1.Conical twin screw and barrel 2.Alloy hardness:hrc50-65 3.Centrifugal casting(tungsten carbide) 4.Hot sale Conical twin screw barrel for plastic processing machinery Materials38crmoala 42crmo(jis scm440) 9cr18mov Skd61 etc Port departure Ningbo port Shanghai port Technical ParameterDiamete45/2- 150/2 Technical ParameterRoughnessRa 0.4um Hardness of nitrideHv850-1000Hardness of Quenching temperingHb280-320 Alloy depth0.8-2.0mmDepth of nitride layer0.5-0.8mm Alloy hardnessHrc50-65 Min 1 set Dimension:45/90 50/105 55/110 65/132 80/156 92/188