90/10 Copper Nickel Pipe and Tube
90/10 Copper Nickel Pipe and Tube, also known as CuNi 90/10 pipe, C70600 copper nickel tube, or CuNiFe pipe, is widely used in seawater systems, shipbuilding, offshore engineering, desalination plants, power stations, and heat exchangers. With excellent resistance to seawater corrosion, good thermal conductivity, and stable mechanical performance, it has become one of the most reliable materials for marine and industrial piping systems.
At our factory, we supply seamless and welded 90/10 copper nickel pipes and tubes in a wide range of sizes, wall thicknesses, and international standards. Whether you need straight lengths, cut-to-size pipes, or complete piping packages with fittings and flanges, we can support your project from material selection to final delivery.
- Material: C70600 / CuNi 90/10 / CuNi10Fe1Mn
- Forms: seamless pipe, welded pipe, tube
- Standards: ASTM, ASME, DIN, EN, EEMUA, JIS
- Applications: seawater, marine, offshore, heat exchanger
- Testing: PMI, eddy current, hydrostatic, ultrasonic, third-party inspection
You can also view our full range of copper nickel products, including 70/30 copper nickel pipe and tube for more demanding seawater applications.
What Is 90/10 Copper Nickel Pipe and Tube?
90/10 copper nickel is an alloy mainly composed of approximately 90% copper and 10% nickel, with small additions of iron and manganese. These elements improve resistance to seawater corrosion, erosion, and biofouling.
Compared with ordinary copper or brass materials, 90/10 Copper Nickel Pipe and Tube performs better in flowing seawater and harsh marine environments. It forms a natural protective surface film, which helps reduce corrosion and extends service life.
This makes CuNi 90/10 tubing a practical choice for systems where long-term reliability is more important than short-term material cost.
90/10 Copper Nickel Pipe Specifications
We manufacture and supply seamless and welded CuNi 90/10 pipes according to international standards. Custom dimensions, lengths, and end finishes are available to meet marine, offshore, shipbuilding, desalination, and industrial piping requirements.
| Specification | Details |
| Product | 90/10 Copper Nickel Pipe (CuNi 90/10 Pipe) |
| Material Grade | C70600 / CuNi10Fe1Mn |
| Manufacturing Process | Seamless, Welded |
| Forms | Straight Pipe, Cut Length Pipe, Large Diameter Pipe, Thin Wall Pipe, Heavy Wall Pipe |
| Standards | ASTM B466, ASTM B467, ASTM B111, EN 12451, DIN 86019, EEMUA 144/234, ASME SB466, ASME SB467 |
| Outside Diameter (OD) | 6 mm – 1200 mm (Custom Available) |
| Wall Thickness | 0.5 mm – 50 mm |
| Length | Random Length, Fixed Length, Double Random, Cut to Size |
| Pipe Ends | Plain End (PE), Beveled End (BE), Threaded End (TBE) |
| Surface Finish | Bright Annealed, Pickled, Polished, Mill Finish |
| Pressure Test | Hydrostatic Test, Eddy Current Test, Air Under Water Test |
| Inspection | PMI, Mechanical Testing, Chemical Analysis, Dimensional Inspection, Third-party Inspection |
| Applications | Seawater Cooling Systems, Heat Exchangers, Condensers, Shipbuilding, Offshore Platforms, Firefighting Systems, Desalination Plants |
We also supply matching copper nickel elbows, tees, flanges, reducers, stub ends, caps, and complete prefabricated piping spools.
Features of 90/10 Copper Nickel Pipe and Tube
Excellent Seawater Corrosion Resistance
One of the main reasons engineers choose 90/10 copper nickel pipe is its strong resistance to seawater corrosion. It performs well in both clean seawater and brackish water environments.
Good Resistance to Biofouling
Copper nickel alloys naturally resist marine organism attachment. This helps keep piping systems cleaner and reduces maintenance frequency.
Reliable Performance in Flowing Seawater
90/10 CuNi pipe has good resistance to erosion corrosion, especially when the flow velocity is properly controlled. This makes it suitable for seawater cooling lines and shipboard piping.
Good Thermal Conductivity
For heat exchanger and condenser tube applications, 90/10 copper nickel tube offers stable heat transfer performance and long service life.
