C26200

C26200 is a yellow brass alloy also known as CuZn30 or Cartridge Brass. It contains about 67-70% copper and 29.6-33% zinc, with small amounts of lead and iron to improve machinability and strength.

Chemical Composition

• Copper (Cu): 67 – 70%

• Zinc (Zn): 29.6 – 33%

• Lead (Pb): Up to 0.07%

• Iron (Fe): Up to 0.05%

• Residual impurities: Up to 0.3%

Mechanical Properties

• Tensile Strength (Ultimate): Approximately 330 to 770 MPa (varies with temper and form)

• Yield Strength (Proof): Approximately 110 to 490 MPa

• Elongation: Wide range depending on temper, typically 10% to 45%

• Rockwell B Hardness: 55 to 93 (varies by temper)

Physical Properties

• Density: About 8.5 g/cm³

• Melting Point: Around 900-954°C

• Electrical Conductivity: Around 27% IACS

• Thermal Conductivity: Approx. 67 Btu/sq ft/ft/hr/°F (116 W/m·K)

• Coefficient of Thermal Expansion: Approx. 11.3 × 10⁻⁶ /°F

Fabrication and Uses

• Excellent machinability for free machining brass applications

• Good cold forming and deep drawing capabilities

• Used extensively in electrical fittings, fasteners, valves, and architectural hardware

• Suitable for soldering, brazing, and welding (oxyacetylene recommended)