... SUP 5, SUP6, SUP7 , SUP9 , SUP10 spring flat steel Name: spring steel flat bar Material : 65MN,60Si2Mn,55CrMnA,SUP7 ... Our foreign guests demand for the bulk of spring steel flat bar, So our company prepared ... of types different size of the various conventional spring flat! As the export needs,So we ... with low cost and good quality spring steel flat bar! Name: spring steel flat barMaterial : 65MN,60Si2Mn ...