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.The Sandvik grade Kanthal APMT is an advanced powder metallurgical resistance heating alloy of the family FeCrAlMo that has good form stability at high temperatures.