... : 38CrMoAlA; SKD61; SKD11.etc. screw barrel for plastic injection molding machine We ,Lucheng screw Machinery Factory, ... materials, such as: PE, PP, PVC, PS, ABS, PA, POM, PC, PSV, PTFE, PR, UP, PEC, PF, VF ... spraying, heat-treatmentAppliance: PVC, PP, PE, PA, PC, ABS, AS etcDepth of Nitrated Layer: 0.5-0.8mmHardness ... of Screw Barrel : PE PP PVC ABS PS plastic injection molding machine screw and barrel