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.CHASE 69000 is a high-strength copper alloy that exceeds the strength levels of phosphor bronzes and some beryllium copper alloys. It is an electronic grade of copper alloy with excellent hot and cold-working characteristics. It is available in strip form and can be joined by soldering, brazing and resistance welding.