... Custom Production 3.Wear-resistant 4.Bimetallic & Nitrided abs,pvc,pp,pe,pa conical twin screw and barrel We , ... die head, gearbox, filter screen changer and so on); plastic processing machinery. Location advantage: located in China's Screw Town - ... quality alloy steelTechnology: nitrided treatment, alloy coating spraying, heat-treatmentAppliance: PVC, PP, PE, PA, PC, ABS .etcDepth of Nitrated Layer: ...