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Properties and Characteristics of Copper Nickel 90/10 Flanges

When choosing the ideal metal for a specific job, selecting the right grade of Copper Nickel alloy can be a smart choice for many applications. Copper Nickel 90/10 is a popular alloy well-known for its excellent resistance to corrosion, high flexibility, and thermal stability. This blog post explores the remarkable properties and characteristics of Copper Nickel 90/10 flanges.

What are Copper Nickel 90/10 Flanges?

Copper Nickel 90/10 Flanges are a type of flange, or piping fitting, used to connect sections of tubing and piping. They provide a reliable seal and connection for plumbing systems in ships, chemical processing plants, industrial condensers and more. Copper Nickel 90/10 Flanges indicates that the alloy comprises 90% copper and 10% nickel content by weight. This combination provides superior resistance to corrosion from seawater, saline water solutions such as brines and chlorides, organic acids like acetic acid found in vinegar solutions, and gas atmospheres laden with hydrogen sulfide (H2S). This alloy has a higher temperature tolerance than other brass alloys, making it ideal for steam services.


Excellent Corrosion Resistance

Copper nickel 90/10 flanges are popular for many applications due to their excellent corrosion resistance. The main benefit of copper-nickel alloys is that they offer great durability, strength, and good corrosion resistance, making them ideal for use in extreme environmental conditions. Specifically, adding 10% nickel to the alloy makes this alloy resistant to chloride stress-corrosion cracking and pitting. This also helps increase its ability to resist oxidation and other corrosive materials in various environments. Furthermore, these flanges have extremely high thermal conductivity and electrical resistivity, enhancing their suitability for marine applications such as heat exchangers and condensers. They also possess superior weldability properties, allowing easy fabrication even in difficult environments or projects requiring complex welding techniques. In short, copper-nickel 90/10 flanges have outstanding corrosion resistance making them an ideal choice when dealing with highly corrosive environments or extreme weather conditions.

High Ductility

Copper nickel 90/10 flanges comprise a 90% copper and 10% nickel alloy with excellent strength and flexibility. This allows the flanges to be used in areas subject to high pressure, vibration, and temperature changes without fear of leakage or corrosion. The increased hardness and strength of this alloy come through its elevated levels of both copper and nickel content providing superior protection from stress-corrosion cracking, erosion corrosion, pitting resistance acid solutions (PRAs), crevice corrosion attacks, chloride stress-corrosion cracking (SSC) as well as superb general corrosion resistance through a wide range of ambient temperatures. The combination also provides the benefit of enhanced toughness, making it suitable for cryogenic applications while still being able to resist oxidation up to 815° Celsius making it an ideal choice for hot environments.

Thermal Stability

Copper Nickel 90/10 alloys can operate effectively under high temperatures, making them suitable for high-heat applications. They can also maintain their strength when exposed to high temperatures for prolonged periods, making them ideal for applications like engine exhaust manifolds, which involve high-temperature exposure.

Low Magnetic Permeability

Copper Nickel 90/10 alloys have low magnetic permeability, making them suitable for sensitive electronic equipment use. When you need to use a metal that does not interfere with electronic equipment, Copper Nickel 90/10 flanges are a great option.

Antimicrobial Properties

With its natural antimicrobial properties, Copper Nickel 90/10 is an excellent material for hospitals, food processing plants, and other facilities requiring high hygiene standards. Copper Nickel 90/10 helps prevent the growth of bacteria and other potentially harmful microorganisms which are hazardous to people’s health.


In conclusion, Copper Nickel 90/10 flanges are a fantastic choice for many applications. They are highly corrosion-resistant, have excellent flexibility and thermal stability, low magnetic permeability, and have natural antimicrobial properties, making them the preferred option for sensitive areas like healthcare facilities. Copper Nickel 90/10 is a versatile and dependable metal alloy supporting many industries. So, whether in the marine, automotive, or healthcare industry, Copper Nickel 90/10 flanges have got you covered. With the numerous properties and characteristics we have highlighted, if you’re looking for a metal alloy that will provide reliable performance over the years, you should consider Copper Nickel 90/10 flanges.