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.WahChang W-25Re is a tungsten-rhenium alloy recommended for uses where high reliability at high temperatures and ductilities at low temperatures are required, such as, xray targets, cladding, thermocouples, nuclear and aerospace components.