Copper-nickel alloy (Cu-Ni), often called white copper in China, is mainly composed of copper and nickel, and contains small amounts of iron and manganese. These alloys offer extremely high strength, excellent corrosion resistance, low resistivity, and good thermoelectric properties. They significantly reduce the temperature coefficient of resistance and have mechanical and physical properties superior to most other copper alloys. CuNi alloy has excellent ductility, high hardness, beautiful appearance, excellent corrosion resistance, and supports deep drawing processing, showing good performance at both normal and high temperatures. In addition, they offer excellent machinability, weldability, and are non-magnetic.