... Wear-resistant 4.Bimetallic & Nitrided abs,pvc,pp,pe,pa conical twin screw and barrel We ,Lucheng screw Machinery ... Molding applications; relevant accessories(such as die head, gearbox, filter screen changer and so on); plastic processing machinery. Location advantage ... treatment, alloy coating spraying, heat-treatmentAppliance: PVC, PP, PE, PA, PC, ABS .etcDepth of Nitrated Layer: 0.5-0.7mmHardness ...