... , stainless steel , aluminum alloy , zinc alloy , brass , gray iron , nodular cast iron , ductile iron ... 5~10Out Diameter50mm-1500mmProcessingPrecision hot and cold forging, casting, precision machining and roll forming.MachiningTurning , milling , drilling ... tempering.StandardISO, GB, JIS, DIN, AGMA and non-standardSurface TreatmentCarburizing, hardening and tempering, Nitriding, high frequency ...