... Less back pressure. Low Melt temperature. twin screw barrel for PVC pipe extruder machineScrew Diameter: Φ25mm-Φ92mmMaterial: 38CrMoAlA; SKD61; SKD11; 40Cr; 42CrMo; ... quality alloy steelTechnology: nitriding treatment, alloy coating spraying, heat-treatmentAppliance: PVC, PP, PE, PA, PC, ABS, AS etcTechnical Index (30g ... of Bimetallic Layer: >2mm LUCH010 twin screw barrel for PVC pipe extruder machine