Monel 400 tube

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Monel 400 tube
What is Monel 400 tube?

An alloy composition of nickel and copper is called Monel 400 tube, which at high temperatures is resistant to caustic solutions and seawater. It contains 66.5% Nickel, 31% Copper, 2.5% iron, 2% Manganese, 0.3% Carbon, 0.5% Silica, 0.024% Sulphur. It is known for its excellent strength, the only material resistant to acids and alkalis.

It is highly ductile and has good conductivity properties. In cold working environments, it can be easily hardened. It delivers excellent corrosion resistance properties for temperatures ranging from sub-zero to 1000° F.

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Suppliers of genuine Monel 400 seamless tubes in India in accordance with ASTM B165, see difference between Inconel 600 and Monel 400

What is the difference between Inconel 600 and Monel 400?

Although both provide resistance to corrosion, there is huge difference between Inconel 600 and Monel 400, starting from their chemical composition.

  • Inconel 600 is an alloy composition of Nickel and Chromium and are best known for its excellent performance level. It provides good thermal conductivity.
  • On the other hand, alloy 400 welded tube is made of Nickel and Copper. Due to the presence of Chromium, Inconel 600 is stronger. This is because Chromium increases strength of alloy.
  • Considering both providing corrosion resistance nature, again due to the presence of Chromium in Inconel 600, it provides better corrosion resistance, which also enhances its reliability on a large scale.
  • Presence of alloys in Inconel 600, which are a good conductor of electricity, it provides more electric conductivity properties. The only difference lies that Inconel 600 has Iron. This is the prime reason for it to be electrically more conductive.
  • Both the materials have good heat tolerance. But Inconel 600 shows more thermal Conductivity properties than Monel 2.4360 redrawn tube due to the presence of Iron.

unable to easily obtain UNS N04400 exhaust tube in unusual sizes ? check out our selection of sizes range from 12mm to 260 mm or custom at an actual cost, know why alloy 400 tube is expensive ?

Alloy 400 tube

Alloy 400 tube

Monel 400 tubing

Monel 400 tubing

Monel 400 seamless tube

Monel 400 seamless tube

Why is alloy 400 tube expensive?

Because it resembles same properties with Nickel-copper, alloy 400 tube material is expensive than other stainless steel. As a result, these types of products are recommended for use than the ones which are cheaper to withstand critical conditions such as high temperature, corrosive environments, and high strength requirements.

Another reason of this material to be expensive is because of the higher contents of copper in the range of 28-40% and minimum 63% Nickel, which are best known for exhibiting excellent properties in critical conditions. They also contain Iron, Manganese, Silica, Carbon in small amounts.

Reasonable pricing and quotations are provided by us at, along with the sample products being provided, so that you can use UNS N04400 exhaust tubing and then purchase it if it exhibits excellent properties to meet your needs and standards.

As a stockist wide variety of nickel alloy 400 annealed tubes and monel 400 tubing are available in 1 mm to 7.62 mm wall thickness with us in Mumbai, view its complete specification

Monel 400 tube specification
Monel 400 tube specification


Size Length Wall thickness
.125 to 2 " OD 6 to 12 meter .028 to .072"
Specification MTC Process
ASTM B165 | ASME SB165 EN 10204 3.1 &3.2 seamless, hot rolled, annealed, welded
We can provide Monel 2.4360 redrawn tube in basically any size if you require it with the highest standards and quality, must know its types
Basic types of alloy 400 tube
UNS N04400 exhaust tubing

UNS N04400 exhaust tubing

  • OD: 6.00 to 914.4 mm
  • Thickness: 0.3 to 50 mm
  • SCH 5 to SCH XXS
Nickel alloy 400 annealed tube

Nickel alloy 400 annealed tube

  • ERW
  • Seamless
  • Welded
DIN 2.4360 redrawn tube

DIN 2.4360 redrawn tube

  • Square
  • Round
  • Rectangular
We are offering the most competitively priced DIN 2.4360 extruded tube with Mill TC, view its properties
DIN 2.4360 tubing chemical properties
Grade S Mn Ni Si C Cu Fe
Monel 400 0.024 max 2.00 max 63.00 min 0.50 max 0.30 max 28.00 – 34.00 2.50 max
UNS N04400 exhaust tubing equivalent
Monel 400 N04400 NU-30M 2.4360 NiCu30Fe NW 4400 МНЖМц 28-2,5-1,5 NA 13
Nickel alloy 400 annealed tube mechanical properties
Element Tensile Strength Melting Point Yield Strength (0.2%Offset) Density Elongation
Monel 400 Psi – 80,000 , MPa – 550 1350 °C (2460 °F) Psi – 35,000 , MPa – 240 8.8 g/cm3 40 %
What is the disadvantage of Monel 400 tubing?

Although Monel 400 tubing comes with unique and excellent characteristics, there are some disadvantages of this material which we need to look upon. Due to the presence of higher contents of Nickel and Copper, it is expensive than any other alloy or stainless steel.

In other words, cost efficiency is the prime disadvantages. Although stainless steels cannot withstand extreme conditions and offer significant cost, they cannot withstand unique and critical conditions. But with this material, we can expect longevity, durability and high strength.

What are 3 uses of Monel 400 seamless tube ?

Monel 400 seamless tube comes with the size range of 4-219 mm, thickness ranging between 0.5-20mm, and length types of single, double random and cut length.

  • It is ideal for use case in chemical, oil and marine industries, because of its slight magnetic nature at room temperatures.
  • They are also used in feed water and steam generating tubing, which require high temperature as the main characteristic.
  • Nickel alloy 400 annealed tube is also used for hydrocarbon processing equipment, valves and shafts. Marine engineers also make use of this material. All these industries make use of this product because of 20-40 % Chromium and min 63% Nickel composition, which do not corrode or rust easily.
What is the difference between Monel 400 and 500?

Distinctive difference emerge when comparing Monel 400 and Monel 500, based on the specific industrial and manufacturer’s demands.

A material well equipped with high corrosion resistance properties, which can only be hardened by cold working environments is the nickel 400 superheater tubes. It has excellent strength and shows toughness over a large range of temperatures.

Although both are composed of Nickel-Copper alloy composition, more advantageous for Monel 500, on the other hand, is its hardness and strength. This is achieved by adding Aluminium and Titanium. Adding to this, Monel 500 contains less impure elements than 2.4360 Monel 400 heat exchanger tube.

Because Monel 500 comprises less Sulphur content (<0.1%), they have better tensile strength and durability. As a result, this material is a must to be applicable for industries that require materials which are hard and have excellent strength.

Surface finish of Monel 400 tubing
Surface Finish (OD) External Surface (ID)Internal Surface
(RA)Roughness Average (RA) Roughness Average
μm μ inch μm μ inch
BA Beight Annealed 0.8 32 1.0,0.8,0.6,0.5 40,32,25,20
AP Annealed & Pickled 1.0 or Not defined 40 or Not defined Not defined Not defined
EP Electro Polish 0.8 32 0.38,0.25,0.20;0.13 15,10,7,5
MP Mechanical Polish 0.8 32 1.0,0.8,0.6,0.5 40,32,25,20
Pressure rating of nickel alloy 400 seamless tube
Tube O.D.
Wall Thickness of Tube (inches)
.065 .035 .028 .049 .095 .083 .120 .109
Working Pressure (psig)
1 2200 3400 2900 4300 3900
1/4 9500 4800 3700 7000
1/8 10100 7900
1/2 4400 2300 3200
5/16 7300 3700 5400
3/8 6100 3100 4400
3/4 3000 2200 4600 4000