... forging,casting,grinding and heat treatment,Each blade can meet your requirement.Meanwhile,all of blade materials are spring steel 65Mn,SUP6 ... /2 , 33/476/81/83/89/95266605/5.5/6/7/833/8 , 31/2 , 4 , 41/4 , 41/286 ... /89/102/108/114287105/5.5/6/7/84 , 41/4 , 41/2 , 5 , 51/8102/108/ ... 114/127/130307606/7/8/10/1143/4 , 51/4121/133compositionCMnSiSPNiCrCuNbcontents %0.62~0 ...