PAP pipe screw barrel for extruder Diameter 55mm-500mm Min.Order 1 set Materials 38CrMoAIA 42CrMo 9Cr18MoV SKD 61 Discount Available Application PAP pipe Payment Term T/T, L/C Technical Process 1.Rough Machining 2.Quenching and Tempering 3.Finish Machining 4.Nitriding 5.Screw polishing Technological Parameter Roughness Ra 0.4um Hardness of Quenching and Tempering HB 240-280 Depth of Nitride Layer 0.5~0.8mm Hardness of Nitride HV 900-1020...
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