A copper turned part is a mechanical part formed by machining on a lathe. It is not an assembly composed of multiple "components," but rather a single, machined product. Its "composition" should be understood in terms of both material composition and typical product type.
Made copper parts are mostly made of leaded brass (such as CuZn44Pb2, HPb63-3, CuZn38Pb1.5, etc.). The main constituent elements include:
Copper (Cu): The base metal, providing electrical conductivity, corrosion resistance, and basic strength.
Zinc (Zn): Improves strength and hardness, reduces plasticity, suitable for cutting and forming.
Lead (Pb): A key element, forming an "internal lubricating" phase, significantly improving cutting performance (chip breaking, friction reduction, and extended tool life).
Trace elements (such as Al, Fe, Mn, Ni, Sn, Sb, etc.): Added in small amounts to refine the microstructure, improve corrosion resistance, or stabilize machining performance.
