Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of uns c70600 copper nickel alloy (90-10 cu-ni) in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
UNS C70600 is a copper-nickel alloy containing approximately 90% copper and 10% nickel, enhanced with controlled additions of iron and manganese. Unlike standard copper tubing, this alloy is specifically engineered for continuous exposure to seawater, brackish water and chloride-rich environments.
The combination of copper, nickel, iron and manganese enables the formation of a stable protective surface film that significantly reduces corrosion rates and inhibits marine organism attachment. This characteristic makes C70600 one of the most widely specified copper-nickel alloys for marine heat transfer and fluid transportation systems.
Xi'an Dongmeng Group Co., Ltd supplies UNS C70600 seamless and welded tubes manufactured under strict quality control procedures, providing reliable performance for shipyards, EPC contractors, power plants and desalination facilities worldwide.
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High Quality
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Advanced Equipment
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Professional Team
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Custom Service
Products Description
UNS C70600 is a copper-nickel alloy containing approximately 90% copper and 10% nickel, with trace amounts of iron and manganese. It is commonly referred to as a 90/10 copper-nickel alloy. This alloy exhibits excellent corrosion resistance, anti-corrosion properties, and resistance to biofouling in seawater and other environments. It demonstrates good corrosion resistance in both clean and partially polluted seawater and bay water, and is widely used in heat exchangers in power plants, desalination plants, and petrochemical plants that utilize seawater. This alloy also possesses strong resistance to stress corrosion, cracking, and pitting corrosion.
Keywords: UNS C70600, Copper Nickel 90/10, CuNi10Fe1Mn, CW352H, ASTM B111 Copper Nickel Tube, Seawater Condenser Tube, Marine Heat Exchanger Tube, Cu-Ni Pipe, Copper Nickel Alloy Supplier.
Chemical Composition (Typical %)
| Element | Cu | Ni | Fe | Mn | Pb | Zn | Others |
|---|---|---|---|---|---|---|---|
| Content (%) | 88.6 – 90.6 | 9.0 – 11.0 | 1.0 – 1.8 | 0.5 – 1.0 | ≤0.02 | ≤0.50 | Balance |
Mechanical Properties (Typical)
| Property | Annealed | Cold Worked (H55) | Standard |
|---|---|---|---|
| Tensile Strength (MPa) | 275 – 345 | 380 – 450 | ASTM B111 |
| Yield Strength (0.2% offset, MPa) | 110 – 125 | 130 – 170 | ASTM B111 |
| Elongation (%) | ≥30 | ≥20 | ASTM B111 |
| Hardness (HV) | 80 – 100 | 100 – 130 | ASTM B111 |
| Density | 8.9 g/cm³ | - | - |
| Thermal Conductivity | 50 – 60 W/m·K | - | - |
| Electrical Conductivity | ~6% IACS | - | - |
| Max Working Temp | 300°C (572°F) | - | - |
Physical Properties
| Property | Value |
|---|---|
| Density | 8.94 g/cm³ |
| Melting Range | 1090–1145°C |
| Thermal Conductivity | 50 W/m·K |
| Electrical Conductivity | 7% IACS |
| Thermal Expansion | 17 ×10⁻⁶/K |
Product Forms & Standard Sizes
Why Engineers Select C70600 Instead of Conventional Copper Tubes
Excellent Seawater Durability
The alloy maintains stable performance in flowing seawater systems and demonstrates superior resistance to pitting and crevice attack compared with many conventional copper alloys.
Natural Biofouling Resistance
Copper ions released from the surface discourage the growth of marine organisms, reducing maintenance frequency and improving operational efficiency.
High Heat Transfer Efficiency
The alloy combines corrosion resistance with favorable thermal conductivity, making it highly suitable for condensers, evaporators and cooling circuits.
Reliable Long-Term Service
Many marine systems operate with C70600 tubing for decades with minimal degradation when proper flow conditions are maintained.
