... 4130, 1022, GCr15 , 8620H ,SS400,ST37,15CrMo,20CrMo,35CrMo, cold rolled round bar We are making the round steel bar all ... -40CrNiMoA, 38CrSi, 30CrMnSi, 20CrMnTi, 9CrSi, 9Mn2 5. hot rolled high speed alloy tool steel Size: 12mm-300mmMaterial: W18Cr4V, M42 ... CrWMn, Cr12MoV, Cr12, 5CrMnMo, 5CrNiMo, 9SiCr, 4CrW2Si 6. hot rolled sping steel Size: 12mm-250mmMaterial: 60Si2Mn, 65Mn, 50CrVA, 60Si2CrVA 7 ...