BETHLEHEM M-10 is a high-molybdenum type of high-speed steel. It is a general-purpose steel for cutting tools such as twist drills and is used for many other single- and multiple-point cutting applications. This datasheet provides information on composition, physical properties, and hardness as well as fracture toughness. It also includes information on forming, heat treating, and machining. Filing Code: TS-286. Producer or source: Bethlehem Steel Corporation.