History
Copper was one of the first metals used by people for weapons. Archaeologists find various boards, spearheads, etc. The first alloy, which people started to do was bronze (copper and tin). It also has long been known two copper alloy: brass, copper containing up to 68% applied for the casings, and red brass containing copper from 88% to 97% and applied to the radiator pipes, clad steel, etc.
Nowadays
The main use of copper found in electrical engineering, where the conductivity second only to silver. The electrical resistance of the copper in 2 times less than that of aluminum, and 6 times than that of iron. Also of great use of copper found in the production of pipes, a wide range of applications. Some countries are using copper for the manufacture of coins. In today's copper coins is added to 4.5% - 5.5% aluminum.
