... forde:250-32000KN Superhard screw for injection molding machine Screw materialsGrade A super hard screw Base material ... for processing of 50-60% fiberglass, Bakelite, dynamoelectric injection machine, magnetic particle ,ceramic powder, aluminum and magnesium powder, ... condition .Yielding strength under the high temperature of 650°Ccan reach 125Ksinh, having superior alkaline resistance and ...