... steel. Material:2Cr13,4Cr13,YG15,YG18,W18Cr4V,W6MO5Cr4V2 The hobbing cutter has two series of inlayed alloy and all steel . Alloy ... cutter selection :major component is made of 2Cr13,4Cr13,the cutting ... edge is made of YG15,YG18 and etc. The hobbing cutter is made of W18Cr4V,W6MO5Cr4V2,9Cr18Mov and etc.Certification we ...