... Composition: C 0.39, Si 1.10, Mn 0.30, P≤0.028, S≤0.020, Cr 5.10, W ≤0 ... .30,Mo 1.35, V 0.90Annealed Hardness: HB≤235Heat treatment temp: Hardening 1020 ... )Chemical Composition: C 0.85, Si 0.38, Mn 0.35, P≤0.030, S≤0.030, Cr 4.10, W 6 ... Composition: C 0.74, Si 1.10, Mn 0.45, P≤0.030, S≤0.030, Cr 7.10, W ≤0 ...