LUMDIE is a tungsten-chromium hot work steel recommended for die casting dies, forging and extrusion dies. It is an air hardening steel having high temperature properties and heat resistance. It is particularly suited for long run die casting dies, brass forging dies, and for various extrusion tools such as dummy blocks, dies, and mandrels. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-194. Producer or source: Latrobe Steel Company.