... : 38CrMoAlA; SKD61; SKD11.etc. screw barrel for plastic injection moulding machine We ,Lucheng screw Machinery Factory, is ... all kinds of rubber raw materials, such as: PE, PP, PVC, PS, ABS, PA, POM, PC, PSV, ... nitriding treatment, alloy coating spraying, heat-treatmentAppliance: PVC, PP, PE, PA, PC, ABS, AS etcDepth of Nitrated ... : Nitrided 38CrMoAlA screw and barrel for injection molding machine