Viscount 44 is a free machining ready-to-use Type H 13 hot work die steel with good strength retention at 800-1000 F (427-538 C). This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on heat treating, machining, and joining. Filing Code: TS-97. Producer or source: Latrobe Steel Company. Originally published September 1960, revised March 1990.