ALLEGHENY METAL 350 is a chromium-nickel-molybdenum stainless steel developed to bridge the gap between the 300 and 400 series. It can be hardened by heat treatment. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-29. Producer or source: Allegheny Ludlum Corporation. Originally published May 1955, revised June 1963.