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Yuhong Holding Group Co.,LTD
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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 Aluminium Brass Seamless 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 |
Chemical Composition (UNS C68700)
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 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 Aluminium Brass Seamless Tube:
Evaporator Tubing
Heat Exchanger Tubing
Condenser Tube Plates
Distiller Tubes
Oil Well Pump Liner
Ferrules
Bourdon Tubes
Condenser Tubes
Desalination plant
