Brass 220 Chemical Composition
The main elements present in UNS C22000 are copper (Cu), lead (Pb), zinc(Zn), and tin (Sn). The chemical composition of this alloy includes 67% copper, 28% zinc, 5% lead, 0.25% tin, and other trace elements such as iron (Fe), manganese (Mn), nickel (Ni), sulfur (S) and phosphorus(P). These elements combine to create an alloy highly resistant to corrosion from most acids and alkalis at room temperature.
| Chemistry Information | |
| Element | Percentage |
| Cu | 90 |
| Zn | 10 |
Bronze UNS C22000 Physical Properties
Bronze 220 has a melting temperature of 930°C (1706°F) and a density of 8.8 g/cm3. It is classified as an alpha-beta brass because it contains both alpha (α) and beta (β) phases in its microstructure. The hardness range is between 70 to 95 Brinell (HBW), with a tensile strength of 600 MPa (87 ksi). It exhibits good wear resistance thanks to its high lead content, making it an ideal material for bearings and bushings.
Bronze UNS C22000 Mechanical Properties
The mechanical properties of 220 Bronze include a high level of strength due to its combination of metals, which helps increase the material's ductility. It also has excellent thermal stability, making it suitable for high-temperature applications such as gas turbines or boilers where temperatures can reach up to 450°C (842°F). Additionally, this material has good machinability, allowing easy shaping during production processes like forging or casting.
Bronze 220 Applications & Corrosion Resistance
Bronze C220 has many possible applications due to its strong physical properties, such as resistance to corrosion from most acids and alkalis and excellent thermal stability, allowing it to be used in high-temperature applications like gas turbines or boilers without compromising its quality or integrity over time. Common uses include valve stems, lock bodies, piston rings, bearings, bushings, and electrical fittings. To ensure maximum corrosion resistance when using Bronze 220, it should be heat treated before application to maximize the beneficial effects of the alloy's chemical composition, including increased hardness and improved tensile strength.
