... ,SUP12 cold rolled round bar1. cold rolled ordinary carbon round bar Size: 10mm-300mmMaterial: Q235 2. cold rolled good-quality ... round bar Size: 12mm-300mmMaterial: 10#--45#, S20C, S45C 3. cold ... 42CrMo, 20Mn2-40Mn, 20CrNiMoA-40CrNiMoA, 38CrSi, 30CrMnSi, 20CrMnTi, 9CrSi, 9Mn2 5. cold rolled high speed alloy tool steel Size: 12mm-300mmMaterial ...