Material:aluminium,copper alloy 45# steel,40Cr,42CrMo,L6 or according to customers request Surface:anti- ... , Cold forging, Upset forging 2) Materials: Aluminum, copper alloy 45# steel, 40Cr, 42CrMo, L6 or according to the customers request. 3 ... home and abroad visit our company and send enquiry to us. steel shaft ,precision shaft(OEM)