... ,2312,P20 ), etcMaterial main core and cavity insertDIN2312,2738,2344,718,S136,8407,NAK80,SKD61,H13, etcHardness of steel46~56HRCMaterial for ... use the mould steel such as:S45C,S50C,P20,S136H,718,718H,2738,2316,2083,2311,NAK80,H13,etc.4.What ...