... without drawings.Please find the detailed infomation about bimetallic single screw barrel for extruder as below:Specification:Screw ... Φ300L/D ratio=15-53Technical Data:Bimetallic layer analysis38CrMoAlA: Cr, C, Si, Mn, Mo, Al, Ni, Cu, P, ... S40Cr: Cr, Mn, C, Si, Ni, S, P, CuStainless steel: Cr, Ni, Ti ... , Mn, N, Nb, Mo, Si, CuSKD61: C, Si, Mn, Cr, Mo, V, S, PFerrous alloy: Fe ...