High purity copper is a soft, malleable, ductile metal with high thermal and electrical conductivity. The surface of freshly exposed pure copper is reddish orange. Copper is used as a conductor of heat and electricity, as a building material, and as a component of various metal alloys, such as sterling silver for jewelry, copper-nickel for the manufacture of Marine hardware and coins, and Constantine for strain gauges and thermocouples to measure temperature. The ultimate strength of high purity copper is about 210 MPa and the yield strength is about 33 MPa, which limits its availability in industrial applications. But like other alloys, copper can be strengthened. The strengthening mechanism of copper base alloy is mainly alloying. Copper alloy is based on copper alloy, the main alloy elements are Zn, Sn, Si, Al, Ni. Copper based alloys are mainly composed of solute or impurity atoms replacing or substituting matrix atoms replacing solid solutions.
