... auto manufacturing, vessel industry,aerospace ,petrochemical plant, metallurgical machine Forged steel hollow Grade:CK45N, CK60, S355J2G3, ST52-3, 42CRMO4V,41ALCRMO7,21CRMOV5-11 ... : forged round bar, forged shafts, forged cylinder, forged disk, forged hollow, forged square, forged rings, forged mould, forged flange Size: diameter ...