Chemical Composition: Carbon C: 0.17 ~ 0.23 ,Si Si: 0.17 ~ 0.37 ,Manganese Mn: 0.60 ~ 0.95 ,S S: to allow the residual content ≤ 0.035 ,P P: ≤ 0.035 to allow the residual content ,Chromium Cr: 0.40 ~ 0.70 ,Ni-Ni: 0.35 ~ 0.75 ,Copper Cu: ≤ 0.030 to allow the residual content ,Mo Mo: 0.20 ~ 0.30
Mechanical Properties:
Tensile strength σb (MPa): ≥ 980 (100)
Yield strength σs (MPa): ≥ 785 (80)
Elongation δ5 (%): ≥ 9
Reduction of area ψ (%): ≥ 40
Impact energy Akv (J): ≥ 47
Impact toughness αkv (J/cm2): ≥ 59 (6)
Hardness: ≤ 197HB
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