UNS C77000 Copper Nickel Chemical Composition Properties, Grade, Tables and Document

The extreme conditions are the environment of submarine that contain two variable components of temperature and density, in which UNS C77000, a copper-nickel alloy, is known as having most remarkable corrosive resistance and thermal stability. Manufactured mainly of copper (Cu) and nickel (Ni) containing of 22% nickel is common. This alloy with corrosion resistance to seawater is another great example of such material that is widely used in marine field like building ships as well as offshore structures. Other important characteristics are heat conductivity and electrical conductivity that make it utilizable for either heat exchanging or electrical system. As the chemical composition of UNS C77000 is some other elements like the Fe and Mn in the very small quantities to improve the mechanical properties. In material standards documents, we are capable of defining detailed properties and chemical composition tables, which may be useful for engineers and manufacturers when they are selecting the right materials for their specific applications.

UNS C77000 Copper Chemical Composition And Grade Table

UNS C77000 is a copper alloy with high performance, with major ingredients being copper (Cu) moreover nickel (Ni) and zinc (Zn). Its component of substances usually makes up about 58-63% of copper, 18-22% of nickel, and 18-22% of zinc. This alloy includes excellent corrosion resistant capabilities, especially in seawater, and it also displays satisfactory mechanical properties, which can be advantageous for several applications within the industry, like valves, pump components, and marine devices. C77000 has this reputation of being durable, easy to machine, and having great heat conductions, which gives it a niche market for the heavy duty industrial and marine applications.

UNS C77000 Copper Composition Table
Elements Cu Pb Zn Fe Ni Mn
Min (%) 53.5 - - - 16.5 -
Max (%) 56.5 0.05 Rem 0.25 19.5 0.50

The Advantages and Disadvantages of UNS C77000 Copper Material Properties, C77000 Properties


  • Excellent Electrical Conductivity: UNS C77000 copper gives high electric conductivity, thus being suitable for electric wiring and general components in many industries.

  • Good Thermal Conductivity: Copper, which has higher thermal conductivity, can be used in heat exchangers and cooling systems since it has the ability to transfer heat more efficiently.

  • Corrosion Resistance: Thanks to the high resistance to corrosion of C77000 copper, the material can withstand most environments, especially marine ones.

  • Malleability and Ductility: Copper is very ductile and malleable that it can be easily worked to produce patterns and complicated designs.

  • Antimicrobial Properties: Copper has a natural antimicrobial property that impedes the bacterial and fungal growth on its surface, which is why it is attractive for medical purposes.


  • Cost: Copper, including UNS C77000, is generally expensive than alternatives like aluminum or steel which can have a significant cost impact to the final project.

  • Susceptibility to Oxidation: The copper surface can oxidize over time and show a patina, possibly affecting the look of the object in some applications.

  • Softness: Copper's ability to be molded is one of its major strengths yet another downside contesting in some of the applications that require higher hardness.

  • Weight: As copper is much denser than many other substances, the end products are heavier and quite unsuitable for weight-sensitive applications.

  • Compatibility Concerns: Copper is not compatible with a few substances, and these substances would undergo galvanic corrosion when exposed to certain conditions.

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Frequently Asked Questions

The chemical makeup of UNS C77000 Copper Nickel is what?

UNS C77000 Copper Nickel usually includes 66% copper, 30% nickel, and 2% iron with trace amounts of other elements like manganese and zinc.

What are the mechanical properties of UNS C77000 Copper-Nickel, respectively?

The mechanical properties of UNS C77000 Copper Nickel are the high tensile strength, good ductility, and excellent resistance to corrosion, erosion, and biofouling.

How UNS C77000 Copper Nickel resists corrosion?

UNS C77000 Copper Nickel possesses extraordinary corrosion resistance, especially in seawater and marine conditions, as its surface oxide layer provides such protection.

Where is UNS C77000 Copper Nickel generally used?

Copper Nickel C77000 UNS is widely used in marine engineering, ship building, offshore constructions, heat exchangers and condensers because its resistance to corrosion and durability.