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Copper Nickel Washers Suppliers & Exporters
If your marine seawater piping, desalination plants, or naval hull hardware require superior resistance to marine bio-fouling and saltwater corrosion, you've reached the right source. As a premier Copper Nickel Washers Supplier and Exporter, Aurum Overseas manufactures precision fasteners to ASME B18.21.1, DIN 125, and ISO 7089 standards.
Our Copper Nickel 90/10 Washers and Copper Nickel 70/30 Washers feature a copper-nickel single-phase alpha structure alloyed with iron and manganese for optimal impinging velocity and erosion resistance in marine fluid environments. Supplied with full EN 10204 3.1 MTR certifications, our complete stock of UNS C70600/C71500 Washers is ready for immediate global dispatch.
We export these washers across North America (USA, Canada, Mexico), Europe (Germany, UK, France, Italy, Netherlands, Norway), the Middle East (UAE, Saudi Arabia, Qatar, Kuwait, Oman), and Asia-Pacific (Singapore, Malaysia, Australia).
Technical Specifications
| Parameter | Technical Specification / Standard Range |
|---|---|
| Material Grades | Cupro Nickel 90/10 (C70600) / Cupro Nickel 70/30 (C71500) |
| Forging / Bar Specification | ASTM B151, ASTM B122 / ASME SB151, ASME SB122 |
| UNS Designations | UNS C70600 (90/10) / UNS C71500 (70/30) |
| Manufacturing Standards | ASTM B151, ASME SB151, ASTM B122, ASME SB122 |
| Dimensional Specifications | ASME B18.21.1, DIN 125 A/B, DIN 127, DIN 9021, ISO 7089, ISO 7090 |
| Washer Types | Plain Washers, Spring Washers, Lock Washers, Square Washers, Conical Washers |
| Size Capability | Imperial: #4 to 4" NB | Metric: M3 to M100 |
| Thickness Range | 0.5 mm to 12 mm |
| Thermal Condition | Annealed / Cold Worked |
| Hardness Range | 65 to 85 HRB / 110 to 160 HB max |
Technical Properties & Chemical Composition
Equivalent Grades of Cupro Nickel
| STANDARD | WERKSTOFF NR. | UNS | EN |
|---|---|---|---|
| Copper Nickel 90/10 | 2.0872 | C70600 | CuNi10Fe1Mn |
| Copper Nickel 70/30 | 2.0882 | C71500 | CuNi30Mn1Fe |
Chemical Composition of Cupro Nickel Washers
| Element | Cu-Ni 90/10 (UNS C70600) (%) | Cu-Ni 70/30 (UNS C71500) (%) |
|---|---|---|
| Copper (Cu) | Balance (86.50 min / 88.60 min) | Balance (65.00 min) |
| Nickel (Ni) + Cobalt | 9.00 – 11.00 | 29.00 – 33.00 |
| Iron (Fe) | 1.00 – 1.80 | 0.40 – 1.00 |
| Manganese (Mn) | 1.00 max | 1.00 max |
| Zinc (Zn) | 1.00 max | 1.00 max |
| Lead (Pb) | 0.05 max | 0.05 max |
| Phosphorus (P) | 0.02 max | - |
| Sulfur (S) | 0.02 max | - |
| Carbon (C) | 0.05 max | - |
Mechanical Properties of Cupro Nickel Washers
| Property | Cu-Ni 90/10 | Cu-Ni 70/30 |
|---|---|---|
| Ultimate Tensile Strength | 551 MPa (80,000 psi) | 345 MPa (50,000 psi) |
| Yield Strength (0.2% Offset) | 241 MPa (35,000 psi) | 138 MPa (20,000 psi) |
| Elongation (%) | 30% min | 30% min |
| Density | 8.90 g/cm³ (0.321 lb/in³) | 8.94 g/cm³ (0.323 lb/in³) |
| Melting Point | 1443°C (2430°F) | 1238°C (2260°F) |
Types of Copper Nickel Washers
Aurum Overseas supplies a comprehensive range of Copper Nickel washer configurations manufactured according to standard DIN, ASME, and ISO dimensional tolerances for multiple engineering assemblies.
Cupro Nickel Plain Washers
Cupro Nickel Spring Washers
Cupro Nickel Lock Washers
Cupro Nickel Square Washers
Cupro Nickel Conical Washers
Key Advantages
Natural Macro-Fouling Resistance
High copper matrix actively prevents attachment of barnacles, algae, and marine organisms without toxic antifouling coatings.
Impingement Attack Protection
Controlled iron and manganese additions form a protective, self-healing oxide film that resists erosion-corrosion under turbulent fluid flow.
Excellent Thermal Conductivity
Maintains steady thermal dissipation and electrical continuity across subsea electrical grounding joints.
Resistance to Stress Corrosion Cracking
Single-phase alpha copper-nickel solid solution provides immunity to stress-corrosion cracking in marine and brackish water installations.
Key Applications of Copper Nickel Washers
| Industry Sector | Application | Operating Environment |
|---|---|---|
| Naval Shipbuilding | Hull penetrations, cooling water flanges, sonar domes, and valve fasteners | High-velocity raw seawater, marine bio-fouling spray, and wave impacts |
| Desalination Plants | Evaporator stage flanges, brine heater joints, and intake pump bolting | Hot concentrated brine, deaerated seawater, and chemical additives |
| Offshore Oil & Gas | Firewater deluge systems, splash zone structural bolting, and heat exchangers | Marine atmospheric salt spray, tidal surges, and brackish currents |
| Power Generation | Steam surface condenser joints, turbine oil coolers, and feed piping | Deaerated cooling water, low-pressure steam, and high-flow river water |
Quality Testing & Inspection
As a leading Copper Nickel Washers Supplier, Aurum Overseas subjects all production batches to strict quality verification:
- Positive Material Identification (PMI): Spectrometric X-ray verification checks exact elemental ratios including Cu, Ni, Fe, and Mn content.
- Mechanical & Tensile Testing: Verification of yield strength, tensile limits, and elongation per ASTM B151 and ASTM B122.
- Microstructural Inspection: Grain structure analysis confirms a uniform single-phase alpha solid solution.
- Dimensional Conformance: Precise micrometer and optical comparator checks guarantee compliance with ASME, DIN, and ISO standards.
Global Export Markets
Aurum Overseas supplies fully certified Copper Nickel Washers to industrial projects across:
USA
Canada
Mexico
Germany
United
Kingdom
France
Italy
Netherlands
Norway
UAE
Saudi
Arabia
Qatar
Kuwait
Oman
Singapore
Malaysia
Australia
Frequently Asked Questions
Copper Nickel 90/10 (UNS C70600) contains 10% nickel and offers superior bio-fouling resistance, while 70/30 (UNS C71500) contains 30% nickel, providing enhanced resistance to high fluid velocities and impingement attack.
No. The copper-rich surface naturally creates an inherent anti-fouling barrier that eliminates marine organism buildup.
Yes. Cupro nickel alloys possess good antimicrobial properties and resist corrosion in high-purity water streams.
Iron and manganese enhance the alloy's resistance to turbulence and erosion-corrosion caused by high-velocity seawater.
All orders include full EN 10204 3.1 Mill Test Reports detailing chemical composition, mechanical test results, and PMI verification.
Contact Aurum Overseas
Aurum Overseas provides rapid delivery of certified Copper Nickel Washers for high-specification global infrastructure.
Contact our sales engineering team for technical assistance, material certifications, and rapid pricing.