Easy Fabrication and Welding
CuNi 90/10 pipe and tube can be welded, bent, flanged, and fabricated using standard industrial processes. We can also supply matched copper nickel fittings and copper nickel flanges for complete piping systems.
Common Standards
Our 90/10 copper nickel pipes and tubes can be manufactured according to major international standards, including:
- ASTM B466 / ASTM B467
- ASTM B111 for heat exchanger and condenser tubes
- ASME SB466 / ASME SB467
- DIN 86019 / DIN 86007
- EEMUA 144 / 234
- BS 2871
- EN 12449 / EN 12451
- JIS H3300
- MIL-T-16420, when required
Material Grades Available
We supply 90/10 copper nickel pipe and tube in commonly used equivalent grades:
| Standard | Grade |
| UNS | C70600 |
| ASTM | C70600 |
| EN | CuNi10Fe1Mn |
| DIN | CuNi10Fe |
| JIS | C7060 |
| ISO | CuNi10Fe1Mn |
For applications requiring higher nickel content and stronger resistance to high-velocity seawater, please check our 70/30 copper nickel tube product page.
90/10 (UNS C70600) CuNi Pipe Chemical Composition
Typical chemical composition of C70600 / CuNi 90/10:
| KME CuNi90/10 | DIN 17664 2.0882 | BS 2871 CN102 | ASTM B466 C70600 | JIS H3300 C7060T | DIN 86019 2.1972 | EEMUA 234 UNS 7060X | GB/T 5231 BFe10-1.6-1 | |
| Ni% | 10.0-11.0 | 9.0-11.0 | 10.0-11.0 | 9.0-11.0 | 9.0-11.0 | 9.0-11.0 | 10.0-11.0 | 9.0-11.0 |
| Fe% | 1.5-1.8 | 1.0-2.0 | 1.0-2.0 | 1.0-1.8 | 1.0-1.8 | 1.5-1.8 | 1.5-2.0 | 1.5-1.8 |
| Mn% | 0.6-1.0 | 0.5-1.0 | 0.5-1.0 | max.1.0 | 0.2-1.0 | 0.5-1.0 | 0.5-1.0 | 0.5-1.0 |
| C% | max.0.05 | max.0.05 | max.0.05 | max.0.05 | max.0.05 | max.0.05 | max.0.05 | |
| Pb% | max.0.01 | max.0.03 | max.0.01 | max.0.02 | max.0.05 | max.0.01 | max.0.01 | max.0.03 |
| S% | max.0.005 | max.0.02 | max.0.05 | max.0.02 | max.0.005 | max.0.02 | max.0.01 | |
| P% | max.0.02 | max.0.02 | max.0.02 | max.0.02 | max.0.02 | max.0.02 | ||
| Zn% | max.0.05 | max.0.50 | max.0.50 | max.0.50 | max.0.05 | max.0.20 | max.0.20 | |
| Other | max.0.20 | max.0.30 | max.0.20 | max.0.30 | max.0.40 | |||
| Cu% | rem. | rem. | rem. | rem. | +Ni+Fe+Mn min99.5 | rem. | rem. | rem. |
Actual composition can be tested and reported by third-party laboratories if required by the project.
Mechanical Properties
Typical mechanical properties vary depending on product form, size, temper, and standard.
| Property | Typical Value |
| Tensile Strength | ≥ 275 MPa |
| Yield Strength | ≥ 105 MPa |
| Elongation | ≥ 30% |
| Density | Approx. 8.94 g/cm³ |
| Melting Point | Approx. 1100°C |
All products can be supplied with mill test certificates. Additional inspection, including PMI, ultrasonic testing, eddy current testing, hydrostatic testing, and visual inspection, can be arranged.
Applications of 90/10 Copper Nickel Pipe and Tube
90/10 copper nickel pipe and tube is used where seawater corrosion resistance, strength, and long-term stability are required.
Common applications include:
- Shipbuilding and ship repair
- Offshore oil and gas platforms
- Seawater cooling systems
- Ballast water systems
- Fire water systems
- Desalination plants
- Power plant condensers
- Heat exchangers
- Hydraulic and pneumatic lines
- Marine fuel and lubrication systems
- Coastal industrial facilities
- Aquaculture and seawater intake systems
For marine projects, customers often purchase CuNi pipe together with marine copper nickel fittings to ensure material compatibility across the entire system.
