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