... the spring steel (GB standard) : 65#, 70#, 85#, 65Mn, 55SiMnVB, 60Si2Mn, 60Si2MnA, 60Si2CrA, 60Si2CrVA Spring steel Dimensions: 10-300mm Hot rolled spring steel 65# ... 0.25Max 0.25We can supply you the spring steel (GB standard) : 65#, 70#, 85#, 65Mn, 55SiMnVB, 60Si2Mn, 60Si2MnA, 60Si2CrA, 60Si2CrVA ... , we are able to produce dozens type of spring flat steel from 6*40mm to 20*150mm.Grade:GB 55Si2Mn ...