High Quality Copper Nickel (CuNi) 90/10 Pipes & Tubes
Seamless • Welded • Durable & Precise
Get a QuoteWhat is Copper Nickel 90/10?
Copper Nickel 90/10, also referred to as Cu-Ni 90/10 or UNS C70600, is composed of approximately 90% copper and 10% nickel. It offers outstanding resistance to seawater corrosion, stress corrosion cracking, and biofouling, along with excellent ductility and weldability. This alloy is widely used in marine engineering, power generation, and condenser systems due to its combination of corrosion resistance and mechanical strength.
Copper Nickel 90/10 Chemical Composition
Copper (Cu)
Nickel (Ni)
Iron (Fe)
Manganese (Mn)
Lead (Pb) Max
Zinc (Zn) Max
Carbon (C) Max
Phosphorus (P) Max
Sulfur (S) Max
Types of Copper Nickel 90/10 Pipes & Tubes
Ratnadeep Steel & Engg. Co. manufactures high-quality Copper Nickel 90/10 seamless and welded pipes & tubes, designed to perform reliably in marine, offshore, and power generation applications where exceptional resistance to seawater and scaling is required.
Seamless Cu-Ni 90/10 pipes are manufactured from solid billets to provide superior strength and corrosion resistance. Their smooth inner surfaces and homogeneous structure make them suitable for high-pressure systems and critical marine applications requiring long-term durability.
Welded Cu-Ni 90/10 pipes are a cost-effective solution for general seawater service, condensers, and shipbuilding applications. These pipes offer excellent weldability, consistent corrosion performance, and long operational life, even under fluctuating temperature and pressure conditions.
Specification of Copper Nickel 90/10 Seamless / Welded Pipes and Tubes
| Specification | Details |
|---|---|
| Specification | ASTM B466, B467, B111 / ASME SB466, SB467, SB111 |
| Standard | ASTM, ASME and API |
| Size | 1/2″ TO 6″ IN OD & NB IN Various SWG & SCH |
| Outer Diameter | 4.00 to 22.00 mm |
| Wall Thickness | Between 0.15mm and 1.50 mm |
| Type | Seamless / ERW / Welded / Fabricated Pipes |
| Form | Round, Square, Rectangular, Oval, Hydraulic Etc |
| Length | Single Random, Double Random & Required Length |
| End | Plain End, Beveled End, Treaded |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Inspection, Test Reports | Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports, Destructive Test Report, Non Destructive Test Reports |
| Packing | Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests |
| Specials | Sizes and Specifications other than above can be manufactured on request |
CHEMICAL COMPOSITION OF COPPER NICKEL 90/10 PIPES & TUBES
| Grade | Cu | Mn | Pb | Ni | Fe | Zn |
|---|---|---|---|---|---|---|
| Cu-Ni 90-10 | 88.6 min | 1.0 max | 0.05 max | 9-11 max | 1.8 max | 1 max |
MECHANICAL PROPERTIES OF CU-NI 90/10 PIPES AND TUBING
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength, ultimate | 303-414 MPa | 43900-60000 psi |
| Tensile strength, yield (depending on temper) | 110-393 MPa | 16000-57000 psi |
| Elongation at break (in 254 mm) | 42.00% | 42.00% |
| Machinability (UNS C36000 (free-cutting brass) = 100%) | 20% | 20% |
| Shear modulus | 52.0 GPa | 7540 ksi |
| Poisson’s ratio | 0.34 | 0.34 |
| Elastic modulus | 140 GPa | 20300 ksi |
PHYSICAL PROPERTIES OF CUPRO NICKEL 90/10 PIPES & TUBES
| Properties | Metric | Imperial |
|---|---|---|
| Density | 8.94 g/cm³ | 0.323 lb/in³ |
💡 Practical Difference in Use
Use Copper Nickel 90/10 when: excellent corrosion resistance in seawater with good cost-effectiveness is needed for general marine applications.
→ Example: seawater piping, condensers, heat exchangers, marine hardware.
