... drawing or buye's request bimetallic Conical twin screw and barrel for plastic scrap Specification:35/76, 45/90, 45/100, ... SACM645,40Cr,AISI4140,42CrMoBimetallic of the inner hole centrifugal casting GHII3 nature hard after high temperatureMaterial of screw raw ... layer 4Cr5MoSiV1,SKD-61,SKD-11Spraying bimetal alloy layer and nitriding treatment HPM38,SI36,SUS440,9Cr18MoV high frequency ...