... 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 ... 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 ... 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 ...