Leading producer from Beijing Main Tool steel products: D2,H21,H13,H3,H4,H5,C1,LD,C3,440C Main HSS products: M2, M7 ... , M42, M2Al, W9, W18. Main Tool steel products: D2,H21,H13,H3,H4,H5,C1,LD,C3,440COutput of High Speed Steel ... with friends from all over the word in High speed tool steel industry.Tool steel product list:typesHeye gradeContrast gradeGB1299AISIDINJISBOHLEROther contrast gradeCold-work ...