... be used for auto manufacturing, vessel industry,aerospace ,petrochemical plant, metallurgical machine Forged steel hollow Grade:CK45N, CK60, S355J2G3, ST52-3, 42CRMO4V ... -6, etc Application: Auto manufacturing, vessel industry,aerospace ,petrochemical plant, metallurgical machine, auto-power, wind engine, pecision tools, etc Delivery condition: forged ...