Products Description
C68700 Aluminium Brass Tube
Advantages of C68700 Aluminium Brass Tube
- Corrosion Resistance: C68700 Aluminium brass tubing exhibits exceptional resistance to seawater and steam corrosion. The aluminium element forms a dense protective alumina film on its surface, effectively resisting corrosion. The addition of a trace amount of arsenic significantly inhibits dezincification corrosion, extending its life in marine environments.
- Excellent Mechanical Properties and Processability: C68700 aluminium brass tubing exhibits excellent cold working properties, making it easy to perform bending, expanding, and other forming operations. It also possesses high strength, capable of withstanding certain pressures and demands.
- Economical Performance: It offers the highest cost-performance among seawater-resistant materials, costing less than cupronickel and titanium alloys.
applications of C68700 Aluminium Brass Tube
- Marine Engineering and Shipbuilding: Pipes and fittings for seawater cooling systems, condensers, evaporators, and heat exchangers.
- Heat Exchange Equipment: Heat exchanger, condenser, and evaporator tube bundles used in power plants (including offshore wind power), petrochemicals, refrigeration, and air conditioning.
- Oil and Gas Industry: Heat exchanger and cooler piping for offshore facilities.
Chemical Composition
| Element | Cu | Zn | Al | As | Fe | Others |
| C68700 | 76.0 – 79.0% | Balance | 1.8 – 2.5% | 0.02 – 0.06% | ≤ 0.06% | ≤ 0.3% |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
| Value | 345 – 485 | ≥ 125 | ≥ 30 | 70 – 90 |
Physical Properties
| Property | Density (g/cm³) | Melting Point (°C) | Thermal Conductivity (W/m·K) | Electrical Conductivity (% IACS) | Thermal Expansion (µm/m·°C) |
| Value | 8.53 | 900 – 940 | ~120 | ~26 | 20.5 |
Possible Alternative Grades
- C44300 Naval Brass: An economical choice for freshwater or lightly contaminated water service.
- C70600 90/10 Copper Nickel: Excellent resistance to seawater corrosion and biofouling.
- C71500 70/30 Copper Nickel: Provides increased strength and extended service life in corrosive seawater.
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