0.40 ~ 0.70
Sulfur S: allow the residual content ≤ 0.035
Phosphorus P: allow the residual content ≤ 0.035
Chromium Cr: 0.80 ~ 1.10
Ni: to allow the residual content ≤ 0.030
Cu: to allow the residual content ≤ 0.030
Molybdenum Mo: 0.15 ~ 0.25
● mechanical properties:
Tensile strength σb (MPa): ≥ 885 (90)
Yield strength σs (MPa): ≥ 685 (70)
Elongation δ5 (%): ≥ 12
Reduction of area ψ (%): ≥ 50
Impact energy Akv (J): ≥ 78
Impact toughness value of alpha kv (J/cm2): ≥ 98 (10)
Hardness: ≤ 197HB
Sample size: Sample blank dimensions of 15mm