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Copper Nickel 70/30 is a copper-nickel alloy developed for the most demanding marine and offshore environments. Containing approximately 70% copper and 30% nickel, together with controlled additions of iron and manganese, the alloy provides excellent resistance to corrosion and erosion. At PipingMarket.eu, Copper Nickel 70/30 products can be sourced through one RFQ platform.
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Why choose Copper Nickel 70/30?
The higher nickel content gives Copper Nickel 70/30 improved mechanical strength and enhanced corrosion resistance compared with lower-alloy copper-nickel grades. It performs exceptionally well in fast-flowing seawater, making it suitable for installations where high flow velocities, elevated temperatures or aggressive marine conditions are expected. In addition to its corrosion resistance, the alloy offers good weldability, excellent fabrication properties and a long operational service life.
Product forms
Copper Nickel 70/30 is available in numerous piping products, including:
- seamless pipes;
- fittings;
- flanges;
- forgings;
- cunifer elbows.
Copper Nickel 70/30 versus CuNi 90/10
Although both copper-nickel alloys are designed for marine environments, they are selected for different operating conditions. Copper Nickel 70/30 generally offers higher strength and improved resistance to erosion in severe seawater service, while CuNi 90/10 is widely used for general marine piping applications where operating conditions are less demanding. Selecting the appropriate alloy depends on factors such as seawater velocity, operating pressure and temperature.
Typical applications
The outstanding seawater performance of Copper Nickel 70/30 makes the alloy suitable for a broad range of critical applications, including:
- offshore platforms;
- naval vessels;
- desalination plants;
- condensers;
- heat exchangers;
- seawater cooling systems;
- firewater systems;
- marine piping networks.
Source the right alloy for your application
Selecting the appropriate Copper Nickel 70/30 alloy starts with understanding your project requirements. Share your specifications through our online RFQ platform, and our specialists will help you source the most suitable products based on your material grade, dimensions and application. We provide sourcing support through an international supplier network.
