ASTM B111 C71640 Seamless Copper-Nickel Tube - CuNi30Fe Alloy for Marine Condensers & Heat Exchangers
ASTM B111 C71640 Seamless Copper-Nickel Tube - CuNi30Fe Alloy for Marine Condensers & Heat Exchangers
YUHONG Group, with over 35 years of industrial expertise and a global supply network serving 85 countries, specializes in high-performance non-ferrous alloy tubing solutions. Our ASTM B111 C71640 Copper-Nickel Seamless Tubes are manufactured to meet rigorous international standards for critical applications in marine condensers, heat exchangers, and evaporators. We ensure full traceability, stringent quality control, and reliable performance for demanding service conditions worldwide.
Chemical Composition Requirements (C71640)
| Element | Composition (%) |
| Copper (Cu) + Silver (Ag) | Remainder |
| Nickel (Ni) + Cobalt (Co) | 29.0 - 32.0 |
| Iron (Fe) | 1.7 - 2.3 |
| Manganese (Mn) | 1.5 - 2.5 |
| Carbon (C), max | 0.06 |
| Sulfur (S), max | 0.03 |
| Temper | Tensile Strength, min | Yield Strength, min (0.5% extension) |
| O61 (Annealed) | 63 ksi (435 MPa) | 25 ksi (170 MPa) |
| HR50 (Drawn & Stress-Relieved) | 81 ksi (560 MPa) | 58 ksi (400 MPa) |
Standard Test Requirements
| Test Type | Requirement |
| Expansion Test | 30% of outside diameter (per Table 4) |
| Hydrostatic Test | Maximum pressure 1000 psi (7 MPa) unless specified |
| Eddy Current Test | Mandatory for quality assurance |
| Grain Size (Annealed) | 0.010-0.045 mm |
Key Product Advantages
- High Strength in Marine Service: The CuNi30Fe composition (C71640) provides superior mechanical strength compared to standard copper-nickel alloys, making it ideal for high-pressure condenser and heat exchanger applications.
- Excellent Corrosion Resistance: Demonstrates outstanding resistance to seawater corrosion, biofouling, and erosion, ensuring long-term reliability in marine environments.
- Good Fabricability: Available in annealed (O61) or drawn/stress-relieved (HR50) tempers, offering flexibility for various forming and welding requirements in piping systems.
- Full Compliance with International Standards: Manufactured in strict accordance with ASTM B111 requirements, ensuring consistent quality and dimensional accuracy.
- Proven Performance: Widely used in power generation, marine engineering, and offshore applications where reliability under severe conditions is essential.
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