... shaft 2.vacuum degassed, forged, heat treated, finish machined. 3.weight:< 60000Kg,diameter:<4m,length ... own workshops and physical & chemical testing centers for free forging, die forging, material preparation, machining, and heat treatment. Shanghai ZENT Industrial ... steel, alloy steel, stainless steel and nickel base alloy steel, die forging, and their rough and final machining. Besides, our company ...