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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. 

 

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