White copper wire is a copper-based alloy with nickel as the main added element. It is silvery white and has a metallic luster, hence the name white copper. When the nickel content in the alloy composition of white copper exceeds 16%, the color of the alloy will become relatively white like silver. The higher the nickel content, the whiter the color. However, even if the nickel content does not exceed 70%, the yellow color of copper can still be seen with the naked eye, because the proportion of copper in white copper is still dominant. The specific gravity and hardness of white copper wire are greater than those of aluminum wire, and its thermal and electrical conductivity are also better. At the same time, it has good corrosion resistance and is very stable in dry air. White copper wire can be divided into ordinary white copper and complex white copper according to the different ratios between copper and nickel. Ordinary white copper is a binary alloy composed of copper and nickel, while complex white copper is based on ordinary white copper with elements such as manganese, iron, zinc, and aluminum added to further improve the performance of the alloy. Due to its excellent strength, corrosion resistance, resistance and thermoelectric properties, white copper wire is widely used in various fields that require these properties, such as the manufacture of precision instruments, springs for advanced electronic components, socket housings and other parts 12.
In addition, the C7521 grade in white copper wire is a specific white copper alloy with excellent hot stamping, cold heading and ductility, as well as good knurling, riveting and corrosion resistance. It is suitable for cold heading, bending and riveting parts manufacturing of automatic lathes and CNC lathes, as well as connectors and connectors for electronics and telecommunications. It is widely used in the manufacture of parts that require ecological protection and health and safety, such as gears, clocks, computer hardware and other parts
