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.BRUSH WELLMAN SR-200E is a grade of beryllium strengthened by a dispersion of beryllium oxide (2.0%). It has relatively high strength and ductility (a minimum of 10% elongation). Its uses include missiles, space vehicles, structural parts on both commercial and military satellites and optical support benches.