... , 738H, 718, 8407, S136, NAK80, P20, KD-61, NIMAX etc ;3,Hardness of the steel : 20-60HRC ;4,Cavity:Single-cavity ... ,22 Years' Professional Manufacture Experience, Specialize in design and the manufacture of Plastic Injection Mould and tooling for Automotive, Electronic equipment, Medical Products, Double ...