1.for single screw extruder
2.material:38CrMoAlA
2.Bimetallic layer
3.Chrome plateextruder screw and barrels are used for the single screw extruders  Screw material: 38CrMoAlA(JIS SACM645) Surface Treatment: Nitriding treatment, Hard chrome plating Nitriding layer thickness: 0.6-0.8mm Nitriding hardness: 900-1000HV Chrome layer hardness >950HV Chrome layer thickness: 0.025-0.085mm screw diameters: 25mm,45mm,50mm,65mm,75mm,90mm,100mm,105mm,110mm,120mm,150mm,180mm,200mm