It has 6 times the specific stiffness of steel. Beryllium has a very high melting point and it maintains useful mechanical properties up to much higher temperatures than most other metals, yet it is also prized for its excellent cryogenic properties.
Beryllium combines high thermal conductivity with the highest specific heat of any metal for superior thermal diffusivity, making it extremely useful for dissipating thermal transients. Beryllium has excellent damping characteristics. It is a low Z material, with the highest x-ray transparency of any engineering material.
This fascinating metal has an extensive heritage in space structures, airborne, earth- and space-based optics, and the semiconductor, medical and nuclear industries. Designers continue to specify beryllium due to its unmatched capabilities for medical, aerospace, defense, information technology, scientific, nuclear and other applications.