... rolled or forged 3.Surface:bright or black Carbon steel round bar1. hot rolled ordinary carbon round barSize: 10mm-300mm,Material: Q235 2 ... , 65Mn, 50CrVA, 60Si2CrVA 7. hot rolled die steel, bearing steel, carbon tool steel Size: 12mm-250mm,Material: H13, T8, T9, T10 ...