... : Product KMD60 KK 60/125 Screw And Barrel For ExtruderHardness after hardening and tempering HB260°~320° Nitrided Hardness HV950°~1000 ... bimetal alloy layer and nitriding treatment HPM38,SI36,SUS440,9Cr18MoV High frequency quenching GHII3 Airset in high temperature Screw Diameter15 ... WPC PE,Super high molecular sheet,1/2 high Calciumbuckle,50-400 high Calcium pipe,50-300 high Calcium Profile,soft ...