CHROMAX Def. 520 is an iron-nickel-chromium alloy having high oxidation and heat resistance. It is recommended for operations up to 1900 F. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-188. Producer or source: Driver-Harris Company.