beryllium copper beryllium bronze high king of the "elastic" beryllium copper for the domestic most the high grade mould beryllium copper, containing beryllium by around 2%, with high strength, high hardness, high conductivity, high elasticity, wear resistance, fatigue resistance, corrosion resistance and low elastic hysteresis, etc, is mainly used for temperature control, phone battery, computers, auto parts, micro-motor, brush needle, senior bearings, eyeglasses, contact parts, gear, punch and all kinds of no spark switch, all kinds of welding electrodes and precision casting mold and so on.