CANNON-MUSKEGON H-12 is an air-hardening hot-work cast tool steel used for applications requiring good toughness combined with good red hardness. The alloy will harden from a relatively low austenitizing temperature. A higher silicon content is permissable in this cast steel than in AISI H-12 (wrought) tool steel. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on casting, heat treating, machining, and joining. Filing Code: TS-255. Producer or source: Cannon-Muskegon Corporation.