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Copper Nickel 90/10 Pipes & Tubes (CuNi 90/10)
Product Overview
Copper Nickel 90/10 Pipes & Tubes (CuNi 90/10) supplied by R V Metal Corporation are engineered for demanding marine, offshore, and industrial heat-transfer applications where long-term reliability in corrosive environments is critical. The Cu-Ni 90/10 alloy, containing approximately 90% copper and 10% nickel, offers exceptional resistance to seawater corrosion, erosion, and biofouling, making it a globally preferred material for condenser tubes, heat exchangers, seawater piping, and shipbuilding systems. These pipes and tubes maintain stable mechanical properties under continuous flow conditions, exhibit excellent thermal conductivity, and allow safe fabrication through bending, flaring, expanding, and welding when correct procedures are followed. R V Metal Corporation supplies Copper Nickel 90/10 pipes and tubes in seamless or welded form, across standard and customized dimensions, with full traceability and mill test certification, ensuring compliance with international standards and EPC-grade project requirements.
Technical Specifications
| Technical Specifications – Copper Nickel 90/10 Pipes & Tubes (CuNi 90/10) | |
|---|---|
| Material Grade | Copper Nickel 90/10 (CuNi 90/10) |
| UNS Designation | C70600 |
| Nickel Content | 9.0 – 11.0 % |
| Copper Content | Balance |
| Manufacturing Type | Seamless / Welded (ERW on request) |
| Outer Diameter Range | 6.00 mm to 273.00 mm (1/4" to 10") |
| Wall Thickness Range | 0.7 mm to 20.0 mm (as per standard & project requirement) |
| Standard Lengths | 3 m, 6 m, 12 m, Cut-to-Length |
| Form Supplied | Straight Lengths / Coils (small OD) |
| Temper / Condition | Annealed (O61) / As Drawn (H80) |
| Surface Finish | Mill Finish / Pickled / Polished (on request) |
| Applicable Standards | ASTM B466 / B467, EN 12451, BS 2871, DIN 86019 |
| Operating Temperature | -196°C to +300°C |
| Pressure Rating | As per OD, wall thickness, and applicable standard |
| Corrosion Resistance | Excellent resistance to seawater, brackish water, erosion & biofouling |
| Fabrication Compatibility | Bending, Flaring, Expanding, Welding (TIG/MIG), Brazing |
| Testing & Inspection | Eddy Current, Hydrostatic Test, Dimensional & Visual Inspection |
| Certification | Mill Test Certificate (EN 10204 3.1) |
| Typical Applications | Heat Exchangers, Condensers, Seawater Piping, Marine & Offshore Systems |
Chemical Composition
| Chemical Composition – Copper Nickel 90/10 Pipes & Tubes (CuNi 90/10) | ||
|---|---|---|
| Element | Symbol | Composition (% by Weight) |
| Copper | Cu | Balance |
| Nickel | Ni | 9.0 – 11.0 |
| Iron | Fe | 1.0 – 1.8 |
| Manganese | Mn | ≤ 1.0 |
| Zinc | Zn | ≤ 0.5 |
| Lead | Pb | ≤ 0.02 |
| Carbon | C | ≤ 0.05 |
| Sulfur | S | ≤ 0.02 |
| Other Elements | — | ≤ 0.2 (Total) |
UNS Codes & Grades
| UNS Codes & Grades – Copper Nickel 90/10 Pipes & Tubes | |||
|---|---|---|---|
| Material Grade | UNS Designation | Common Name | Typical Standards |
| Copper Nickel 90/10 | C70600 | CuNi 90/10 | ASTM B111, ASTM B466, ASTM B467 |
| Copper Nickel 90/10 (Seamless Tube) | C70620 | CuNi 90/10 – Condenser Tube Grade | ASTM B111 |
| Copper Nickel 90/10 (Pipe) | C70630 | CuNi 90/10 – Pipe Grade | ASTM B466 |
| Copper Nickel 90/10 (Heat Exchanger Tube) | C70640 | CuNi 90/10 – Heat Exchanger / Condenser | ASTM B111, ASME SB111 |
| CuNi 90/10 (Marine Grade) | C70600 | Marine Copper Nickel 90/10 | BS 2871 CN102, EN 12451 CW352H |
Mechanical, Physical & Fabrication Properties
| Mechanical, Physical & Fabrication Properties – Copper Nickel 90/10 Pipes & Tubes | |||
|---|---|---|---|
| Property Category | Property | Typical Value | Remarks / Industry Notes |
| Mechanical | Tensile Strength | 360 – 450 MPa | Excellent strength retention under marine and seawater conditions |
| Yield Strength (0.2% Offset) | 120 – 170 MPa | Good resistance to deformation in piping systems | |
| Elongation | 30 – 45 % | High ductility, suitable for bending and expansion | |
| Hardness | 80 – 120 HB | Varies with temper (annealed to hard-drawn) | |
| Physical | Density | 8.94 g/cm³ | Comparable to pure copper |
| Melting Range | 1170 – 1240 °C | Stable at elevated temperatures | |
| Thermal Conductivity | 50 – 60 W/m·K | Lower than copper, ideal for controlled heat exchange | |
| Electrical Resistivity | 0.19 – 0.22 µΩ·m | Non-electrical grade, optimized for corrosion resistance | |
| Coefficient of Thermal Expansion | 16.5 × 10⁻⁶ /°C | Low expansion minimizes thermal stress | |
