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Copper Nickel Bars & Rods
Product Overview
Copper Nickel Bars & Rods supplied by R V Metal Corporation are engineered for high-performance applications where superior corrosion resistance, mechanical strength, and long-term reliability are critical. Manufactured from premium copper-nickel alloys such as CuNi 90/10 and CuNi 70/30, these bars and rods offer exceptional resistance to seawater, brine, and aggressive industrial environments, making them the material of choice for marine, offshore, desalination, heat exchanger, and power plant applications. The inherent anti-fouling characteristics, excellent thermal stability, and consistent metallurgical structure ensure dependable performance under continuous load, pressure, and temperature variations. Available in round, square, hexagonal, and flat forms with precise dimensional control and surface finish, Copper Nickel Bars & Rods from R V Metal Corporation meet stringent international standards and are trusted by EPC contractors, shipyards, OEMs, and industrial fabricators worldwide.
Technical Specifications
| Technical Specifications – Copper Nickel Bars & Rods | |
|---|---|
| Material Type | Copper Nickel Alloy Bars & Rods |
| Common Grades | CuNi 90/10, CuNi 70/30, CuNi 95/5, 66-30-2-2 Alloy |
| UNS Designations | C70600, C71500, C70400, C71640 |
| Manufacturing Process | Hot Extruded / Hot Rolled / Cold Drawn (as per size & application) |
| Available Forms | Round Bars, Square Bars, Hexagonal Bars, Flat Bars, Custom Profiles |
| Size Range |
Round Bars: 6 mm to 250 mm Square / Hex Bars: 10 mm to 120 mm Flats: Width 20 mm to 200 mm, Thickness 5 mm to 50 mm |
| Standard Lengths | 3 m, 4 m, 6 m or Cut-to-Length as per customer requirement |
| Temper / Condition | Annealed (O), Half-Hard, Hard, Hot Finished |
| Surface Finish | Mill Finish, Smooth Drawn, Polished, Pickled |
| Density | 8.9 g/cm³ (approx., grade dependent) |
| Tensile Strength |
CuNi 90/10: 360 – 480 MPa CuNi 70/30: 420 – 550 MPa |
| Yield Strength |
CuNi 90/10: ≥ 120 MPa CuNi 70/30: ≥ 150 MPa |
| Elongation | 30% – 45% (depending on temper and grade) |
| Thermal Conductivity | CuNi 90/10: ~50 W/m·K | CuNi 70/30: ~29 W/m·K |
| Electrical Resistivity | CuNi 90/10: ~0.20 µΩ·m | CuNi 70/30: ~0.34 µΩ·m |
| Corrosion Resistance | Excellent resistance to seawater, brine, biofouling, and industrial corrosion |
| Machinability | Good to Moderate (improved with proper tooling and lubrication) |
| Weldability | Excellent (TIG / MIG / Shielded Arc Welding compatible) |
| Standards | ASTM B151 / B122, EN 12163, EN 1652, DIN, BS, IS |
| Inspection & Testing | Dimensional Check, Chemical Analysis, Mechanical Testing, Ultrasonic Testing (on request) |
| Certification | Mill Test Certificate (EN 10204 – 3.1) available on request |
Chemical Composition
| Chemical Composition of Copper Nickel Bars & Rods | |||||
|---|---|---|---|---|---|
| Grade / Alloy | UNS No. | Copper (Cu) % | Nickel (Ni) % | Iron (Fe) % | Manganese (Mn) % |
| Copper Nickel 90/10 | C70600 | Balance (≈ 88.6 – 90.5) | 9.0 – 11.0 | 1.0 – 1.8 | 0.5 – 1.0 |
| Copper Nickel 70/30 | C71500 | Balance (≈ 66.5 – 69.5) | 29.0 – 33.0 | 0.4 – 1.0 | 0.5 – 1.0 |
| Copper Nickel 95/5 | C70400 | Balance (≈ 94.0 – 96.0) | 4.5 – 5.5 | 0.05 – 0.5 | 0.05 – 0.5 |
| 66-30-2-2 Alloy | C71640 | Balance (≈ 64.0 – 68.0) | 29.0 – 32.0 | 1.5 – 2.5 | 1.5 – 2.5 |
|
Notes: • Minor elements such as Zinc (Zn), Lead (Pb), Sulfur (S), and Carbon (C) are present only in trace amounts as per applicable standards. • Chemical composition complies with ASTM B151 / B122, EN 12163, EN 1652, BS, DIN, and equivalent international standards. • Exact composition can be customized for OEM and marine-grade requirements. |
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UNS Codes & Grades
| UNS Codes & Grades of Copper Nickel Bars & Rods | ||||
|---|---|---|---|---|
| Alloy Designation | UNS Number | Common Name | Nickel Content (%) | Typical Standards |
| CuNi 90/10 | C70600 | 90/10 Copper Nickel | 9 – 11 | ASTM B151, ASTM B122, EN 12163, EN 1652 |
| CuNi 70/30 | C71500 | 70/30 Copper Nickel | 29 – 33 | ASTM B151, ASTM B122, EN 12163, EN 1652 |
| CuNi 95/5 | C70400 | 95/5 Copper Nickel | 4 – 6 | ASTM B151, ASTM B122, EN 12163 |
| CuNi 66-30-2-2 | C71640 | Enhanced Strength Copper Nickel | 29 – 32 | ASTM B151, ASTM B122, EN 12163 |
| CuNi 30 (Low Iron) | C71520 | 70/30 CuNi – Low Fe | 29 – 33 | ASTM B151, ASTM B122 |
|
