Beryllium copper and beryllium bronze are the same material. Beryllium copper is a copper alloy with beryllium as the main alloying element, also called beryllium bronze.

Beryllium copper has beryllium as the main alloying group element of a tin-free bronze. Containing 1.7 ~ 2.5% beryllium and a small amount of nickel, chromium, titanium and other elements, after quenching and aging treatment, the strength limit of up to 1250 ~ 1500MPa, close to the level of medium strength steel. In the quenched state plasticity is very good, can be processed into a variety of semi-finished products. Beryllium bronze has high hardness, elasticity limit, fatigue limit and wear resistance, also has good corrosion resistance, thermal conductivity and electrical conductivity, does not produce sparks when impacted, widely used as important elastic components, wear-resistant parts and explosion-proof tools. Commonly used grades are QBe2, QBe2.5, QBe1.7, QBe1.9 and so on.

Beryllium bronze is divided into two categories. According to the alloy composition, beryllium content of 0.2% to 0.6% is high conductivity (electrical, thermal) beryllium bronze; beryllium content of 1.6% to 2.0% is high strength beryllium bronze. According to the manufacturing process, it can be divided into cast beryllium bronze and deformed beryllium bronze.

Beryllium bronze has good overall performance. Its mechanical properties, i.e. strength, hardness, wear resistance and fatigue resistance are among the top of copper alloys. Its electrical conductivity, thermal conductivity, non-magnetic, anti-sparking and other properties of other copper materials can not be compared with it. In the solid solution soft state beryllium bronze strength and electrical conductivity are at the lowest value, after work hardening, the strength has improved, but the conductivity is still the lowest value. After aging heat treatment, its strength and conductivity increased significantly.

Beryllium bronze machinability, welding performance, polishing performance and general high copper alloy similar. In order to improve the machining performance of the alloy to adapt to the precision requirements of precision parts, countries have developed a lead 0.2% to 0.6% of high-strength beryllium bronze (C17300), and its performance is equivalent to C17200, but the alloy cutting coefficient by the original 20% to 60% (100% for free-cutting brass).