Beryllium (Be, Z=4) is the 44th most abundant element in the earth’s crust. Beryllium is a silvery-white, hard and brittle, extremely light metal, which is highly toxic. The mechanical and thermal properties relating to its low density are superior to those of all other materials, making it very useful for structural and electronic applications. Beryllium metal can be vacuum cast ingot or hot pressed powder.
[BCMA]

• Battery contacts and electronic connectors
• Windows for X-ray tubes
• Aerospace castings
• High-definition and cable television
• Underwater fiber-optic cable systems
• High density circuits for high-speed computers and automotive ignition systems
• Pacemakers and other medical devices