ASTM B111 CuNi 70/30 Seamless Copper Nickel Tube C71500 Corrosion Resistant for Heat Exchanger
ASTM B111 CuNi 70/30 Copper Nickel Alloy Seamless Tube C71500 for Shipbuilding & Heat Exchanger
1.Product Description
Copper nickel tubes are high-performance cupronickel alloy pipes containing 5–30% nickel, with the most common grades being 90-10 (C70600) and 70-30 (C71500). Minor additions of iron and manganese enhance their anti-corrosion properties. Featuring a face-centered cubic crystalline structure, these tubes exhibit outstanding toughness and a distinctive silver-white metallic sheen that intensifies with higher nickel content. Available in seamless (ASTM B466) and welded (ASTM B467) forms, they are the premier choice for demanding fluid transport environments.
2.Product Applications
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Marine engineering: Seawater cooling, firefighting, ballast, and bilge systems on vessels and platforms.
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Thermal management: Condensers, heat exchangers, and evaporators in power plants and chemical plants.
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Desalination: Multi-stage flash (MSF) and multi-effect distillation (MED) equipment.
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Offshore oil & gas: Riser sheathing, firewater deluge systems, and platform utility piping.
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Industrial hydraulics: High-pressure brake lines and precision hydraulic tubing.
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General corrosion resistance: Piping for brine, diluted acids, and sulfides in processing industries.
3.Product Advantages
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Ultra-low corrosion rates: 0.025 – 0.0025 mm/year in seawater, with a self-healing oxide/nickel-rich protective film.
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Anti-biofouling: Naturally deters marine organisms, reducing maintenance frequency.
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High mechanical strength: 70-30 offers superior inherent strength; both grades allow for work-hardening enhancement.
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Thermal efficiency: 90-10 provides ~50 W·m⁻¹·K⁻¹; 70-30 offers ~29 W·m⁻¹·K⁻¹ for balanced heat exchange.
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Superior workability: Excellent weldability, bendability, flaring, and cold-forming capabilities.
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Lifecycle cost efficiency: Extended service life directly improves vessel availability and lowers replacement costs.
4.Key Product Specifications
| Category | Parameter | 90-10 (C70600) | 70-30 (C71500) |
| Chemistry | Nickel (Ni) | 9.0 – 11.0% | 29.0 – 33.0% |
| Iron (Fe) | 1.0 – 1.8% | 0.4 – 1.0% | |
| Lead (Pb) | ≤0.05% | ≤0.05% | |
| Mechanical (Annealed) | Tensile Strength | 275 – 310 MPa | 345 – 310 MPa |
| Yield Strength | 105 – 90 MPa | 140 – 105 MPa | |
| Elongation | ≥25% | ≥30% | |
| Physical | Density (g/cm³) | 8.90 | 8.94 |
| Thermal Cond. (W/m·K) | ~50 | ~29 | |
| Melting Point (°C) | 1100 – 1150 | ~1171 | |
| Resistivity (µΩ·cm) | 19 | 37.4 | |
| Expansion (×10⁻⁶/K) | 17 | 16.2 | |
| Dimensions | O.D. Range | Φ6 – 325 mm | Φ6 – 325 mm |
| Wall Thickness | 1 – 30 mm | 1 – 30 mm | |
| Max. Length | 16 meters | 16 meters | |
| Standards | Applicable Specs | ASTM B466/B467/B111, DIN 86019, GB/T (B10, B30) | Same as left |
FAQ
1. Are you trading company or manufacturer ? We are manufacturer ,You can see the certification.
2.How long is your delivery time? Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
3. Do you provide samples ? is it free or extra ? Yes, we could offer the sample for free charge but need pay the cost of freight.
4. What is your terms of payment ? Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
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