... below:Specification:Screw Diameter: Φ15- Φ300L/D ratio=15-53Technical Data:Bimetallic layer analysis38CrMoAlA: Cr, C, Si, Mn, Mo, Al, Ni ... , Cr, Mo, V, S, PFerrous alloy: Fe, Cr, Si, Ni, BNickel alloy: Ni, Cr, Co, Wc, BTungsten alloy: W, Ni, Fe, Cu Products ... 3. Thousands of drawings can supply for you 4. Insist on developing screw and barrel for more injection and extruder machine ...