Notes: • Copper Nickel Bars & Rods are supplied in extruded, hot-rolled, cold-drawn, and machined conditions. • Iron and manganese additions improve strength, corrosion resistance, and seawater performance. • Grades are widely used in marine, offshore, heat exchanger, desalination, and defense applications. • Custom chemistry and dual-certified material can be supplied on request. |
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Mechanical, Physical & Fabrication Properties
| Mechanical, Physical & Fabrication Properties of Copper Nickel Bars & Rods | |||||||
|---|---|---|---|---|---|---|---|
| Property | Unit | CuNi 90/10 (C70600) |
CuNi 70/30 (C71500) |
CuNi 95/5 (C70400) |
CuNi 66-30-2-2 (C71640) |
Typical Condition | Remarks (EPC / Consultant Notes) |
| Density | g/cm³ | 8.94 | 8.95 | 8.92 | 8.96 | All tempers | Minor variation due to Ni/Fe/Mn content |
| Ultimate Tensile Strength | MPa | 300 – 360 | 360 – 450 | 280 – 330 | 400 – 480 | Cold-drawn / Extruded | 70/30 and 66-30-2-2 offer superior strength for marine duty |
| Yield Strength (0.2%) | MPa | 120 – 160 | 150 – 220 | 110 – 150 | 180 – 260 | Cold-worked | Increases with cold reduction |
| Elongation | % | 30 – 45 | 20 – 35 | 35 – 45 | 18 – 30 | Annealed | Good ductility for bending and forming |
| Hardness | HB | 80 – 120 | 100 – 150 | 75 – 110 | 120 – 170 | As supplied | Depends on temper (O / H) |
| Modulus of Elasticity | GPa | 150 | 155 | 145 | 155 | All | Lower than steel – good vibration damping |
| Thermal Conductivity | W/m·K | 50 – 60 | 35 – 45 | 60 – 65 | 30 – 40 | At 20°C | Decreases with higher Ni content |
| Electrical Conductivity | % IACS | 20 – 25 | 8 – 12 | 30 – 35 | 6 – 10 | Annealed | Not used where high conductivity is critical |
| Corrosion Resistance | — | Excellent | Outstanding | Very Good | Outstanding | Marine / Seawater | Resistant to biofouling & chloride attack |
| Machinability | Relative | Fair | Moderate | Good | Moderate | — | Use sharp carbide tools; lower speeds recommended |
| Weldability | — | Excellent | Excellent | Excellent | Excellent | GTAW / GMAW | Pre-cleaning essential; matching filler required |
| Formability | — | Very Good | Good | Very Good | Good | Annealed | Annealing recommended for tight bends |
| Operating Temperature Range | °C | -196 to +300 | -196 to +300 | -196 to +300 | -196 to +300 | Continuous service | No embrittlement at cryogenic temperatures |
|
Engineering Notes: • Copper Nickel Bars & Rods are non-sparking, non-magnetic, and highly resistant to stress corrosion cracking. • 70/30 and 66-30-2-2 grades are preferred for high-velocity seawater, offshore, and naval systems. • Annealed condition (O) is recommended for forming; cold-drawn (H) for strength-critical components. • Mechanical values are indicative; exact limits depend on standard, size, and temper. |
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Common Names & International Identifiers
| Common Names & International Identifiers of Copper Nickel Bars & Rods | |||||
|---|---|---|---|---|---|
| Common / Trade Name | Nominal Composition | UNS Designation | EN / DIN Designation | ISO / BS / ASTM References | Typical Industry Usage / Identifier |
| Copper Nickel 90/10 | Cu 90% – Ni 10% | C70600 | CuNi10Fe1Mn (EN CW352H) | ASTM B151 / B122 / B466 | Marine bars, seawater piping rods, heat exchanger components |
| Copper Nickel 70/30 | Cu 70% – Ni 30% | C71500 | CuNi30Mn1Fe (EN CW354H) | ASTM B151 / B122 / B466 | Naval, offshore structural rods, high-pressure marine systems |
| Copper Nickel 95/5 | Cu 95% – Ni 5% | C70400 | CuNi5Fe1Mn (EN CW351H) | ASTM B151 / B122 | Condenser rods, low-velocity seawater applications |
| 66-30-2-2 Copper Nickel | Cu 66% – Ni 30% – Fe 2% – Mn 2% | C71640 | CuNi30Fe2Mn2 | ASTM B466 / MIL-C-24679 | High-strength naval bars, propeller shafts, defense hardware |
| Marine Copper Nickel | Cu-Ni-Fe-Mn Alloy | C70600 / C71500 | CuNi10 / CuNi30 Series | ASTM / EN / ISO Marine Specs | Generic marine & offshore trade reference |
| Naval Copper Nickel | High Ni Cu-Ni Alloy | C71500 / C71640 | CuNi30 Family | MIL, DEF STAN, ASTM | Defense, shipbuilding, submarine components |
| Cupronickel | Copper–Nickel Alloy | Multiple (C70400–C71640) | CuNi Series | ISO 1634 / ASTM | Global commercial & engineering term |
| Nickel Brass (Industry Term) | Cu-Ni Based Alloy | — | — | Non-standard trade usage | Incorrect but sometimes used colloquially in markets |
|
