Abstract Allegheny Ludlum AL 453 Alloy is a ferritic stainless steel with low levels of rare earth metals added to reduce the growth rate of oxides at high temperatures. The enhanced oxidation resistance makes it applicable to high-temperature applications. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and machining. Filing Code: SS-958. Producer or source: Allegheny Ludlum.