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B68 - Seamless Copper Tube, Bright Annealed

B68 Seamless Copper Tube, Bright Annealed is a seamless copper tube that undergoes a bright annealing process, which gives it a smooth, polished surface and improved ductility. It is known for excellent heat conductivity, corrosion resistance, and clean, smooth internal surfaces, making it ideal for fluid and gas transfer applications.

Chemical Composition

Element

Composition (%)

Copper

84.0 to 86.0

Lead

0.05 max

Iron

0.05 max

Zinc

Remainder

 

Physical Properties

Property

Value

Density

8.75 g/cm³

Melting Point

1010°C (1850°F)

Mechanical Properties

Property

Annealed (O61)

Drawn General Purpose (H58)

Tensile Strength (min)

40,000 psi (275 MPa)

50,000 psi (345 MPa)

Yield Strength (min)

12,000 psi (83 MPa)

30,000 psi (205 MPa)

Elongation in 2 in. (50.8 mm) (min)

35%

15%

Thermal Properties

Property

Value

Thermal Conductivity

159 W/m·K

Coefficient of Thermal Expansion

18.7 µm/m·K (20-300°C)

Fabrication Properties

Property

Characteristic

Machinability

Good

Formability

Excellent (annealed), Good (drawn)

Weldability

Good

Brazeability

Excellent

Solderability

Excellent

Common Applications

Common applications for B68 - Seamless Copper Tube, Bright Annealed include:

  • HVAC Systems: Used in air conditioning and refrigeration systems due to its thermal conductivity and clean interior surface.
  • Plumbing: Employed in water supply lines for residential and commercial buildings.
  • Heat Exchangers: Ideal for use in heat exchanger tubes because of its thermal transfer efficiency.
  • Medical Gas Lines: Used in medical facilities for oxygen, nitrogen, and other gas distribution systems.
  • Instrumentation and Gauges: Suitable for precision instruments due to its smooth interior and corrosion resistance.
  • Refrigeration Systems: Applied in cooling systems for smooth fluid flow and heat transfer.
  • Industrial Fluid Transfer: Used in systems requiring reliable, corrosion-resistant tubing for liquids and gases.
  • Automotive Industry: Employed in components such as fuel and brake lines due to its durability and clean surface.
  • Electrical Applications: Used in electrical systems for wiring and grounding due to its excellent electrical conductivity.

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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