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.ALLEGHENY LUDLUM AL2205 ALLOY represents a recent development in the family of duplex alloys in which added nitrogen significantly improves corrosion resistance, especially in the welded condition. The microstructure consists of a balanced mixture of austenitic and ferritic phases. Its corrosion resistance to many environments is superior to Types 316 or 317 and it has a yield strength more than double that of AISI conventional austenitic stainless steels. It is most often found in the form of welded pipe or tubular components where resistance to general corrosion and chloride stress-corrosion cracking is important.