C27000

C27000 is a yellow brass alloy with approximately 65% copper, known for its moderately high strength, good corrosion resistance, and excellent ductility in some forms.

Chemical Composition

• Copper (Cu): 63.00% – 68.50%

• Zinc (Zn): Remaining balance (around 31% – 37%)

• Lead (Pb): Up to 0.10%

• Iron (Fe): Up to 0.70%

• Other minor elements: Up to 0.30%

Mechanical Properties

• Ultimate Tensile Strength (UTS): 545 – 650 MPa (depending on form and size)

• Elongation: Varies by form and temper

• Hardness: Varies with form and temper

Physical Properties

• Density: 8.47 g/cm³

• Melting Point: Solidus around 1660°F (904°C), Liquidus around 1710°F (932°C)

• Electrical Conductivity: Approximately 27% IACS at 68°F

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

• Coefficient of Thermal Expansion: 11.3 x 10⁻⁶ per °F (68–572°F)

Fabrication and Machinability

• Excellent soldering and brazing capability

• Good oxyacetylene welding, fair gas shielded arc welding

• Not recommended for coated metal arc welding and seam welding

• Good spot weld and butt weld capability

• Excellent capacity for cold working, poor capacity for hot forming

• Machinability rating is about 30 (where free cutting brass Alloy 360 rates 100)

Typical Uses

• Hot or cold-formed products such as fittings, valves, and architectural components

• Applications requiring good corrosion resistance and moderate strength

• Suitable for components demanding durable, ductile yellow brass