Bimetallic/Nitriding Screws & Barrels: 1.Quality Material Used 2.Custom Designed 3.Wear-resistant,Durable 4.Prompt Delivery Screw,Barrel and Tips for Injection Molding Machine 1.Material:38CrMoAlA(Nitriding steel),SKD11,SKD61,high quality alloy steel,etc 2.Technology:nitriding treatment ,alloy coating spraying, heat-treatment applied 3.Application:PE,PVC,PP,etc. 4.Technical Index: 1)Depth of ...