| Fabrication | Formability | Excellent | Suitable for cold bending and expansion |
| Weldability | Excellent | TIG/MIG welding recommended with CuNi filler metals | |
| Brazability | Good | Requires controlled atmosphere to prevent oxidation | |
| Machinability | Moderate | Better than stainless steels, lower than brass | |
| Corrosion Resistance | Outstanding | Highly resistant to seawater, biofouling & erosion corrosion | |
Common Names & International Identifiers
| Common Names & International Identifiers – Copper Nickel 90/10 Pipes & Tubes | |||
|---|---|---|---|
| Region / Standard Body | Common Name | Grade / Designation | Notes / Industry Usage |
| UNS (USA) | Copper Nickel 90/10 | C70600 | Most widely accepted global designation for Cu-Ni 90/10 |
| ASTM | 90/10 Copper Nickel Alloy | ASTM B466 / B467 | Seamless & welded pipes and tubes for marine service |
| EN (Europe) | CuNi10Fe1Mn | EN CW352H | European standard with iron & manganese for strength |
| DIN (Germany) | CuNi10Fe1Mn | DIN 2.0872 | Used in shipbuilding & offshore heat exchangers |
| BS (UK) | 90/10 Copper Nickel | BS 2871 Part 1 CN102 | Condenser and marine piping applications |
| ISO | Copper-Nickel Alloy 90/10 | ISO 1634 CuNi10Fe1Mn | International harmonized designation |
| JIS (Japan) | Copper Nickel Alloy | JIS H3300 C7060T | Heat exchanger & desalination plant tubes |
| AFNOR (France) | CuNi10Fe1Mn | NF A51-102 | Marine & seawater piping systems |
| Trade / Industry | Cu-Ni 90/10 | — | Common shorthand used by EPCs & shipyards |
Standards & International Equivalents
| Standards & International Equivalents – Copper Nickel 90/10 Pipes & Tubes | ||||
|---|---|---|---|---|
| Country / Region | Standard Organization | Standard Number | Grade / Designation | Scope / Application Notes |
| USA | ASTM | ASTM B466 | C70600 | Seamless copper-nickel pipes for general & marine service |
| USA | ASTM | ASTM B467 | C70600 | Welded copper-nickel pipes for seawater systems |
| USA | ASTM | ASTM B111 | C70600 | Condenser & heat exchanger tubes |
| Europe | EN | EN 12451 | CW352H (CuNi10Fe1Mn) | Seamless round tubes for heat exchangers |
| Europe | EN | EN 12452 | CW352H | Seamless pipes for pressure & marine use |
| Germany | DIN | DIN 86019 | CuNi10Fe1Mn | Shipbuilding & offshore piping systems |
| United Kingdom | BS | BS 2871 Part 1 | CN102 | Marine condenser & cooler tubes |
| International | ISO | ISO 1634 | CuNi10Fe1Mn | Global standard for copper-nickel wrought products |
| Japan | JIS | JIS H3300 | C7060T | Heat exchanger, desalination & seawater piping |
| France | AFNOR | NF A51-102 | CuNi10Fe1Mn | Marine & offshore fluid handling systems |
| India | IS | IS 1545 | Cu-Ni 90/10 | Heat exchanger & condenser tubes |
Applications
| Applications of Copper Nickel 90/10 Pipes & Tubes | |||
|---|---|---|---|
| Industry / Sector | Application Area | Function / Use | Why Copper Nickel 90/10 is Used |
| Marine & Shipbuilding | Seawater Cooling Lines | Circulation of seawater for engine & auxiliary cooling | Excellent resistance to seawater corrosion, biofouling, and erosion |
| Marine & Offshore | Ballast Water Systems | Filling and discharge of ballast water | High durability in stagnant and flowing seawater environments |
| Power Plants | Condenser & Heat Exchanger Tubes | Heat transfer using seawater or brackish water | Stable thermal conductivity and long service life |
| Desalination Plants | Evaporators & Brine Heaters | Handling high-salinity hot seawater | Resistant to chloride attack and stress corrosion cracking |
| Oil & Gas (Offshore) | Fire Water & Cooling Systems | Fire protection and equipment cooling lines | High reliability and minimal maintenance in offshore conditions |
| HVAC & Industrial Cooling | Seawater Air Conditioning (SWAC) | Cooling using seawater in coastal facilities | Excellent fouling resistance and energy-efficient heat transfer |
| Chemical & Process Industry | Corrosive Fluid Pipelines | Transport of mildly corrosive liquids | Superior corrosion resistance compared to carbon steel |
| Renewable Energy | Offshore Wind & Tidal Systems | Cooling and auxiliary piping | Proven long-term performance in marine exposure |
| Naval & Defense | Submarine & Warship Systems | Seawater piping and heat exchangers | Non-magnetic, corrosion-resistant, and low maintenance |
| Ports & Harbours | Seawater Intake & Discharge Lines | Raw seawater handling | High resistance to marine growth and long service intervals |
Standard Copper Nickel 90/10 Pipes & Tubes Dimensional Chart
NOTE:
- Weights are theoretical (CuNi 90/10 density assumed 8.94 g/cm³).
