the round steel bar can be used to make mould,cutting tools,and so on. SpecificationsHot-rolled Round barH13, M2, W9, W4. Annealed ... S≤0.030, Cr 7.10, W ≤0.50,Mo 2.10, V 1.80Annealed Hardness: HB≤255Heat treatment temp: ... 0.028, S≤0.020, Cr 5.10, W ≤0.30,Mo 1.35, V 0.90Annealed Hardness: HB≤235Heat treatment ... S≤0.030, Cr 4.10, W 6.00, Mo 4.80 V 1.85Annealed Hardness: HB≤255Heat treatment temp: ...