AK Steel 436L Ultra Form out performs AISI Type 409 in oxidation and corrosion. This material is resistant to stress-corrosion cracking in the presence of chlorides and has excellent formability. The alloy is used in exhaust systems. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-1062. Producer or source: AK Steel Corporation.