Brass is an alloy material mainly composed of copper and zinc.

**I. Characteristics**

1. The composition ratio is variable, generally 60% to 90% copper and 40% to 10% zinc.

2. In terms of physical properties, it is golden yellow, has a high density, and has certain electrical and thermal conductivity.

3. In terms of chemical properties, it has certain corrosion resistance to the atmosphere, water, etc., and will oxidize to form verdigris in a humid environment.

**II. Uses**

1. In the field of decoration, it is used for jewelry, handicrafts, architectural decoration, etc.

2. In mechanical manufacturing, it can be used to make valves, gears and other parts.

3. In the electrical field, it can be used as a conductor material in equipment with low requirements.

**III. Processing technology**

Including casting, forging and cutting.