... : Diameter 8mm---32mm Precisely-forged round bar: Diamet hss and die steel round bar Cr12Mo1V1/D2/1.2379Hot ... W6Mo5Cr4V2 (GB), it is similar to M2( ASTM), S6-5-2(DIN), SKH51(JIS)Chemical Composition: C 0.85, ... W6Mo5Cr4V2 (GB), it is similar to M2( ASTM), S6-5-2(DIN), SKH51(JIS)Chemical Composition: C 0.85, ... W6Mo5Cr4V2 (GB), it is similar to M2( ASTM), S6-5-2(DIN), SKH51(JIS)Chemical Composition: C 0.85, ...