Pure copper is a rose red metal, which turns purple after forming a Copper(II) oxide film on its surface. Therefore, industrial pure copper is often called red copper or electrolytic copper. The density is 8-9g/cm3, and the melting point is 1083 ° C. Pure copper has good conductivity and is widely used in the manufacturing of wires, cables, brushes, etc; Good thermal conductivity, commonly used to manufacture magnetic instruments and meters that require protection against magnetic interference, such as compasses and aviation instruments; Excellent plasticity, easy to hot press and cold press processing, can be made into copper materials such as pipes, bars, wires, strips, plates, foils, etc.

Brass is an alloy of copper and zinc. The simplest brass is a copper zinc binary alloy, known as simple brass or ordinary brass tube. Changing the zinc content in brass can yield brass with different mechanical properties. The higher the zinc content in brass, the higher its strength and slightly lower its plasticity. The zinc content of brass used in industry does not exceed 45%, and a higher zinc content will lead to brittleness and deterioration of alloy properties.

Tin bronze is the earliest alloy used in history, originally referring to copper tin alloy. Due to its bluish gray color, it is called bronze. Tin bronze has high mechanical properties, good corrosion resistance, friction reduction, and good casting performance; Low sensitivity to overheating and gases, good welding performance, no ferromagnetism, and low shrinkage coefficient. Tin bronze has higher corrosion resistance than brass in atmosphere, seawater, fresh water, and steam.