... hardness, and bright surface or black surf Hss Rod W2Mo9Cr4VCo8/SKH59/M42/1.3247Specification D10mm --- D60mm Delivery Condition: hardness ... (GB), it is similar to M2( ASTM), S6-5-2(DIN), SKH51(JIS) . 4Cr5MoSiV1 (GB), it is similar to ... 0.030, S≤0.030, Cr 4.10, W 6.00, Mo 4.80 V 1.85 Annealed Hardness: HB≤255 Heat ... Cr 7.10, W ≤0.50,Mo 2.10, V 1.80 Annealed Hardness: HB≤255 Heat treatment temp: ...