BRUSH WELLMAN S-65B is a grade of beryllium strengthened by a dispersion of beryllium oxide. It has moderate strength and fairly low ductility (a minimum of 3% elongation). Its uses include optical applications, nuclear reactors, instrumentation, X-ray windows, high-speed computer parts, audio components and aerospace structural applications. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Be-3. Producer or source: Brush Wellman Inc..