Use Copper Nickel 70/30 when: superior corrosion resistance in more aggressive seawater conditions and higher strength are required. → Example: offshore platforms, high-velocity seawater systems, critical marine components.
Uses of Copper Nickel 90/10 Pipes and Tubes
The uses are defined by their excellent corrosion resistance in seawater, good biofouling resistance, and cost-effectiveness for marine applications.
- Marine and Shipbuilding Applications: This is their primary function. Used for seawater cooling systems, fire mains, ballast systems, and various piping applications in ships and vessels.
- Heat Exchanger and Condenser Tubes: Ideal for power plant condensers, heat exchangers, and cooling systems using seawater or brackish water as coolant.
- Desalination and Water Treatment: Excellent for handling seawater in desalination plants, water treatment facilities, and industrial cooling water systems.
When to Choose Copper Nickel 90/10 vs. Copper Nickel 70/30?
This is a critical question. Copper Nickel 90/10 offers excellent seawater corrosion resistance with better cost-effectiveness, while 70/30 provides superior performance in more demanding conditions.
Choose Copper Nickel 90/10 when:
- Cost-effectiveness is important for marine applications
- Good general seawater corrosion resistance is sufficient
- Applications involve moderate seawater velocity and conditions
- Budget constraints require optimal performance at lower cost
Upgrade to Copper Nickel 70/30 when:
- Superior corrosion resistance in aggressive seawater is required
- Higher strength and better erosion-corrosion resistance are needed
- Applications involve high seawater velocity or sand abrasion
- Long-term reliability in critical marine systems is paramount
Industries That Use Copper Nickel 90/10 Pipes and Tubes
Copper Nickel 90/10 alloys are essential in industries requiring good seawater corrosion resistance with cost-effectiveness. Here are the most prominent applications:
This is the primary consumer of CuNi 90/10 due to its excellent balance of corrosion resistance and cost.
Uses
Seawater cooling pipes, firefighting systems, ballast water piping, and general marine piping in commercial vessels.
Why CuNi 90/10?
Excellent seawater corrosion resistance, good biofouling resistance, and cost-effectiveness for marine applications.
Widely used in coastal power stations for seawater cooling systems.
Uses
Condenser tubes, heat exchanger tubes, cooling water systems, and auxiliary cooling circuits in thermal power plants.
Why CuNi 90/10?
Reliable performance in seawater cooling with good heat transfer properties and corrosion resistance.
Essential for handling seawater in water treatment and desalination processes.
Uses
Heat exchanger tubes, evaporator sections, brine handling systems, and seawater intake piping.
Why CuNi 90/10?
Good resistance to seawater corrosion and biofouling in desalination environments.
Used in various seawater systems on offshore oil and gas platforms.
Uses
Seawater cooling systems, fire water mains, utility water piping, and platform service water systems.
Why CuNi 90/10?
Cost-effective solution for seawater handling with good corrosion resistance in offshore environments.
Used in industrial plants located near seawater for cooling and process applications.
Uses
Cooling water circuits, heat exchangers, and process cooling systems in coastal refineries and plants.
Why CuNi 90/10?
Good resistance to seawater corrosion while maintaining cost-effectiveness for industrial applications.
Used in various marine structures and coastal construction projects.
Uses
Water intake systems, outfall pipes, marine piling protection, and coastal infrastructure piping.
Why CuNi 90/10?
Excellent corrosion resistance in seawater with good durability for marine construction applications.
Used in fish farming and marine culture facilities.
Uses
Water circulation systems, aeration pipes, and seawater handling in fish farms and hatcheries.
Why CuNi 90/10?
Good biofouling resistance reduces maintenance, while being cost-effective for aquaculture operations.
Used in coastal buildings and facilities requiring seawater cooling.
Uses
Seawater-cooled HVAC systems, heat rejection systems, and building service water pipes in coastal areas.
Why CuNi 90/10?
Cost-effective solution for seawater cooling in building services with good corrosion resistance.
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