38CrMoAIA single screw and barrel for injection Diameter 30mm-120mm Min.Order 1 set Materials 38CrMoAIA 42CrMo(JIS SCM440) 9Cr18MoV CW6Mo5Cr4V2 Discount Available Application EVA,PMMA,ABS Payment Term T/T, L/C Technical Process 1.Rough Machining 2.Quenching and Tempering 3.Finish Machining 4.Nitriding 5.Spraying and welding with alloy power 6.Screw polishing Technological Parameter Roughness Ra 0.4um Hardness of Quenching ...