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 WELL MAN I-70A is an instrument and optical grade of beryllium strengthened by a dispersion of 0.7% beryllium oxide maximum. It has relatively low strength and fairly low ductility (a minimum of 2% elongation). Its uses include optical applications, instrumentation, and optical-instrumentation applications.