Consultant / EPC Notes: • Always specify material using UNS or EN designation in technical documents to avoid ambiguity. • Trade names like “Cupronickel” or “Marine Copper Nickel” are descriptive, not contractual. • For critical marine and offshore projects, include standard + UNS + temper in BOQs and datasheets. • Bars & rods are typically supplied as extruded or cold-drawn to ASTM B151 / EN 12163 unless otherwise specified. |
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Standards & International Equivalents
| Standards & International Equivalents of Copper Nickel Bars & Rods | |||||
|---|---|---|---|---|---|
| Alloy / Grade | UNS (USA) | ASTM Standard | EN / DIN (Europe) | BS / ISO | Typical Specification Reference |
| Copper Nickel 90/10 | C70600 | ASTM B151 / B124 / B466 | EN CW352H (CuNi10Fe1Mn) | BS 2874 CN102 / ISO 1634 | Marine bars, seawater system rods, heat exchanger components |
| Copper Nickel 70/30 | C71500 | ASTM B151 / B124 / B466 | EN CW354H (CuNi30Mn1Fe) | BS 2874 CN107 / ISO 1634 | Naval, offshore, high-strength marine bars & shafts |
| Copper Nickel 95/5 | C70400 | ASTM B151 / B124 | EN CW351H (CuNi5Fe1Mn) | BS 2874 CN101 | Low-velocity seawater, condenser & structural rods |
| 66-30-2-2 Copper Nickel | C71640 | ASTM B466 | CuNi30Fe2Mn2 | MIL-C-24679 / DEF STAN | Defense, naval propulsion & high-load components |
| Cupronickel (General) | C70400–C71640 | ASTM B151 Series | EN 12163 / EN 1652 | ISO 1634 | Global engineering & EPC reference term |
| Marine Copper Nickel | C70600 / C71500 | ASTM B151 / B466 | EN CW352H / CW354H | BS / ISO Marine Specs | Shipbuilding, offshore & seawater service |
|
EPC / Consultant Notes: • For contractual clarity, always specify material as ASTM + UNS or EN designation. • Bars & rods are typically governed by ASTM B151 or EN 12163 unless otherwise agreed. • Marine and defense projects may additionally require MIL / DEF STAN compliance. • Temper condition (as-extruded, cold-drawn, stress relieved) must be stated in datasheets and BOQs. |
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Applications
| Applications of Copper Nickel Bars & Rods | |||
|---|---|---|---|
| Industry / Sector | Typical Components | Preferred Cu-Ni Grades | Why Copper Nickel is Used |
| Marine & Shipbuilding | Shafts, fasteners, valves, pump parts, seawater fittings | CuNi 90/10, CuNi 70/30 | Exceptional seawater corrosion resistance, biofouling resistance, long service life |
| Offshore & Oil & Gas | Structural rods, bolting, hydraulic components | CuNi 70/30, 66-30-2-2 | High strength, resistance to chloride stress corrosion and erosion |
| Heat Exchangers & Condensers | Support rods, tube sheets, tie rods | CuNi 90/10, CuNi 95/5 | Excellent thermal conductivity and resistance to seawater attack |
| Power Generation | Cooling system rods, fittings, bushings | CuNi 90/10, CuNi 70/30 | Stable mechanical properties at elevated temperatures and wet conditions |
| Desalination Plants | Structural bars, brine system components | CuNi 70/30 | Superior resistance to high-salinity water and erosion-corrosion |
| Naval & Defense | Weapon system components, propulsion parts, fasteners | CuNi 70/30, 66-30-2-2 | High mechanical strength, fatigue resistance, compliance with naval standards |
| Chemical & Process Industry | Agitator shafts, valve stems, machined components | CuNi 90/10, CuNi 95/5 | Resistance to chemical attack and uniform corrosion |
| Automotive & Heavy Engineering | Precision machined rods, bushings, connectors | CuNi 95/5 | Good machinability combined with corrosion resistance |
| Aerospace & Instrumentation | Precision rods, sensor housings, connectors | CuNi 95/5 | Dimensional stability, non-magnetic behavior, corrosion resistance |
| Architectural & Decorative | Exposed rods, marine-grade fittings | CuNi 90/10 | Attractive patina formation and durability in coastal environments |
|
EPC / Consultant Guidance: • Select CuNi 90/10 for moderate seawater velocity systems and general marine use. • Use CuNi 70/30 or 66-30-2-2 for high-velocity, high-stress, or critical naval applications. • Always specify alloy grade, standard (ASTM / EN), temper, and surface condition in BOQs and drawings. |
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Standard Copper Nickel Bars & Rods Dimensional Chart
Note: Theoretical weights below are indicative and calculated using density ρ = 8.90 g/cm³ (typical for Cu-Ni alloys). Actual weight varies by grade (90/10, 70/30, etc.), temper, and manufacturing tolerances. Use this chart for estimation; confirm on MTC / inspection for EPC / consultant submissions.
