... mould steel SKD61 is a very good strength, toughness and heat balance of hor steel, in recent years, with isotropoc ... good overall sclerosing5 good high strength6 when the extremely low heat treatment deformation and compared with the traditional steel, SKD61 has ... aluminum bronze magnessium compoession molding mould; 4, plastic mould and cold, heat, trimming tightening ring and wear-resistant parts.