8. Cullen M, et al. Chronic beryllium disease in a precious metal refinery: clinical, epidemiologic, and immunologic evidence for continuing risk from exposure to low-level beryllium fume. Am Rev Respir Dis 1987; 135:201-208.

Beryllium copper, also known as copper beryllium, CuBe or beryllium bronze, is a metal alloy of copper and 0.5 to 3% beryllium, and sometimes with other alloying elements, and has significant metalworking and operating performance qualities.

Contents

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* 1 Properties

* 2 Uses

* 3 Alloys

* 4 External links

[edit] Properties

Beryllium copper is a ductile, weldable, and machinable alloy. It is resistant to non-oxidizing acids (for example, hydrochloric acid, or carbonic acid), to plastic decomposition products, to abrasive wear and to galling. Furthermore, it can be heat-treated to improve its strength, durability, and electrical conductivity.

Beryllium copper may have a carcinogenic effect if inhaled and gloves and masks are recommended while handling it. As a result, it is sometimes replaced by safer beryllium copper alloys such as Cu-Ni-Sn beryllium.[1]

[edit] Uses

Beryllium copper is used in springs and other parts that must retain their shapes during periods in which they are subjected to repeated strain. Due to its electrical conductivity, it is used in low-current contacts for batteries and electrical connectors. And because it is non-sparking but physically tough and non-magnetic, it is used to make tools that can be used in explosive environments.

Beryllium copper is also frequently used in the manufacture of professional-quality percussion instruments, especially tambourine and triangle, where it is prized for its clear tone and strong resonance. Unlike most other materials, an instrument composed of beryllium copper will maintain a consistent tone and timbre for as long as the material resonates. The "feel" of such instruments is rich and melodious to the point that they seem out of place when used in darker, more rhythmic pieces of classical music.

[edit] Alloys