The material and characteristics of the pogo pin jack
The pin sockets are usually brass, bronze, or copper, and the exterior is tinned, nickel-plated, or gold-plated. They each have the following characteristics:
First, brass characteristics: The three materials selected are H59, H62 and H65, mainly alloys composed of copper and zinc. H59 is the cheapest brass. It has high strength, hardness, and good plasticity, and it can still withstand pressure processing well under hot conditions. When the corrosion resistance is normal, other properties are similar to H62; H65 has good mechanical properties, Good plasticity in a hot state, good plasticity in a cold state, good machinability, easy to brazing and welding, corrosion resistance, but prone to corrosion and cracking, and its price is low. The properties of these three materials are relatively similar and It is also widely used.
Second, bronze characteristics: bronze is mainly divided into three materials with brass: phosphor bronze (c54400), tin bronze (Qsh4-3, Qsh6.5-0.1), beryllium copper (c5191, c17300). Tin phosphor bronze has higher corrosion resistance, wear resistance, and will not produce sparks when punched out; the mass fraction of beryllium in beryllium copper is 1.7-2.5%, and beryllium bronze can have extremely high strength and hardness after quenching and aging. , With automatic processing equipment for melting, extrusion, calendering, and stretching, such as strong convection bright annealing furnace, has been widely used by domestic high-tech, military, foreign and private enterprises.
Third, the copper content of red copper (T2) is as high as 99.99%. It has good electrical conductivity and thermal conductivity and has particularly good plasticity. It is easy to use in hot pressing and cold pressing. It is a large battery in new energy. 
The electrical conductivity of the three copper materials mentioned above is all very good, and they are widely used in the market at present.