Only recently did the first PM High Speed Steels appear on the market. Such steels are produced by powder metallurgy. Alloy powders are fabricated by gas atomisation and the powder is then consolidated by Hot Isostatic Pressing (HIP).
Such steels exhibit virtually isotropic properties due to a homogeneous and segregation-free microstructure. They show better workability and grindability, less distortion on heat treatment, excellent surface finishing and higher productivity. PM also renders possible the production of higher alloyed steel grades than accessible by ingot metallurgy or of non-conventional (eg V-rich) variants.