... .high tensile strength 3.surface smooth 4.CK53, CK70, SUP10, SUP12, SAE5160 Our company enjoys domestically advanced cold rolling equipment, perfect ... or old customers. 1. Steel grade:SUP9,SUP9A,SUP10,SUP7,SUP12,SUP12V,SUP6,SUP7,SAE9254,SAE5160,SAE9260,SAE6150,55Cr3,51CrV4,52CrMoV4 ... specifications and hope to work together with you in thefuture. sup12 sae5160 Cold rolled &spring steel strip