... 2.Process:hot rolled or forged 3.Surface:bright or black Carbon steel round bar1. hot rolled ordinary carbon round barSize: 10mm-300mm, ... 20CrMnTi, 9CrSi, 9Mn2 5. hot rolled high speed alloy tool steel Size: 12mm-300mm,Material: W18Cr4V, M42,W6, W9,3Cr2W8V, ... Material: 60Si2Mn, 65Mn, 50CrVA, 60Si2CrVA 7. hot rolled die steel, bearing steel, carbon tool steel Size: 12mm-250mm,Material: H13, T8, T9, T10, ...