View Sample Alloy Digest Data Sheet (PDF)Since 1952, Alloy Digest has been the leading reference for materials property data on metals and alloys used throughout the world. Featuring graphs, charts and tables, these sheets give facts and figures on composition or characterization, physical and mechanical properties, heat treatment, and machinability.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.