CRUCIBLE 17Cr-4Ni is a precipitation hardenable stainless steel which is capable of high strength and hardness levels after a relatively simple heat-treatment procedure. This steel is martensitic and magnetic in both solution-treated and precipitation-hardened conditions. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness, creep, and fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-249. Producer or source: Crucible Specialty Metals Division, Colt Industries.