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.Armco 409 Ni is a fine-grain stainless steel developed for applications more than 0.120 in. thick needing an alloy superior to Type 409 stainless steels in weld formability and toughness. Applications include coal-handling equipment, transportation containers, mixers, liners, exhaust flanges, heat shields, and cyclones.