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CuNi10Fe1Mn (UNS C70600): The Marine Alloy That Outperforms the Rest
Imagine this: You’re responsible for outfitting a large offshore platform. You need materials that will survive brutal saltwater conditions, resist corrosion, and maintain strength under stress. What do you choose?
A standard stainless steel? It might not last. Titanium? Too expensive.
The answer: CuNi10Fe1Mn – the marine industry’s best-kept secret.
🧪 What is CuNi10Fe1Mn (UNS C70600)?
CuNi10Fe1Mn, also known as Copper-Nickel 90/10, is a copper alloy with 10% nickel, 1.0-1.8% iron, and manganese. Its chemical structure enhances strength and corrosion resistance, especially in saltwater and heat exchanger environments.
✳️ Chemical Composition (% by weight):
| Element | Composition |
| Copper (Cu) | 88.6 – 90.6% |
| Nickel (Ni) | 9.0 – 11.0% |
| Iron (Fe) | 1.0 – 1.8% |
| Manganese (Mn) | 1.0% max |
| Others | 0.5% max |
⚙️ Key Properties of CuNi10Fe1Mn
- Exceptional Seawater Corrosion Resistance
- High Thermal Conductivity
- Biofouling Resistance – reduces maintenance in marine environments
- Non-Sparking, Non-Magnetic
- Excellent Welding ability and Fabric ability
- Thermal Stability up to 300°C
- Resists Hydrogen Embrittlement
📘 Applicable Standards for CuNi10Fe1Mn (UNS C70600)
EN 1652
European standard for copper and copper alloy plates, sheets, and strips. Ensures consistent mechanical and chemical properties across manufacturing processes.ASTM B122
U.S. specification covering rolled copper-nickel alloys used in plate, sheet, strip, and rolled bar—commonly applied in condensers, heat exchangers, and marine hardware.UNS C70600
The Unified Numbering System (UNS) designation for CuNi10Fe1Mn, identifying it as a 90/10 copper-nickel alloy with added iron and manganese for enhanced seawater corrosion resistance.DIN 2.0872
German standard designation for this alloy, widely used across European industries for marine and industrial applications.
🛠️ Technical Specifications
| Property | Value |
| Tensile Strength | 275 – 380 MPa |
| Yield Strength | 105 – 150 MPa |
| Elongation | 30 – 40% |
| Hardness | 70 – 100 HB |
| Density | 8.94 g/cm³ |
| Melting Point | 1170 – 1240°C |
| Electrical Conductivity | ~5–7% IACS |
| Thermal Conductivity | 26–34 W/m·K |
🧩 Available Forms
CuNi10Fe1Mn is available in a wide range of customized and standard shapes, including:
Whether you need thin foils for precision engineering or thick plates for marine applications, this alloy delivers.
🌍 Applications of CuNi10Fe1Mn
This alloy is used extensively across:
🚢 Marine Industry:
- Seawater pipelines
- Condenser tubes
- Heat exchangers
- Desalination plants
- Ship hulls and seawater cooling systems
⚡ Power Generation:
- Condenser and exchanger tubing
- Steam turbine systems
🏭 Industrial Applications:
- Chemical processing equipment
- Offshore oil platforms
- Firewater systems
💡 Shift Your Perspective
Think copper alloys are just soft and outdated? Think again.
This isn’t your average metal. CuNi10Fe1Mn is engineered to thrive in aggressive environments—like seawater, chemical plants, and power stations. It resists corrosion, keeps its strength, and doesn’t get bogged down by biofouling like other materials.
It’s the quiet workhorse of the marine world. Now, it’s time to give it the spotlight.
📩 Got Questions?
🔹 Want custom dimensions?
🔹 Need a compliance certificate?
🔹 Curious about delivery timelines?
Contact us today – we’re happy to help you engineer smarter.
