... ,60Si2Mn,60Si2MnA,60Si2CrA,60Si2CrVA,etcWire diameter5mm~80mmFree hight10mm~1188mmhardness42HRC~52HRCDirection of coilsRight, leftTotal coilsAs per Drawing / Data.Load Bearing Capacity Load ... , grey, etc.Production methodHot formed, cold formedNoteThe materials and specifications can be dedided by the customers. Construction machinery recoil spring used on excavator