... all kinds of screw and barrel in this field for 15 years.We know very well of different screw designs of ... screw barrel for extruder as below:Specification:Screw Diameter: Φ15- Φ300L/D ratio=15-53Technical Data:Bimetallic layer analysis38CrMoAlA: Cr, C, Si ... , Cr, Mo, V, S, PFerrous alloy: Fe, Cr, Si, Ni, BNickel alloy: Ni, Cr, Co, Wc, BTungsten alloy: W, Ni, Fe, Cu Products ...