ASTM B466 Seamless Copper Nickel Pipe CuNi 70/30 for Heat Exchanger Applications
ASTM B466 CuNi 70/30 Condenser Tube Heat Exchanger Nickel Copper Alloy Seamless Pipe
1.Product Description
Copper-nickel pipe is a seamless or welded tubular product made from copper-nickel alloy, primarily composed of copper (Cu) and nickel (Ni), with minor additions of iron (Fe) and manganese (Mn) to enhance mechanical properties and corrosion resistance. The most common grades are 90/10 (CuNi 90/10, UNS C70600) and 70/30 (CuNi 70/30, UNS C71500). These pipes are manufactured according to international standards such as ASTM B466, B467, B111, and EN 12451, offering excellent dimensional accuracy, uniform wall thickness, and superior surface quality. They are available in a wide range of diameters and schedules to meet diverse engineering requirements.
2. Product Applications
Copper-nickel pipes are widely used in marine engineering, offshore oil and gas platforms, shipbuilding (hull piping, cooling water systems, fire protection systems), seawater desalination plants, power generation stations (condenser and heat exchanger tubes), chemical processing industries, and coastal infrastructure. They are the preferred material for conveying seawater, brine, and other corrosive fluids, as well as for high-temperature steam and hydraulic systems requiring reliable anti-fouling and biofouling resistance.
3. Product Advantages
-
Superior corrosion resistance – Exceptional resistance to seawater, brackish water, and chloride-induced pitting, stress corrosion cracking, and erosion-corrosion.
-
Excellent biofouling resistance – Naturally inhibits marine organism adhesion, reducing maintenance and cleaning frequency.
-
High strength and ductility – Good mechanical properties at both ambient and elevated temperatures, with easy bending, flanging, and welding.
-
Long service life – Proven track record of 30+ years in marine environments with minimal degradation.
-
Low magnetic permeability – Suitable for applications where non-magnetic materials are required.
-
Good thermal conductivity – Efficient heat transfer performance for heat exchanger applications.
-
Fabrication friendly – Compatible with standard welding, brazing, and soldering techniques; readily machinable.
4.Key Technical Parameters
| Parameter | 90/10 (C70600) | 70/30 (C71500) |
| Chemical Composition | Cu: 88.5–90.5%, Ni: 9.0–11.0%, Fe: 1.0–1.8%, Mn: ≤1.0% | Cu: 68.5–70.5%, Ni: 29.0–31.0%, Fe: 0.4–1.0%, Mn: ≤1.0% |
| Density | 8.94 g/cm³ | 8.94 g/cm³ |
| Melting Range | 1,100–1,150°C | 1,170–1,240°C |
| Tensile Strength (min) | 290 MPa | 485 MPa |
| Yield Strength (0.2% offset, min) | 105 MPa | 175 MPa |
| Elongation (min) | 30% (in 50 mm) | 30% (in 50 mm) |
| Hardness (Rockwell B) | 65–80 HRB | 75–90 HRB |
| Electrical Conductivity | ~7% IACS | ~4.5% IACS |
| Thermal Conductivity | ~45 W/(m·K) at 20°C | ~29 W/(m·K) at 20°C |
| Coefficient of Thermal Expansion | ~16.2 × 10⁻⁶ /°C (20–300°C) | ~15.8 × 10⁻⁶ /°C (20–300°C) |
| Operating Temperature Range | –200°C to +300°C | –200°C to +350°C |
| Standard Dimensions | OD: 6.0–400.0 mm; Wall thickness: 0.5–30.0 mm; Length: up to 12 m (or as required) | |
| Manufacturing Standards | ASTM B466/B467/B111, EN 12451, JIS H3300, etc. | |
| Product Forms | Seamless or welded (straight or coiled) |
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.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.