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.ECLIPSALOY 517 is a cerium-magnesium sand casting alloy having excellent creep resistance up to 500 deg. F. It is suitable for applications where pressure tightness is required and good corrosion resistance is important. It responds to an age-hardening heat treatment.