... alloy layer 4,longer lifetime Tairong Machiney Spare Parts of Twin Screw Extruder convenient interchangeability by agile combination. ... self-cleaning, transmission, compounding, pressure-forming, etc.made of high tool speed W6Mo5Cr4V2, or anti-corrosion steel 38CrMoAlA ... will become twin screw which are essential and key part of extruders for material to transmission, shearing and plasticization.We ...