bosheng steel company mainly export die steel ，we sale plactic mould steel, hot working steel,cold working steel,steel genus: AISI :P20,420,H13,O1,D2,M2,1050;DIN :1.2311,1.2738,1.2316,1.2083,1.2344,1.2510,1.2739,1.3344;JIS :SUS420J2,SKD61,SKS3,SKD11,SKD1,SKH51,S50C