... 3.15Copper Cu: allow residual 0.030 acuities content 1. hot rolled ordinary carbon round bar Size: 10mm-300mm Material: Q235 ... -40Mn2, 20CrNiMoA-40CrNiMoA, 38CrSi, 30CrMnSi, 20CrMnTi, 9CrSi, 9Mn2 5. hot rolled high speed alloy tool steel Size: 12mm-300mm Material ... , 3Cr2W8V, CrWMn, Cr12MoV, Cr12, 5CrMnMo, 5CrNiMo, 9SiCr, 4CrW2Si 6. hot rolled sping steel Size: 12mm-250mm Material: 60Si2Mn, 65Mn, 50CrVA ...