Cooper Alloy Tube B111 C68700 O61 Annealed, Aluminium Brass Seamless Tubing For Sea Water Heat Exchanger
Cooper Alloy Tube B111 C68700 O61 Annealed, Aluminium Brass Seamless Tubing For Sea Water Heat Exchanger
Short Introduction: C68700 Copper Alloy Seamless Tube
C68700 Copper Alloy Seamless Tube, also known as Aluminium Brass Tube, is a high-performance, non-ferrous tubing material made primarily of copper, zinc, and aluminium. It offers excellent corrosion resistance, particularly in seawater and marine environments, and is commonly used in heat exchangers, condensers, and power plant cooling systems.
The seamless design ensures leak-free operation under pressure and thermal stress. Its high thermal conductivity, good mechanical strength, and resistance to biofouling make it ideal for demanding industrial and marine applications.
Key Characteristics of C68700 Copper Alloy Tube
| Feature | Description |
|---|---|
| Type | Seamless (SMLS) copper alloy tube |
| Standard | ASME SB111 / ASTM B111 |
| Corrosion Resistance | Excellent in seawater, brackish water |
| Thermal Conductivity | ~121 W/m·K |
| Mechanical Strength | Tensile ≥ 345 MPa, Yield ≥ 125 MPa (annealed) |
| Workability | Good for expansion, bending, welding |
| Biofouling Resistance | High due to aluminium content |
ASME SB111 C68700 Copper Alloy Tube Chemical Composition
Element | Percentage (%) |
|---|---|
Copper (Cu) | 76.0 – 79.0 |
Zinc (Zn) | Balance |
Aluminium (Al) | 1.8 – 2.5 |
Iron (Fe) | 0.02 – 0.06 |
Manganese (Mn) | 0.2 – 0.6 |
Arsenic (As) | Trace (for corrosion resistance) |
ASME SB111 C68700 Copper Alloy Tube Mechanical Properties
| Copper or Copper Alloy UNS NO. | Temper Designation | Tensile Strength | Yield Strength | Elongation in 2 in., | |
| Code | Former | min ksi(min MPa) | min ksi(min MPa) | min % | |
| C68700 | O61 | annealed | 50(345) | 18(125) | --- |
ASME SB111 C68700 Equivelant
| STANDARD | UNS | WERKSTOFF NR. |
| Aluminium Brass | C68700 | 2.0460 / 1785 |
Application of C68700 Copper Alloy Seamless Tube:
Marine engine seawater coolers
Hydraulic oil coolers for construction machinery
Power plant small condenser tubes
Industrial air compressor aftercoolers
Water-cooled chiller evaporators & condensers
Shipboard auxiliary machinery cooling systems
Lubricating oil coolers for generator sets
Small shell-and-tube heat exchangers
Seawater desalination preheater tubes
HVAC module unit heat exchange tubes
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