... by order grade : SUP 5, SUP6, SUP7 , SUP9 , SUP10 spring flat steel Name: spring steel flat bar Material : 65MN,60Si2Mn,55CrMnA,SUP7,SUP9,SUP10 ... Becauses of Our foreign guests demand for the bulk of spring steel flat bar, So our company prepared a thousands tons ... can provide you with low cost and good quality spring steel flat bar! Name: spring steel flat barMaterial : 65MN,60Si2Mn,55CrMnA,SUP7,SUP9, ...