Free Cutting Brass - CDA 360
Free Cutting Brass (CDA 360) is a copper-zinc-lead alloy known for its excellent machinability, making it ideal for high-speed machining processes. It offers good strength, corrosion resistance, and is widely used in the production of precision components.
Chemical Composition
Element |
Composition (%) |
Copper |
60.0 - 63.0 |
Lead |
2.5 - 3.5 |
Iron |
0.35 max |
Zinc |
Remainder |
Physical Properties
Property |
Value |
Density |
0.307 lb/in³ at 68°F (8.50 g/cm³ at 20°C) |
Specific Gravity |
8.50 |
Melting Point (Liquidus) |
1710°F (932°C) |
Melting Point (Solidus) |
1650°F (899°C) |
Electrical Conductivity |
26% IACS at 68°F |
Thermal Conductivity |
67 Btu/sq ft/ft hr/°F at 68°F (116 W/m·K at 20°C) |
Coefficient of Thermal Expansion (68-572°F) |
11.3 × 10⁻⁶ per °F (20.3 × 10⁻⁶ per °C) |
Specific Heat Capacity |
0.09 Btu/lb/°F at 68°F (377 J/kg·K at 20°C) |
Modulus of Elasticity in Tension |
15,000 ksi (103 GPa) |
Modulus of Rigidity |
5,600 ksi (38.6 GPa) |
Mechanical Properties
Property |
Value |
Tensile Strength (min) |
50-70 ksi (345-485 MPa) |
Yield Strength (min) |
30-50 ksi (205-345 MPa) |
Elongation (min) |
10-25% |
Rockwell Hardness B |
55-82 HRB |
Shear Strength |
30-47 ksi (207-324 MPa) |
Modulus of Elasticity |
15,000-16,000 ksi (103-110 GPa) |
Modulus of Rigidity |
5,600-6,000 ksi (38.6-41.4 GPa) |
Thermal Properties
Property |
Value |
Melting Point (Liquidus) |
1710°F (932°C) |
Melting Point (Solidus) |
1650°F (899°C) |
Thermal Conductivity |
67 Btu/sq ft/ft hr/°F at 68°F (116 W/m·K at 20°C) |
Coefficient of Thermal Expansion (68-572°F) |
11.3 × 10⁻⁶ per °F (20.3 × 10⁻⁶ per °C) |
Specific Heat Capacity |
0.09 Btu/lb/°F at 68°F (377 J/kg·K at 20°C) |
Annealing Temperature Range |
800-1200°F (427-649°C) |
Hot Working Temperature Range |
1300-1450°F (704-788°C) |
Fabrication Properties
Property |
Characteristic |
Machinability |
Excellent (Rating: 100) |
Cold Formability |
Fair |
Hot Formability |
Fair |
Soldering |
Excellent |
Brazing |
Good |
Gas-shielded Arc Welding |
Not Recommended |
Oxy-acetylene Welding |
Not Recommended |
Coated Metal-arc Welding |
Not Recommended |
Resistance Welding: Spot and Seam |
Not Recommended |
Resistance Welding: Butt |
Fair |
Annealing Temperature Range |
800-1100°F (427-593°C) |
Hot Working Temperature Range |
1300-1450°F (704-788°C) |
Common Applications
Common applications of Free Cutting Brass (CDA 360) include:
- Screws, bolts, and fasteners
- Precision-machined components
- Gears and pinions
- Valve components
- Plumbing fittings and connectors
How Can Drawn Metal Help
If you have any queries about the metal products that we offer, don’t hesitate to get in touch with us.