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Monel 400 Flanges – Composition, Properties and Uses

Monel 400 Flanges

Monel 400 Flanges are among the industry’s most durable and resistant flanges. They are often used in highly corrosive environments because of their excellent corrosion resistance properties. This article discusses Alloy 400 Slip On Flange in detail, including their composition, physical and mechanical properties, heat treatment, uses, and corrosion resistance.

What is Monel 400 Flanges?

NR 2.4360 Reducing Flange are a type of flange manufactured from an alloy of copper, nickel, and iron. These flanges are known for their excellent corrosion resistance in both saltwater and hydrofluoric acid environments, making them highly sought after for use in the marine industry. The high strength-to-weight ratio also makes them optimal for components requiring strength and lightness.

Monel 400 Flanges Composition

DIN 2.4360 Spectacle Flange comprise nickel-copper alloy containing about 63% nickel and 33% copper. The remaining 2% comprises iron, manganese, silicon, and carbon. The alloy has a high corrosion resistance and exhibits excellent mechanical properties. The nickel content contributes to the toughness and durability of the flanges, while the copper content enhances the resistance to corrosion.

Grade C Mn Si Cu S Ti Ni Al Fe
Monel 400 0.3 max 2.0 max 0.5 max 28.0 – 34.0 0.02 max 63.0 min 0.50 max 1.0 – 2.5

Monel 400 Flanges Physical Properties

Class 150 Monel 400 Rtj Flange  are known for their excellent physical properties. These flanges are highly strong and resistant to most acids and alkaline solutions. They also have low thermal expansion, making them perfect for high-temperature applications. The flanges are non-magnetic, making them ideal for electronic devices where magnetic interference must be minimized.

Monel 400 Flanges Mechanical Properties

Nickel Alloy 400 Forged Flanges have outstanding mechanical properties, including high tensile strength, excellent ductility, and resistance to fatigue and stress corrosion cracking. The flanges can withstand high temperatures, making them perfect for use in furnace and boiler applications.

Temp° F Tensile (psi) .2% Yield (psi) Elongation in 2” %
70 110,600 54,900 44
1000 89,000 35,600 49
1200 83,000 35,400 54
1400 67,000 34,400 53
1600 45,000 28,200 58

Monel 400 Flanges Heat Treatment

Uns N04400 Flanges have a high heat resistance, making them perfect for use in high-temperature applications. They can withstand temperatures of up to 1000°F without losing their mechanical properties.

Monel 400 Flanges Corrosion Resistance

One of the most significant advantages of  Astm B564 Uns N04400 Pipe Flange is their excellent corrosion resistance. The flanges resist corrosion from various substances, including alkalis, acids, and seawater. They are also resistant to crevice corrosion and pitting. This makes them ideal for use in highly corrosive environments, such as chemical processing plants and offshore oil rigs.

Monel 400 Flanges Uses

Alloy 400 Flanges are widely used in various industries such as chemical processing, aerospace, marine, and oil and gas. Monel 400 Flanges are used in chemical processing plants for their excellent corrosion resistance. The flanges are commonly used to transport crude oil, natural gas, and other corrosive substances in offshore oil rigs. The flanges’ durability and strength make them perfect for aerospace applications, particularly in structural components and engine parts.


In conclusion, NR 2.4360 Flange are an excellent choice for use in highly corrosive environments. The flanges are made up of nickel-copper alloy, which exhibits excellent mechanical and physical properties. They have a high resistance to heat and corrosion, making them ideal for use in various industries. Monel 400 Flanges are also commonly used in offshore oil rigs, chemical processing plants, and aerospace industries because of their durability and strength. This makes Monel 400 Flanges a perfect choice for high-performance applications.

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