... For Extruder ISO9001-2001,Molybdenum Alloy patent Certification KMD60 KK 60/125 Screw And Barrel For ExtruderFor good ... Depth 0.50~0.7mm Nitrided Brittleness above 2 stage Surface Roughness Ra0.4 Screw straightness 0.015mm ... Depth 0.05~0.10mm ALLoy Depth 0.8~2.0mm Alloy hardness HRC56°~65° Alloy iron,nickel ... WPC PVC.WPC PE,Super high molecular sheet,1/2 high Calciumbuckle,50-400 high Calcium pipe,50-300 ...