Standard:GB/T18983,ASTM A401,etc. Grade:55CrSi,60Si2Mn,65Mn Dia:6.0~16. ... customer request. Free Sample to support the new cooperation !!!! Oil quenching & tempering spring steel wire 1.Material:50CrSiA,55CrSiA,60Si2MnA,67CrVA,65Mn,70#,67A ... plastic 6.MOQ: 1 Ton/Tons 7.Standard: GB/T18983-2003,ASTM A229M,ASTM A232M,ASTM A401M,JIS G3560 1 Company and Production process ...