... H13 (ASTM), 1.2344(DIN), SKD61(JIS)Chemical Composition: C 0.39, Si 1.10, Mn 0. ... ( ASTM), S6-5-2(DIN), SKH51(JIS)Chemical Composition: C 0.85, Si 0.38, Mn 0. ... knives and durable cold working molds5. 7Cr7Mo2V2Si (GB)Chemical Composition: C 0.74, Si 1.10, Mn 0. ... 530Secondary 61-63 HRCApplication: Steel for pressing mold, extrusive mold and tensile mold cold work die steel/Cr12MoV/mould steel/tool steel