... : M2, M7, M35, M42, M2Al, W9, W18. Main Tool steel products: D2,H21,H13,H3,H4,H5,C1,LD,C3, ... tool steel, PM high speed steel, high alloy tool steel, and other alloy steel. Main High speed steel products: M2, M7, M35, M42, M2Al, W9, W18. Main Tool steel ... 6-5-3SKH53EM3:2S607HYW7V3(W7Mo4Cr4V3) HYV4(W12MoCr4V4) EV4 High speed steel,HSS steel,Tool steel