... ,SUP9,SUP9A,SUP10,SUP11,SUP12 cold rolled round bar1. cold rolled ordinary carbon round bar Size: 10mm-300mmMaterial: Q235 2. cold rolled good-quality round bar Size ... , 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 ...