CANNON-MUSKEGON H-19 is an air-hardening, tough, hot-work tool steel that has excellent resistance to shock and abrasion at elevated temperatures while maintaining good hot hardness. 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-244. Producer or source: Cannon-Muskegon Corporation.