FAGERSTA M-1 is a high-molybdenum, low-tungsten type of high-speed steel. It has good cutting ability, except for heavy-duty, continuous cutting operations where ultimate re-hardness is required. Its numerous uses include boring tools, gear cutters, milling cutters and twist drills. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, machining, and surface treatment. Filing Code: TS-345. Producer or source: Fagersta Steels Inc..