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.AISI No. 660 is a heat-resistant iron-chromium-nickel alloy recommended for applications requiring high strength and good resistance to corrosion at temperatures up to 1300 F and for lower stresses at higher temperatures. This age-hardenable stainless steel has high resistance to oxidation in continuous service to 1500 F and in intermittent service to 1800 F. Its many high-temperature applications include jet-engine turbine wheels and blades, bolting and afterburner parts.