Dynamax is a superhigh-speed tool steel with cobalt, designed for high hot hardness. It is used to machine the toughest aerospace alloys. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on high temperature performance and wear resistance as well as heat treating and machining. Filing Code: TS-628. Producer or source: Timken Latrobe Steel.