injection screw barrel screw diameter Φ 20mm-220mm mould clamping force 250T-3200T shot weight 30G-30000G Alloy-steel of high-quality 1.38 CrMoAIA(JIS SACM645) 2.42CrMo(AISI4140) 3.9Cr18MoV 4.CW6Mo5Cr4V2 5.SKD61 bimetallic alloy maerials: 1.Fe-based alloy 2,Ni-based alloy 3,Co-based alloy 4.NiCo-based alloy 5.Tungsten carbide Heat-treatment Nitriding treatment Electroplate hard-chrome High-frequency quenching Spraying corrosion wear-resisting dual metal layers Vacuum quenching