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.CHROMEL-D is a special 35-20 nickel-chromium alloy developed primarily for use as heating elements in industrial furnaces designed to operate in the critical temperature range between 1500 and 1800 F. with controlled atmospheres.