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Leaded Commercial Bronze Copper Alloy - CDA 314

Leaded Commercial Bronze Copper Alloy (CDA 314) is made of 89% copper, 9% zinc, and 2% lead. The lead helps to improve its machinability while maintaining good corrosion resistance and strength. 

CDA 314 is often used in applications requiring easy machining and shaping. It also offers good electrical conductivity and formability, making it versatile in both industrial and decorative uses.

Chemical Composition

Element

Composition (%)

Copper (Cu)

88.0 - 92.0%

Zinc (Zn)

7.0 - 9.0%

Lead (Pb)

1.5 - 3.0%

Iron (Fe)

0.10% max

Other

0.25% max

 

Physical Properties

Property

Value

Units

Melting Point - Liquidus

1750 °F

954 °C

Melting Point - Solidus

1680 °F

916 °C

Density

0.308 lb/in³ at 68 °F

8.53 g/cm³ at 20 °C

Specific Gravity

8.53

8.53

Electrical Conductivity

28% IACS at 68 °F

0.162 MegaSiemens/cm at 20 °C

Thermal Conductivity

70 Btu/sq ft/ft hr/°F at 68 °F

121.2 W/m at 20 °C

Coefficient of Thermal Expansion

11.1 × 10⁻⁶ per °F (68-572 °F)

19.2 × 10⁻⁶ per °C (20-300 °C)

Specific Heat Capacity

0.09 Btu/lb/°F at 68 °F

377.1 J/kg at 20 °C

Modulus of Elasticity in Tension

16,000 ksi

110,317 MPa

Modulus of Rigidity

6,000 ksi

41,369 MPa

Mechanical Properties

Property

Value

Units

Tensile Strength, min

50 ksi

345 MPa

Yield Strength (0.5% extension under load), min

30 ksi

205 MPa

Elongation (4x diameter or 4x thickness), min

20%

20%

Rockwell B Hardness (typical)

55 HRB

55 HRB

Modulus of Elasticity in Tension

16,000 ksi

110,317 MPa

Modulus of Rigidity

6,000 ksi

41,369 MPa

Shear Strength

-

-

Fatigue Strength

-

-

Thermal Properties

Property

Value

Units

Melting Range

915 - 955

°C

Thermal Conductivity

121

W/m·K

Specific Heat

0.377

J/g·K

Thermal Expansion Coefficient

19.9

µm/m·°C

Fabrication Properties

Property

Characteristic

Chemical Composition

Cu: 87.50-90.50%, Pb: 1.30-2.50%, Zn: Rem., Fe: 0.10%, Ni: 0.70%

Density

0.319 lb/in³ (8.83 g/cm³) at 68°F (20°C)

Melting Point (Liquidus)

1900°F (1038°C)

Melting Point (Solidus)

1850°F (1010°C)

Electrical Conductivity

42% IACS at 68°F (0.246 MegaSiemens/cm)

Thermal Conductivity

104 Btu/sq ft/ft hr at 68°F (180 W/m²·K)

Coefficient of Thermal Expansion

10.2 × 10⁻⁶ per °F (68-572 °F)

Tensile Strength (min)

50 ksi (345 MPa)

Yield Strength (min)

30 ksi (205 MPa)

Elongation

7% in 2 in. or 50 mm min

Rockwell Hardness

HRB 61

Machinability Rating

80

Fabrication Properties

Good for cold working, fair for butt welding, poor for hot forming

Common Applications

Common applications of Leaded Commercial Bronze Copper Alloy (CDA 314) include:

  • Bearings and bushings
  • Gears and worm wheels
  • Valve stems and fittings
  • Electrical connectors and components
  • Fasteners, screws, and threaded parts
  • Plumbing components and fixtures
  • Decorative hardware and trim
  • Marine and industrial equipment components

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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