Standard:GB/T18983,ASTM A401,etc. Grade:55CrSi,60Si2Mn,65Mn Dia:6.0~16.0mm T/S and packing according ... the new cooperation !!!! Oil quenching & tempering spring steel wire 1.Material:50CrSiA,55CrSiA,60Si2MnA,67CrVA,65Mn,70#,67A,67B,72A,72B 2.The range ...