Copper Beryllium is a copper alloy with the optimum combination of mechanical and physical properties such as tensile strength, fatigue strength, performance under elevated temperatures, electrical conductivity, bending formability and corrosion resistance. Copper Beryllium is widely used as contact springs in various applications like connectors, switches, relays, etc. NGK offers a variety of Copper Beryllium alloys in several tempers to cover different applications. Our Copper Beryllium products are available in strip, plate, rod and wire forms.
Copper Beryllium can attain the tensile strength of 1500N / mm2 through precipitation hardening and can withstand very high bending stress.
Age hardenable material can be formed into complicated shapes and precipitation hardened afterwards. Among Mill-hardened material, which dose not require heat-treatment after stamping or forming, "Type-B" and "Type-S" have especially well-balanced performance in strength and formability.
The electrical conductivity of beryllium copper ranges from 20 to 70 IACS, depending on alloy and temper. Copper Beryllium is often used a high current density spring material.
Because Copper Beryllium exhibits excellent resistance to fatigue, it is also used in components where a longer life in service with a cycle stress environment is needed.
Due to less stress relaxation at elevated temperatures Copper Beryllium can be used in a wide range of temperatures with little loss of mechanical properties.
Copper Beryllium has excellent corrosion resistance, nearly the same as Nickel Silver.
New grade "Type-B" and "Type-S" mill-hardened Alloy-25 have been developed by refinement of the manufacturing process for improved formability.
