Yellow Brass Copper Alloy - CDA 272/274
Yellow Brass Copper Alloy (CDA 272/274) is a copper alloy primarily composed of around 63-65% copper and 35-37% zinc. It is known for its golden-yellow color, excellent corrosion resistance, and good machinability.
These alloys are versatile, offering a balance of strength, ductility, and formability, making them suitable for a wide range of applications. CDA 272/274 is often used in both industrial and decorative products.
Chemical Composition
Element |
Composition (%) |
Copper (Cu) |
61.0 - 65.0 |
Zinc (Zn) |
Rem. |
Lead (Pb) |
Max. 0.09 |
Iron (Fe) |
Max. 0.07 |
Physical Properties
Property |
Value |
Melting Point (Liquidus) |
1680°F |
Density | 0.305 lb/cu in at 68°F |
Specific Gravity | 8.44 |
Electrical Conductivity | 27.6% IACS at 68°F |
Thermal Conductivity | 67 Btu/sq ft/ft hr/°F at 68°F |
Mechanical Properties
Property |
Value |
Tensile Strength |
74 ksi |
Yield Strength | 55 ksi |
Elongation | 10% |
Thermal Properties
Property |
Value |
Melting Point | 1680°F |
Thermal Conductivity | 67 Btu/sq ft/ft hr/°F at 68°F |
Specific Heat Capacity | 0.09 Btu/lb/°F at 68°F |
Coefficient of Thermal Expansion | 11.4 × 10^-6 per °F |
Fabrication Properties
Property |
Characteristic |
Cold Working | Good |
Hot Working | Fair |
Machinability | Good |
Soldering | Excellent |
Brazing | Excellent |
Oxyacetylene Welding | Good |
Gas Shielded Arc Welding | Fair |
Common Applications
Common applications of Yellow Brass Copper Alloy (CDA 272/274) include:
- Plumbing fixtures and fittings
- Decorative architectural hardware
- Electrical connectors and terminals
- Heat exchanger tubes
- Automotive parts, such as radiators and trim
- Musical instruments (brass components)
- Fasteners, screws, and rivets
- Jewelry and decorative items
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