Strong and Durable : Cuni fittings to brave any corrosive environment

Industrialists and material engineers have the constant challenge of designing fittings and systems for abrasive and corrosive environments. Industries such as marine engineering, oil and gas, and chemical manufacturing spend a lot of money to ensure their systems work well for a long time in such environments. One of the most popular alloys for such applications is the Copper-Nickel alloy or CuNi as it is generally known in the industry. CuNi fittings are employed extensively in piping distribution systems, power generation activities, offshore platform and processing, construction of hulls of boats and ships, and seawater systems. 

Cuni Fittings and Corrosion

CuNi is a copper(base metal) alloy with a smaller percentage of nickel and other metals such as zinc and manganese for strength and other desired properties. The combination of copper and nickel makes the alloy remarkably resistant to corrosion, especially in seawater. CuNi fittings are found to be resistant to the effect of seawater, alkaline solutions, and moisture as well. In addition to corrosion resistance, the alloy is also found to be resistant towards the action of microorganisms found in marine environments. 

CuNi fittings are also employed in desalination plants, offshore platforms, and power generation factories. These industries use seawater in their processes in a high-temperature environment. Other steel alloys are found to undergo galvanic corrosion, chloride crevice corrosion, and stress corrosion cracking in such applications. CuNi fittings however are found to be an ideal fit for these circumstances. 

Cuni Fittings Physical Properties 

Another reason why manufacturers prefer CuNi fittings is due to their many favorable physical properties. Copper and nickel alloy with each other easily and the resultant alloy is seen to have a combination of properties from both metals. CuNi fittings have great ductility, weldability, and can be easily formed in sheets and pipes of various thickness. This makes it easy to use in different types of projects across industries. In addition to pipe fittings, CuNi is also used to protect other marine and offshore structures such as boats, ships, and platforms from getting affected by the seawater.


CuNi fittings have been popular in the marine and seawater based industries for a long time and have proved to be a valuable ally in corrosive working conditions. Cuni fittings suppliers in UAE such as the New World Horizons follow ASTM, EN and ISO standards to give you the best product possible. You can find different types of CuNi fittings with them as buttweld fittings, elbow, reducer, tee, and cap for your different requirements.

Cuni Fittings For Effective Pipe Support

As the name suggests, cuni fittings or Copper-Nickel fittings are made using an alloy of Copper and Nickel. These fittings are known for their use in underwater and marine applications. This is because they have strong general resistance to corrosion that usually occurs due to seawater. Due to the high concentration of Copper and Nickel, cuni fittings are extensively used in the power plants and the shipbuilding industry for connecting pipes.

Copper is very well known for its high electrical conductivity, high ductility, high heat conduction, good machinability, and corrosion resistance. This makes it one of the most widely used materials in the industrial space.

Nickel, on the other hand, possesses better corrosion resistance, greater toughness, and strength at both high and low temperatures. Though it is not normally used as a stand alone material in the industries, it can be combined effectively with another material to form an alloy.

Benefits of cuni fittings

Some of the common benefits offered by these Copper Nickel fittings are:

  • High resistance to corrosion in seawater.
  • High resistance to SCC ( Stress Corrosion Cracking ) underwater.
  • High resistance to pittance and corrosion due to chlorides
  • High resistance to pitting
  • Easy to weld and fabricate

Besides these, Copper-Nickel fittings are extensively used in areas requiring high tensile strength. This ensures that the pipes can endure the high temperatures which might otherwise create residual stresses and strains. Thus enabling them to work under high pressures without showing any signs of fatigue.

Types Of Copper Nickel Fittings

Copper Nickel fittings can be used in various forms, some of which are:

  • 90-degree elbows
  • 45-degree elbows
  • Forged tees
  • Forged cross
  • Forged plug
  • Bushings
  • Couplings
  • Unions
  • Inserts
  • Street Elbows
  • Pipe Nipples

Generally, all the Copper-Nickel fittings can be forged as per the demand of the customer and can be made to suit the requirements. These can also be ordered in various size ranges so that you can utilize the fittings at various parts of the plants. They are designed to withstand different levels of pressure such as 2000 lbs, 3000 lbs, 6000 lbs, 9000 lbs, etc.

Since these fittings are ultimately to be used in pipelines, it is important to know the type and size of the pipes in which they are to be used. Hence, the type of pipes plays an important role in the final decision of buying the fittings.

Getting Copper Nickel Fittings

In case you have a plant-based in UAE and want to obtain high-quality cuni fittings, it should not be a difficult task. There are numerous trustworthy suppliers such as New World Horizon General Trading L.L.C, Vishal Steel, RMT Dubai, etc. who can provide high-quality Copper Nickel fittings.

Cuni fittings generally have excellent quality finishing and duress for long life, high pressure and zero defects. New World Horizon with its wide range of fittings and very competitive prices, is very well known for cuni fittings in Dubai. Here you can select from a wide range and get the right type of fittings to use in your power plants.