Boehler W400 VMR is a hot-work tool steel with high working hardness for longer tool life. The alloy has good toughness and ductility and improved fracture toughness over other hot-work materials. This datasheet provides information on composition, physical properties, and elasticity. It also includes information on heat treating and machining. Filing Code: TS-650. Producer or source: Böhler-Uddeholm North America.