ThePipingMart Blog Products Monel 400 Pipe – Composition, Properties and Uses

Monel 400 Pipe – Composition, Properties and Uses

Monel 400 Pipes

Monel 400 Welded Pipe are a type of nickel-copper alloy that is used in a variety of applications, including high-pressure and high-temperature environments. They are known for their excellent resistance to corrosion, which makes them ideal for use in power generation, chemical processing, marine engineering, and other industries. In this blog post, we will explore the composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance of the UNS N04400 Welded Pipe, providing you with everything you need to know about these versatile pipes.


What is Monel 400 Pipes?

Monel 400 Seamless Pipe are made of a nickel-copper alloy known for its strength and corrosion resistance. It has excellent fabricability, weldability, machinability, and good thermal conductivity. Its high ductility makes it suitable for many applications, such as tanks and chemical processing components.

Monel 400 Pipes Composition

UNS N04400 is composed of nickel, copper, and small amounts of iron, manganese, carbon, and silicon. Its composition is responsible for its high strength, toughness, and resistance to corrosion. The high nickel content gives it a low corrosion rate, and the copper content provides excellent resistance to reducing environments. The iron content ensures resistance to high-velocity seawater and the small amounts of other elements improve the alloy’s overall performance.

Grade C Mn Si S Cu Fe Ni Cr
Monel 400 0.30 max 2.00 max 0.50 max 0.24max 28.0-34.0 2.50 max 63.00 min

Monel 400 Pipes Physical Properties

UNS N04400 pipe exhibit excellent physical properties, including high strength, excellent corrosion resistance, and good thermal conductivity. They have a melting point of 1300-1390 °C and a density of 8.80 g/cm³. Additionally, they have good ductility and can be easily formed into various shapes and sizes.

Monel 400 Pipes Mechanical Properties

WERKSTOFF NR. 2.4360 ERW Pipe possess excellent mechanical properties, such as high tensile strength, good toughness, and low thermal expansion. The tensile strength of Monel 400 EFW Pipe ranges from 550 – 750 MPa, and their yield strength ranges from 240 – 440 MPa. They are also ideal for use in high-pressure and high-temperature environments, as they exhibit exceptional creep and stress-rupture strength.

Element Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
Monel 400 8.8 g/cm3 1350 °C (2460 °F) Psi – 80,000 , MPa – 550 Psi – 35,000 , MPa – 240 40 %

Monel 400 Pipes Equivalents

Monel 400 2.4360 N04400 NU-30M NA 13 NiCu30Fe NW 4400 МНЖМц 28-2,5-1,5

Monel 400 Pipes Uses

WERKSTOFF NR. 2.4360 ERW Pipe are used in a broad range of applications, including marine engineering, chemical processing, power generation, oil and gas, and other industries. They are found in valves, pumps, heat exchangers, piping systems, and many other components where excellent corrosion resistance, high strength, and high toughness are required. They are also commonly used in seawater applications due to their exceptional resistance to seawater corrosion.

Monel 400 Pipes Heat Treatment

UNS N04400 Welded Pipe are typically annealed at 926-1010°C and then cooled rapidly to prevent precipitation of the hard gamma prime phase. This annealing process helps to increase the ductility of the pipes and improve their workability. Monel 400 pipes can also be cold-worked to improve their strength, toughness, and hardness.

Monel 400 Pipes Corrosion Resistance

Alloy 400 pipe are highly resistant to corrosion, especially in alkaline and neutral environments. They are highly resistant to seawater corrosion, making them ideal for use in marine engineering applications. They are also resistant to stress corrosion cracking, pitting corrosion, and intergranular corrosion. The corrosion resistance of Monel 400 pipes makes them an excellent choice for use in harsh and corrosive environments.


Monel 400 Seamless Pipe are an incredibly versatile and durable material that can be used in a wide range of applications. They offer high strength, good toughness, excellent corrosion resistance, and good thermal conductivity. Monel 400 pipes are easy to work with and can be easily formed into various shapes and sizes. With their exceptional properties, they are a top choice for many industries, including chemical processing, power generation, oil and gas, and marine engineering. If you require a reliable, corrosion-resistant, and durable material, Monel 400 pipes might be the perfect fit for your application.

Related Post