ASTM B151 Copper Nickel Pipe CuNi 70/30 Boiler & Condenser Seamless Tube
ASTM B151 Copper Nickel Pipe CuNi 70/30 Boiler & Condenser Seamless Tube
1.Product Description
Copper nickel pipe is a high-performance alloy tube primarily composed of copper with nickel as the principal alloying element. It is manufactured in accordance with international standards such as ASTM B466/B467, BS 2871, and DNV. The two most common grades are C70600 (90/10) and C71500 (70/30). This material is specifically engineered for demanding environments requiring excellent resistance to seawater corrosion, thermal conductivity, and good mechanical strength.
2.Product Applications
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Marine & Shipbuilding: Seawater cooling lines, ballast systems, fire main systems, sanitary piping.
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Offshore & Oil & Gas: Hydraulic and lubrication lines on platforms, fire water systems.
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Power Generation: Steam turbine condensers, feedwater heaters, air coolers (nuclear & thermal plants).
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Desalination: Multi-stage flash (MSF) and reverse osmosis (RO) evaporator tubing.
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Chemical Processing: Heat exchangers for acetic acid, brine, and other mild corrosive media.
3.Product Advantages
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Superior Seawater Corrosion Resistance: Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC) in chloride environments.
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Anti-Biofouling: Natural resistance to marine organism attachment, reducing maintenance and flow blockage.
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High Erosion Resistance: Performs well in high-velocity seawater (3.5 – 4.5 m/s), resisting impingement attack.
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Excellent Fabricability: Can be easily bent, expanded, flanged, and welded using standard techniques.
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Proven Longevity: Service life of 30+ years in marine applications, offering low life-cycle cost.
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Good Thermal Conductivity: Higher than stainless steel, making it ideal for heat transfer equipment.
4.Key Product Parameters
| Parameter | C70600 (90/10) | C71500 (70/30) |
| Nickel Content (%) | 9.0 – 11.0 | 29.0 – 33.0 |
| Iron Content (%) | 1.0 – 1.8 | 0.4 – 1.0 |
| Manganese Content (%) | ≤ 1.0 | ≤ 1.0 |
| Outer Diameter Range | 6 mm – 610 mm | 6 mm – 610 mm |
| Wall Thickness Range | 0.5 mm – 50 mm | 0.5 mm – 50 mm |
| Length | Random (3–12 m) or Fixed | Random (3–12 m) or Fixed |
| Density (20°C) | 8.90 g/cm³ | 8.94 g/cm³ |
| Melting Range | 1100 – 1240 °C | 1170 – 1240 °C |
| Tensile Strength (min.) | 310 MPa | 480 MPa |
| Yield Strength (0.2% offset, min.) | 110 MPa | 170 MPa |
| Elongation (min.) | 30% | 25% |
| Thermal Conductivity (20°C) | 40 W/(m·K) | 29 W/(m·K) |
| Coefficient of Thermal Expansion (20-300°C) | 17.0 × 10⁻⁶ /K | 16.2 × 10⁻⁶ /K |
| Electrical Resistivity | 0.19 µΩ·m | 0.38 µΩ·m |
| Hardness (HB max.) | 90 | 125 |
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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