... , 20CrNiMoA-40CrNiMoA, 38CrSi, 30CrMnSi, 20CrMnTi, 9CrSi, 9Mn2 5. cold rolled high speed alloy tool steel Size: 12mm-300mmMaterial: W18Cr4V, M42,W6, W9,3Cr2W8V, CrWMn ... , 9SiCr, 4CrW2Si 6. hot rolled sping steel Size: 12mm-250mmMaterial: 60Si2Mn, 65Mn, 50CrVA, 60Si2CrVA 7. cold rolled die steel, bearing steel, carbon tool steel Size: 12mm-250mmMaterial: H13 ...