... vented screw and barrel for extruding machine Brand name: Titan Material: 38 CrMoAlA gas vented screw and barrel for extruding machineSize: screw ... bore diameter:Φ500mm Technology: nitriding treatment, alloy coating spraying, heating treatment, screw fully hardening,Depth of nitrition layer: 0.5 ... alloy plating: 0.03-0.08mmDepth of alloy layer:2mmUsed for granulation,PP, PE, PA, PC, ABS,AS etcTitan is ...