Oil Tempered Spring Steel Wire 1.Size:0.5-16mm 2.Material: ... ,77B,77A,82B,60Si2Mn,55SiCr,50CrVa 3.Used:spring Oil Tempered Spring Steel Wire 1. Size:0.5-16mm 2. Material ... steel wire, spring steel wire, mattress spring steel wire, free cutting steel wire, nipple steel wire, etc. 5. Tensile strength: As ...