single screw and barrel

Single screw and barrel Size:screw diameter ø20-ø500mm Maximum screw length :10000mm Barrel inner bore diameter :ø500mm Material 38CrMoAlA 40CrMo 42CrMo High quality alloy steel Technology :nitriding treatment Alloy coating sparying Heating treatment Screw fully hardening Specification:Depth of nitrition layer 0.5-0.8mm Nitriding treatment,surface hardness:HV≥900-1000 Fragility of nitrition :less than grade 1 Surface roughtness :Ra 0.4um Surface of hardness of nitrated Cr coating layer ≥950HV Thickness of Cr coating layer :0.03-0.08mm Used for granulation ,PP,PE,PA,PC,ABS,AS etc We can manufacture various kinds of screw barrels according to the customers requirement