UNS C71500 Copper Nickel Chemical Composition Properties, Grades, Chart and PDF Online

ASTM B111 C71500 is a standardized specification for seamless copper-nickel tubes that are used in heat exchangers and condensers in marine as well as in other corrosive environments. This material known 70/30 Copper-Nickel consists of approximately 70% copper and 30% nickel in addition with small amount of iron and manganese. The alloy C71500 is very sort after seawater corrosion, fouling organism or sometimes erosion resistance which is application in sea or offshore are most suitable. As for a tube being covered by the ASTM B111 specification, its chemical composition, mechanical properties, dimensions, tolerances and way of testing are all included in the specification. Implementing this level of quality is extremely important to engineers and manufacturers so as to verify that C71500 bacteria strains will maintain their functional features in industrial sectors. In the standards documentation, B111 ASTM, such details are given as chemical composition, grades, charts, and a sort of PDF documentation.

C71500 Coppers Chemical Composition And Grade Table

C71500 copper, also known as 70/30 copper-nickel, features a chemical formula comprising about 70% copper, 30% nickel, with little iron and manganese. This alloy table elucidates about all the grades and the component chemicals severally. It performs as an important indicator for the engineers and manufacturers when selecting the right grade for a specific task. The knowledge about structure of C71500 helps in establishing whether the alloy is a good option for use in many demanding industrial settings such as, rendering of services to an environment.

C71500 Copper Composition Table
Elements Cu Pb Zn Fe Ni Mn
Min (%) - - - 0.40 29.0 -
Max (%) Rem 0.05 1.0 1.0 33.0 1.0

The Advantages and Disadvantages of ASTM B111 C71500 Copper Material Properties, C71500 Properties


  • Exceptional Electrical Conductivity: OFE Copper C71500 exhibit the highest electrical conductivity, absolutely essential for the electrical conductivity, which is the main value of the applications that need efficient electrical transmission.

  • Soft Material: This property is important in that it allows for easy forming, bending, and other manufacturing processes at which no physical weakness in the material is introduced.

  • Impressive Thermal Conductivity: C71500 is a renowned thermal conductivity material that qualifies it to be used in multiple functions which include heat transfer, radiators and heat exchangers.

  • Reasonable Corrosion Resistance: Though not as corrosive-proofing as some other copper alloys, C71500 still presents a reasoned resistance against environmental degradation.

  • Susceptibility to Oxidation: The OFHC C71500 copper is a higher purity material, which allows it to be more susceptible to oxidation when kept in air or moisture, so the frequent precautions needs to be taken during its storage.


  • High Cost: Pure copper is contrary to other copper alloys such as C71500 so it is more expensive as a result of the purity and a complicated manufacture method.

  • Limited Strength: C71500 material has a relatively soft characteristic; hence, it could bring about issues in applications involving high levels of strengthening.

  • Not Ideal for High-Stress Environments: Its strength is reduced, and it more easily oxidizes than carbon steel do not make it the first choice for heavy-duty construction components.

  • Limited Work Hardening Ability: Copper alloy C71500 is incapable of work hardening hard as it tends to stay the same post plastic and deformation process.

  • Susceptibility to Stress Corrosion Cracking: Although a copper C71500 successfully resists general corrosion, it can still crack due SCC under certain circumstances.

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Frequently Asked Questions

What does ASTM B111 C71500 Copper refer to?

The ASTM B111 C71500 indicates a defined standard specification for seamless copper-nickel tubes, that are typically employed in heat exchangers and condensers, especially in marine and corrosive environments. This is the most popular form of alloy, being the grade known as 70/30 Copper-Nickel.

Which are the Main Chemical Elements of C71500 Copper?

Copper (Cu), Lead (Pb), Zinc (Zn), Iron (Fe), Nickel (Ni) and Manganese (Mn)

Why do you need to choose C71500 Copper?

C71500 is predominant for good seawater corrosion, biofouling, erosion, and other aggressive environment resistant feature. It has very good application in marine processe like heat exchangers and condensers due to its durable feature and long term performance in those extreme environments.

What process for C71500 copper production?

C71500 copper is usually made from procedures like, melting, casting, and extrusion or rolling. Achieving this is a matter of melting the alloy of copper and nickel, shaping it by casting it in ingots, billets or extruding it, and either rolling or drawing it to obtain the desired shapes and sizes.

Is the C71500 alloy suitable for use in harsh conditions?

Indeed, C71500 which is copper-nickel alloy is fit for reliable functioning in rough conditions. The marine and offshore applications are the idea choice for use of this material due to its outstanding erosion and corrosion resistance to seawater.

Is the C71500 alloy easily available in Mumbai, India?

As such, the C71500 alloy in the Mumbai, India market can be performed by a lot of scrap metal sellers and which provide many materials.