screw barrel for injection machine Material:38CrMoALA, W6Mo5Cr4V2, GH113, EN41B, 9Cr18MoV,42CrMo,SKD61,Nickel-based Alloy, Technology:PTA spraying,HVOF spraying Hardness:55HRC-72HRC Used for:Nylon,Glass fibre,PMMA,ceramical powder,Bakelite etc. We design and supply D15 to D300 screw barrel for various application in plastic industry.