| Copper Nickel Round Bars (Solid) – Standard Sizes & Theoretical Weight | |||
|---|---|---|---|
| Diameter (mm) | Cross-Section Area (mm²) | Theoretical Weight (kg/m) | Typical Supply Form |
| 6 | 28.27 | 0.252 | Straight / Cut Length |
| 8 | 50.27 | 0.447 | Straight / Cut Length |
| 10 | 78.54 | 0.699 | Straight / Cut Length |
| 12 | 113.10 | 1.007 | Straight / Cut Length |
| 16 | 201.06 | 1.789 | Straight / Cut Length |
| 20 | 314.16 | 2.796 | Straight / Cut Length |
| 25 | 490.87 | 4.368 | Straight / Cut Length |
| 30 | 706.86 | 6.290 | Straight / Cut Length |
| 40 | 1256.64 | 11.182 | Straight / Cut Length |
| 50 | 1963.50 | 17.476 | Straight / Cut Length |
| Copper Nickel Hex Bars (Across Flats) – Standard Sizes & Theoretical Weight | |||
|---|---|---|---|
| Across Flats (AF) (mm) | Cross-Section Area (mm²) | Theoretical Weight (kg/m) | Typical Supply Form |
| 10 | 86.60 | 0.771 | Hex Bar / Cut Length |
| 12 | 124.71 | 1.110 | Hex Bar / Cut Length |
| 14 | 169.74 | 1.511 | Hex Bar / Cut Length |
| 17 | 250.29 | 2.227 | Hex Bar / Cut Length |
| 19 | 312.67 | 2.782 | Hex Bar / Cut Length |
| 22 | 419.31 | 3.732 | Hex Bar / Cut Length |
| 24 | 498.83 | 4.440 | Hex Bar / Cut Length |
| 27 | 631.35 | 5.618 | Hex Bar / Cut Length |
| 30 | 779.42 | 6.937 | Hex Bar / Cut Length |
| 32 | 886.81 | 7.891 | Hex Bar / Cut Length |
| Copper Nickel Flats – Standard Sizes & Theoretical Weight | ||||
|---|---|---|---|---|
| Width (mm) | Thickness (mm) | Area (mm²) | Theoretical Weight (kg/m) | Typical Supply Form |
| 12 | 3 | 36 | 0.320 | Flat / Cut Length |
| 20 | 3 | 60 | 0.534 | Flat / Cut Length |
| 25 | 3 | 75 | 0.668 | Flat / Cut Length |
| 25 | 5 | 125 | 1.113 | Flat / Cut Length |
| 30 | 5 | 150 | 1.335 | Flat / Cut Length |
| 40 | 5 | 200 | 1.780 | Flat / Cut Length |
| 50 | 6 | 300 | 2.670 | Flat / Cut Length |
| 50 | 10 | 500 | 4.450 | Flat / Cut Length |
| 75 | 10 | 750 | 6.675 | Flat / Cut Length |
| 100 | 10 | 1000 | 8.900 | Flat / Cut Length |
| Weight-per-Meter Calculation (Consultant-Friendly) | |
|---|---|
| Round Bar (Solid) | kg/m = (π/4 × d²) × ρ × 10-6 | d in mm, ρ in kg/m³ |
| Hex Bar (Across Flats) | kg/m = (0.8660 × AF²) × ρ × 10-6 | AF in mm |
| Flat Bar | kg/m = (W × T) × ρ × 10-6 | W,T in mm |
