Like copper, brass is a non-ferrous, red metal. Unlike pure metal, however, it is a metal alloy that primarily consists of copper and zinc. Other metals—such as lead, tin, iron, aluminum, silicon, and manganese—are also added to produce more unique combinations of characteristics.
The addition of zinc enhances the strength and ductility of the base copper material. The higher the concentration of zinc, the stronger and more pliable the alloy. High-strength brass contains ≥39% zinc.

The most common brass bar grade is CZ121 / CW614N, though below are the other available brass grade.
Alloy 260
Alloy 272
Alloy 330
Alloy 353
Alloy 360
Alloy 385
Alloy C48200 – C48500
Alloy 464. Alloy 464 (or naval brass)