SPEED STAR is a fine-grained molybdenum-tungsten high-speed steel with an excellent combination of wear resistance and toughness. Among its many uses are lathe tools, drills, gear cutters and wood knives. This datasheet provides information on composition, physical properties, hardness, elasticity, and compressive strength as well as fracture toughness. It also includes information on forming, heat treating, and machining. Filing Code: TS-303. Producer or source: Carpenter.