Why Choose 90/10 Copper Nickel for Marine Piping?
Marine piping systems work in demanding conditions. Saltwater, oxygen, suspended solids, changing temperature, vibration, and continuous flow can shorten the service life of ordinary metals.
90/10 copper nickel pipe provides a balanced solution. It is more corrosion-resistant than many copper alloys and more cost-effective than higher nickel alloys in many seawater applications. It also has a long history of successful use in vessels, offshore facilities, and coastal plants.
For many engineers, the advantage is simple: less downtime, fewer replacements, and more stable operation over the life of the system.
Seamless vs Welded 90/10 Copper Nickel Pipe
Both seamless and welded 90/10 copper nickel pipes are available. The right choice depends on pressure rating, size, installation environment, and project specifications.
Seamless Pipe
Seamless 90/10 copper nickel pipe is often selected for high-pressure or critical service conditions. It has uniform structure and no welded seam.
Welded Pipe
Welded CuNi pipe is a cost-effective option for larger diameters and general seawater piping systems. With proper welding and inspection, welded pipe can deliver reliable performance in marine applications.
If you are not sure which type is suitable, send us your drawing or bill of materials. Our team can help compare the options based on your technical requirements.
90/10 Copper Nickel Pipe Testing and Inspection
To ensure consistent quality, every batch of 90/10 Copper Nickel Pipe and Tube can be inspected according to customer requirements.
Available tests include:
- Chemical composition analysis
- Mechanical property testing
- Dimensional inspection
- Visual inspection
- Eddy current testing
- Ultrasonic testing
- Hydrostatic pressure testing
- Flattening test
- Flaring test
- Hardness test
- PMI test
- Third-party inspection by SGS, BV, ABS, LR, DNV, or other agencies
Certificates can include EN 10204 3.1 or 3.2, depending on project requirements.
Surface Finish and Packaging
Surface finish can be supplied according to application needs:
- Pickled surface
- Bright surface
- Polished surface
- Mill finish
- Cleaned and capped ends
For export orders, pipes and tubes are packed with proper protection to reduce damage during transportation. Small diameter tubes are usually bundled or packed in wooden cases. Large pipes can be protected with end caps, waterproof wrapping, and steel frames when necessary.
Custom Fabrication Service
Besides standard pipe and tube supply, we can provide value-added fabrication services:
- Cutting to required length
- Bending and U-bending
- Beveling
- Flanging
- Drilling
- Welding preparation
- Pipe spool prefabrication
- Marking according to project code
FAQs about 90/10 Copper Nickel Pipe
What is 90/10 Copper Nickel Pipe and Tube?
90/10 copper nickel pipe and tube is a copper-nickel alloy product containing about 90% copper and 10% nickel, with iron and manganese added for improved seawater corrosion resistance. It is widely used in marine, offshore, and heat exchanger systems.
What is the difference between 90/10 and 70/30 copper nickel?
90/10 copper nickel contains about 10% nickel, while 70/30 copper nickel contains about 30% nickel. 70/30 copper nickel usually offers higher resistance to high-velocity seawater and more severe marine conditions, but 90/10 is more cost-effective for many standard seawater applications.
Is 90/10 copper nickel suitable for seawater?
Yes. 90/10 copper nickel pipe and tube is one of the most commonly used materials for seawater piping systems because it has excellent corrosion resistance and good resistance to marine biofouling.
Can you supply ASTM B466 C70600 pipe?
Yes. We can supply ASTM B466 C70600 seamless copper nickel pipe, as well as ASTM B467 welded copper nickel pipe and ASTM B111 C70600 heat exchanger tubes.
Do you provide third-party inspection?
Yes. Third-party inspection by SGS, BV, ABS, LR, DNV, TÜV, or other agencies can be arranged according to customer or project requirements.
Can you supply copper nickel fittings together with pipe?
Yes. We can provide 90/10 copper nickel fittings, flanges, elbows, tees, reducers, stub ends, and complete pipe spool packages. You can find more related products in our copper nickel fittings section.
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