Red Brass Copper Alloy - CDA 230
Red Brass Copper Alloy (CDA 230) is a copper alloy composed of approximately 85% copper, 5% zinc, 5% lead, and 5% tin. It is known for its excellent corrosion resistance, strength, and machinability.
CDA 230 is often used in applications that require durability in harsh environments. Its reddish color and superior properties make it suitable for both functional and decorative uses.
Chemical Composition
Element |
Composition (%) |
Copper (Cu) |
89.0 - 91.0% |
Zinc (Zn) |
9.0 - 11.0% (Remainder) |
Lead (Pb) |
0.05% max |
Iron (Fe) |
0.05% max |
Physical Properties
Property |
Value |
Units |
Density |
8.80 |
g/cm³ |
Melting Point |
1,016 - 1,045 |
°C |
Electrical Conductivity |
44 |
% IACS |
Thermal Conductivity |
188.5 |
W/m-K |
Specific Heat |
376.8 |
J/kg-K |
Coefficient of Thermal Expansion |
18.4 |
µm/m-°C |
Modulus of Elasticity |
117 |
GPa |
Poisson's Ratio |
0.31 |
- |
Mechanical Properties
Property |
Value |
Units |
Tensile Strength, Ultimate |
393 - 455 |
MPa |
Tensile Strength, Yield |
365 - 434 |
MPa |
Elongation at Break |
2.0 - 6.0 |
% |
Hardness, Rockwell 30T |
62 - 66 |
- |
Shear Strength |
230 |
MPa |
Shear Modulus |
44 |
GPa |
Modulus of Elasticity |
117 |
GPa |
Fatigue Strength |
158 |
MPa |
Thermal Properties
Property |
Value |
Units |
Melting Point |
1,016 - 1,045 |
°C |
Thermal Conductivity |
188.5 |
W/m-K |
Specific Heat |
376.8 |
J/kg-K |
Coefficient of Thermal Expansion |
18.4 |
µm/m-°C |
Fabrication Properties
Property |
Characteristic |
Notes |
Cold Workability |
Excellent |
High capacity for cold working |
Hot Workability |
Good |
Suitable for various forming processes |
Work Hardening Rate |
Moderate |
Slower than higher zinc alloys (e.g., 240, 260) |
Annealing Requirements |
Moderate |
Fewer anneals needed between operations |
Forming Processes |
Versatile |
Suitable for drawing, blanking, coining, stamping, piercing, and punching |
Machining |
Generally Good |
Specific data for CDA 220 not available; based on general copper alloy properties |
Welding |
Possible |
Specific data for CDA 220 not available; many copper alloys are weldable |
Common Applications
Common applications of Red Brass Copper Alloy (CDA 230) include:
- Plumbing fittings and valves
- Pump and meter components
- Marine hardware and equipment
- Electrical connectors and terminals
- Decorative architectural elements
- Heat exchanger and condenser tubes
- Bearings and bushings
- Musical instrument components
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