... 2.high tensile strength 3.surface smooth 4.CK53, CK70, SUP10, SUP12, SAE5160 Our company enjoys domestically advanced cold rolling equipment ... of new or old customers. 1. Steel grade:SUP9,SUP9A,SUP10,SUP7,SUP12,SUP12V,SUP6,SUP7,SAE9254,SAE5160,SAE9260,SAE6150,55Cr3,51CrV4,52CrMoV4,55Si7,60Si7 ...