Quick Answer
Brass is made primarily of copper and zinc. Zinc typically ranges from 5% to 45%, affecting strength, color, and corrosion resistance. Some brass grades include small amounts of lead, tin, or aluminum.
Basic Composition of Brass
Brass is an alloy formed by combining copper (Cu) and zinc (Zn). The zinc percentage determines mechanical strength and appearance.
| Brass Type | Copper (%) | Zinc (%) | Other Elements |
|---|---|---|---|
| Yellow Brass | 67–70% | 30–33% | Trace Lead |
| Red Brass | 85% | 15% | Small Tin |
| Cartridge Brass | 70% | 30% | None |
Physical and Mechanical Properties
| Property | Typical Value |
|---|---|
| Density | 8.4 – 8.7 g/cm³ |
| Melting Point | 900 – 940°C |
| Tensile Strength | 300 – 550 MPa |
| Corrosion Resistance | Good |
Common Uses of Brass
Brass is widely used in plumbing fittings, electrical connectors, musical instruments, decorative hardware, ammunition casings, and industrial fasteners.