Fabrication & Manufacturing Characteristics
| Processing Method | Performance |
|---|---|
| Cold Drawing | Excellent |
| Tube Expansion | Excellent |
| Bending | Excellent |
| Rolling | Good |
| Machining | Fair |
| Forming | Excellent |
The alloy exhibits good ductility and can be fabricated into complex tube assemblies, coils and heat exchanger components without significant loss of mechanical integrity.
Welding Performance
UNS C70600 demonstrates excellent weldability using common welding processes including:
GTAW (TIG)
GMAW (MIG)
SMAW
Plasma Welding
The alloy maintains corrosion resistance across welded joints when suitable filler metals and welding procedures are applied.
Corrosion Resistance Analysis
Seawater Systems
Outstanding resistance to flowing seawater and marine atmospheric exposure.
Desalination Equipment
Widely utilized in brine heaters, evaporators and seawater intake systems.
Offshore Platforms
Suitable for firewater systems, cooling circuits and offshore process piping.
Industrial Cooling Water
Provides long service life under chloride-containing cooling water conditions.
Major Industry Applications
Marine Shipbuilding
Cooling water systems
Condenser tubing
Ballast water pipelines
Shipboard heat exchangers
Offshore Oil & Gas
Firewater systems
Seawater lift systems
Offshore process cooling
Power Generation
Surface condensers
Turbine cooling systems
Heat recovery units
Desalination Plants
Brine heaters
Evaporators
Seawater intake pipelines
Industrial Heat Transfer
Shell & tube heat exchangers
Chillers
Cooling towers
Inspection & Quality Assurance
Every batch of UNS C70600 tubes can be supplied with:
PMI Material Verification
Chemical Analysis
Mechanical Testing
Hydrostatic Testing
Eddy Current Testing
Ultrasonic Testing
Dimensional Inspection
EN10204 3.1 MTC
Third Party Inspection (SGS / TUV / BV)
Packaging & Export Logistics
Plastic End Caps Protection
Anti-Corrosion Wrapping
Export Wooden Cases
Fumigation-Free Plywood Crates
Seaworthy Export Packaging
Containerized Shipment
Available for:
LCL Shipment
FCL Shipment
Project Cargo
Emergency Air Freight
Why Choose Xi'an Dongmeng Group Co., Ltd
✓ 20+ Years Non-Ferrous Metal Manufacturing Experience
✓ OEM & Custom Dimensions Available
✓ Complete ASTM / ASME Compliance
✓ Strict Traceability System
✓ Global Export Experience
✓ Fast Production Lead Time
✓ Third-Party Inspection Support
✓ Professional Technical Team
FAQ
Is C70600 suitable for direct seawater service?
Yes. It is one of the most widely specified copper-nickel alloys for continuous seawater exposure.
What is the difference between C70600 and C71500?
C70600 contains approximately 10% nickel, while C71500 contains around 30% nickel and offers higher seawater erosion resistance.
Can C70600 be used for heat exchangers?
Yes. It is extensively used in condensers, evaporators and marine heat transfer systems.
Does the alloy resist marine fouling?
Yes. Copper-nickel alloys naturally reduce marine organism attachment.
Is custom length available?
Yes. OEM dimensions and cut-to-length services are available.
Packaging & Supply Details
Length: 3 m / 6 m standard or custom cut
Finish: Bright annealed, mill finish, or polished
Marking: Size + alloy grade + heat number + ASTM standard
Packing: Seaworthy wooden cases or plastic-capped bundles
Certificates: ASTM, EN, ISO 9001, MTC 3.1 included
Looking for a trusted UNS C70600 Copper Nickel 90/10 manufacturer or exporter?
We specialize in seamless CuNi tubes, plates, rods, fittings, and flanges for marine and industrial applications, meeting ASTM B111 / EN 12451 standards.
✅ Custom sizes & OEM machining
✅ Global export with seaworthy packaging
✅ Professional material test reports & certificates
📞 Get a Fast Quote Today!
Our address
Room 4107, Runfeng Building, Sanqiao New Street, Weiyang District, Xi'an City, Shaanxi Province
Phone Number
+86 15769214734
office@dongmjd.com
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