Introduction Chemical Composition Physical Properties Mechanical Properties Other Designations Fabrication and Heat Treatment Annealing Cold Working Hot Working Welding Forging Machinability Applications
Copper nickel alloys are comprised of 2% to 30% nickel and have high oxidation resistance and stress corrosion cracking resistance. Their high oxidation resistance is seen in moist air and steam. Their high oxidation resistance is seen in moist air and steam. These alloys are thermally stable and possess moderate strength even under elevated temperature conditions. The corrosion resistance and strength of these alloys are improved by the addition of manganese, iron, niobium, and or chromium. Copper nickel alloys also have good fabricability and high inherent resistance to biofouling. Pure Nickel
The corrosion resistance and strength of these alloys are improved by the addition of manganese, iron, niobium, and or chromium.
Cupronickel indian coin. Image Credit: Jan Zwolinski/Shutterstock.com
The soluble nature of nickel in copper provides the copper nickel alloys with single-phase alpha structures. The alpha dendrites in the cast structures contain a large amount of nickel starting from the center up to the edge of the dendrite. A large quantity of nickel is also present in interdendritic regions. The dendrite structure is broken by mechanical treatments. The alloying elements do not get homogenized even by repeated thermal and mechanical treatments.
Copper nickel alloys are of two types which include 70/30 and 90/10. The 70/30 copper nickel alloys have great resistance to sea water-related corrosion due to the presence of significant amounts of manganese and iron.
Copper nickel alloys are used in the following areas:
There are several beneficial properties of copper nickel alloys that help them meet the tough rigors of applications they are used for. Copper nickel 70/30 alloy is a dense metal with a high melting point.
The chemical composition of UNS C71500 copper nickel alloys is outlined in the following table.
The following table shows the physical properties of UNS C71500 copper nickel alloys.
The mechanical properties of UNS C71500 copper nickel alloys are displayed in the following table.
Equivalent materials to UNS C71500 copper nickel alloys are:
UNS C71500 copper nickel alloys are annealed at temperatures between 649 and 816°C (1200 and 1500°F.) UNS C71500 copper nickel alloys have good cold working capacity and can be hot formed efficiently.
Copper nickel 70/30 alloys can be welded using spot welding, coated metal arc welding, butt welding, gas shielded arc welding, brazing, seam welding, soldering, and oxyacetylene welding processes. Temperatures between 927 and 1038°C (1700 and 1900°F) are suitable for the 70/30 copper nickel alloys. The machinability rating of copper nickel 70/30 alloys is 20%.
UNS C71500 copper nickel alloys are annealed at temperatures between 649 and 816°C (1200 and 1500°F)
UNS C71500 copper nickel alloys have good cold working capacity.
Copper nickel 70/30 alloys are hot formed in an excellent manner.
Copper nickel 70/30 alloys can be welded using gas shielded arc welding, spot welding, coated metal arc welding, butt welding, seam welding, brazing, soldering and oxyacetylene welding processes.
Temperatures between 927 and 1038°C (1700 and 1900°F) are suitable for the 70/30 copper nickel alloys.
The machinability rating of copper nickel 70/30 alloys is 20%.
UNS C75100 copper nickel alloys are used for applications that ordinary stainless steel is insufficient for, in environments where corrosion is a commonplace issue that affects the durability of parts and overall cost-effectiveness. The properties of copper nickel alloys make them highly beneficial for these industrial applications.
The main application for these alloys is in the underwater industry, where corrosion is a persistent problem that impacts the performance of metals used in parts. They are used in applications such as offshore piping, seawater cooling, and firewater systems.
Copper-nickel 70/30 alloys are commonly employed in desalination plants, both for multi-stage flash and multiple effect distillation plants. Alloy choice depends on both the corrosion conditions in the plant’s various parts and cost considerations. These alloys are used in heat recovery and brine heater components in multi-stage flash plants and for evaporator tubes and final heat recovery exchangers in multiple effect distillation plants.
