... : High speed tool steel, PM high speed steel, high alloy tool steel, and other alloy steel. Main High speed steel products: M2, M7 ... all over the word in High speed tool steel industry.Tool steel product list:typesHeye gradeContrast gradeGB1299AISIDINJISBOHLEROther contrast gradeCold-work ... steel9Cr189Cr18 SUS 440C 9Cr18Mo9Cr18Mo440CX102CrMo17SUS 440C Hot work Tool steel,Cold work Tool steel,High speed ...