- Actual weight varies due to OD/WT tolerance, ovality, and finish.
- Weight shown as kg/m with (lb/ft) in brackets.
| Nominal OD | Outside Diameter (mm) |
Outside Diameter (inch) |
Wall Thickness (WT) → Theoretical Weight | |||||
|---|---|---|---|---|---|---|---|---|
| WT 0.9 mm kg/m (lb/ft) |
WT 1.2 mm kg/m (lb/ft) |
WT 1.5 mm kg/m (lb/ft) |
WT 2.0 mm kg/m (lb/ft) |
WT 2.5 mm kg/m (lb/ft) |
WT 3.0 mm kg/m (lb/ft) |
|||
| 1/4" | 6.35 | 0.250 | 0.152 (0.102) | 0.198 (0.133) | 0.244 (0.164) | 0.316 (0.213) | 0.386 (0.259) | 0.455 (0.306) |
| 3/8" | 9.52 | 0.375 | 0.232 (0.156) | 0.303 (0.204) | 0.373 (0.251) | 0.484 (0.325) | 0.593 (0.398) | 0.700 (0.471) |
| 1/2" | 12.70 | 0.500 | 0.312 (0.210) | 0.408 (0.274) | 0.503 (0.338) | 0.653 (0.439) | 0.801 (0.538) | 0.946 (0.636) |
| 5/8" | 15.88 | 0.625 | 0.392 (0.263) | 0.513 (0.345) | 0.633 (0.425) | 0.822 (0.552) | 1.008 (0.677) | 1.191 (0.800) |
| 3/4" | 19.05 | 0.750 | 0.472 (0.317) | 0.618 (0.415) | 0.763 (0.513) | 0.991 (0.666) | 1.216 (0.817) | 1.437 (0.966) |
| 1" | 25.40 | 1.000 | 0.632 (0.425) | 0.829 (0.557) | 1.025 (0.689) | 1.336 (0.898) | 1.644 (1.105) | 1.948 (1.309) |
| 1-1/4" | 31.75 | 1.250 | 0.793 (0.533) | 1.039 (0.698) | 1.286 (0.864) | 1.680 (1.129) | 2.069 (1.390) | 2.455 (1.649) |
| 1-1/2" | 38.10 | 1.500 | 0.954 (0.641) | 1.250 (0.840) | 1.546 (1.039) | 2.023 (1.360) | 2.495 (1.676) | 2.962 (1.990) |
| 2" | 50.80 | 2.000 | 1.276 (0.857) | 1.674 (1.125) | 2.073 (1.392) | 2.717 (1.826) | 3.355 (2.254) | 3.987 (2.678) |
| 2-1/2" | 63.50 | 2.500 | 1.598 (1.074) | 2.099 (1.410) | 2.600 (1.747) | 3.412 (2.294) | 4.215 (2.833) | 5.011 (3.367) |
| 3" | 76.20 | 3.000 | 1.920 (1.291) | 2.524 (1.696) | 3.128 (2.102) | 4.107 (2.759) | 5.075 (3.409) | 6.035 (4.054) |
| 3-1/2" | 88.90 | 3.500 | 2.242 (1.507) | 2.948 (1.981) | 3.655 (2.456) | 4.802 (3.227) | 5.936 (3.989) | 7.059 (4.744) |
| 4" | 101.60 | 4.000 | 2.564 (1.724) | 3.373 (2.266) | 4.182 (2.809) | 5.497 (3.694) | 6.797 (4.567) | 8.083 (5.432) |
