... speed steel W6Mo5Cr4V2 4. quenching treatment screw element for co-rotating twin screw extruder machineMaterial: W6Mo5Cr4V2 high speed tool steel; ... wear;In segemented design;Hardness: HRC58-64 MT series twin-screw extruderMixing modificationPE,PP,PS+SBS,PA+EPDM,PP ... materialsEVA heat-melting glue,polyurethane,fluorin rubber,fluorin plastics,PPcigarette filtering material and TPR sole materialReaction ...