Brass has been known since the third millennium B.C. from Assyria and Babylonia. Where electrical conductivity and mechanical stability are needed at the same time brass is technically significant. Antennas or waveguides for example are often made of brass. Because of its good chemical corrosion properties it is often used for bathroom fittings in sanitary installation. In addition, it is a good bearing material because of its emergency running properties.
Copper, gold and tin were the first metals mankind got to know. Copper is used for coins, electric cables, jewelry, cutlery, fittings, boilers, precision parts, art objects, musical instruments, pipelines etc. For electrical cables, conductors and components as well as heat sinks it is commonly used because of its very good electrical and thermal conductivity properties.
Aluminium has a low density which is why it is used in areas where mass must be moved like in the packaging or aerospace industry and it also becomes more important in vehicle construction.