Beryllium bronze is a copper alloy is one of the best comprehensive properties, it has the strength, hardness and elastic limit higher than any other copper alloy, its small elastic lag, elastic stability, excellent wear resistance, corrosion resistance, high temperature resistance and low temperature, fatigue resistance, with electrical and thermal conductivity of benign good; in addition there is no magnetic, impact does not produce sparks and other characteristics, are widely used in aerospace, electronics, communication, machinery, petroleum, chemical industry, automobile and home appliance industry. Used for the production of key parts of important, such as membrane disc, diaphragm, bellows, spring washers, micro motor brush and commutator, electrical connectors, switches, contacts, clock parts, audio components, advanced bearing, gear, auto electrical appliance, plastic mold, welding electrodes, submarine cable, pressure shell, non sparking tools etc..