CPM Rex T15 is a super high speed steel made by the Crucible Particle Metallurgy (CPM) process. It is a tungsten type high speed containing high vanadium for excellent abrasion resistance, and cobalt for good red hardness. CPM Rex T15 is ideal for cutting difficult to machine materials where high frictional heating is encountered.

The CPM process results in a homogeneous microstructure with a finer, more uniform carbide distribution imparting superior dimensional stability, grindability and toughness when compared to steels produced by conventional processes. The CPM process also allows the design of more highly alloyed grades which cannot be produced by conventional steelmaking.