REX M2 is a tungsten-molybdenum high-speed steel offering outstanding performance in all operations where a general-purpose high-speed steel is required. CPM REX M2, produced by the Crucible Particle Metallurgy Process, is an improved-quality product with greater hardness or finer grain size (depending on hardening temperature), better toughness and better grindability than the conventionally produced REX M2. Other characteristics and properties of the two products are very similar (See General Characteristics for more details). This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on forming, heat treating, and machining. Filing Code: TS-293. Producer or source: Crucible Specialty Metals Division, Colt Industries.