Allegheny 203EZ is a free-machining chromium-nickel-manganese austenitic stainless steel recommended for high-speed automatic screw machine products. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-226. Producer or source: Allegheny Ludlum Corporation.