Because of their resistance to seawater, these alloys are also used in the maritime industry as materials for components such as cooling systems, heat exchangers, and piping. In fact, naval seawater piping and condensers were the original applications of copper-nickel 70/30 alloys. A recent, novel, but limited use of these industrial materials in the maritime industry is in boat hull plates and sheathing.
These alloys are also increasingly being applied in the power generation sector. In fossil fuel and nuclear power plants, materials that can perform sufficiently in heat transfer processes are in high demand. Components that require suitable materials include coolers, condensers, heat exchangers, valves, and pipework.
Copper-nickel alloys can be used successfully in a range of water types including seawater, freshwater, brackish water, cooling tower water, and water with high proportions of dissolved solids.
Other uses for these alloys are as caging for aquaculture applications and as antimicrobial surfaces. The wide range of industrial applications makes copper-nickel 70/30 alloys key materials in multiple sectors.
More from AZoM: Properties and Classifications of Copper-Nickel Alloys (Cupronickel)
Nickel Institute (2022) Applications of copper-nickel alloys [online] nickelinstitute.org. Available at:
https://nickelinstitute.org/en/about-nickel-and-its-applications/copper-nickel-alloys/applications-of-copper-nickel-alloys/
Disclaimer: The views expressed here are those of the author expressed in their private capacity and do not necessarily represent the views of AZoM.com Limited T/A AZoNetwork the owner and operator of this website. This disclaimer forms part of the Terms and conditions of use of this website.
Reg Davey is a freelance copywriter and editor based in Nottingham in the United Kingdom. Writing for AZoNetwork represents the coming together of various interests and fields he has been interested and involved in over the years, including Microbiology, Biomedical Sciences, and Environmental Science.
Please use one of the following formats to cite this article in your essay, paper or report:
Davey, Reginald. (2022, September 08). Copper Nickel Alloy 70/30 – UNS C71500 – Cupronickel. AZoM. Retrieved on January 16, 2024 from https://www.azom.com/article.aspx?ArticleID=6298.
Davey, Reginald."Copper Nickel Alloy 70/30 – UNS C71500 – Cupronickel".AZoM.16 January 2024.
Davey, Reginald. "Copper Nickel Alloy 70/30 – UNS C71500 – Cupronickel". AZoM. https://www.azom.com/article.aspx?ArticleID=6298. (accessed January 16, 2024).
Davey, Reginald. 2022. Copper Nickel Alloy 70/30 – UNS C71500 – Cupronickel. AZoM, viewed 16 January 2024, https://www.azom.com/article.aspx?ArticleID=6298.
Do you have a review, update or anything you would like to add to this article?
Andrea Steck, Martius Cobo, Bruno Chencarek
In this interview, join Bruker as they describe how to improve battery production and performance, through the entire value chain, with the help of NMR.
In this interview, Sara Speak, the Industrial and Environmental Product Application Specialist at Veolia Water Technologies & Solutions, talks to AZoMaterials about the current challenges the food and beverage industry (F7b) faces in water management.
Dr. Craig Johnson & Dr. Kate Vanderburgh
AZoMaterials speaks with Dr. Craig Johnson, Director of Research Core Facilities, and Dr. Kate Vanderburgh, Scanning Electron Microscope (SEM) and X-Ray Microscopy Manager, about the Materials Characterization Core (MCC) facility at Drexel University.
This product profile describes the features and applications of the PlasmaPro ASP by Oxford Instruments Plasma Technology.
This article describes the features and applications of the Optical precision micrometer - optoCONTROL2520.
Discover the SAVANNAH Raman module, the most compact OEM Raman module.
The global semiconductor market has entered an exciting period. Demand for chip technology is both driving the industry as well as hindering it, with current chip shortages predicted to last for some time. Current trends will likely shape the future of the industry, which is set to continue to show
The primary distinction between graphene-based batteries and solid-state batteries lies in the composition of either electrode. Although the cathode is commonly changed, carbon allotropes can also be employed in fabricating anodes.
In recent years, the IoT is rapidly being introduced into almost all sectors, but it has particular importance in the EV industry.
AZoM.com - An AZoNetwork Site
UNS N06022 Plate Owned and operated by AZoNetwork, © 2000-2024