We supply various types of screw barrels according to customer's requirement. Product name: Screw element Key word: Screw barrel, bimetallic screw barrel, extruder screw barrel, screw barrel for injection molding machine, conical or parallel screw barrel, Material: 38CrMoAlA, SKD11, SKD61, HPT2B, high quality alloy steel, etc Technology: Nitriding treatment, alloy coating sparying, heat-treatment, etc Appliance: PE, PVC, PP, etc Technical index: Depth of Nitrated Layer: 0.5-0.8mm Hardness of nitration: 900-1020Hv Fragility of nitration: Less than grade 1 Surface roughness: Ra 0.4um Hardness of Cr-coating Layer: ≥ 950Hv Thickness of Cr-coated Layer: 0.03-0.08mm Hardness of Bimetallic Layer: HRC55-72 Depth of Bimetallic Layer: >2mm Guarantee: Common nitrided: 1-2years, Bimetallic: Much long time...
