The brass is any alloy of copper (at least 50%) and zinc, the proportions of zinc and copper can be varied to create a range of brasses with different properties. In the presence of other elements in high percentages, the league called a special brass. It has a yellow color, somewhat similar to gold.

It becomes opaque and it is often used as decoration and for coins. Compared to copper is more ductile, malleable and has a good resistance to corrosion.

In ancient times the polished brass was often used as a mirror.

It is used for decorations for his brilliance, and for applications in which is require a low friction, such as locks, gears, bearings, doors, ammunition, valves. It is used for plumbing and electrical, musical instrument and hinges. Brass with zinc 10 to 20% is called "pinchbeck" to color like gold, and is used in jewelry.

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