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.Tungsten rhenium wire is used for heating elements in high-temperature furnaces and thermocouples and in electronics. Its advantage is its ability to maintain greater ductility than tungsten maintains, after exposure to extremely high temperatures.