Monel 400 Pipes and Tubes

Monel 400 Pipes and Tubes

Monel 400 pipe suppliers state that the alloy is produced by blending nickel and copper,
together with more of the other elements. Monel 400 seamless tube and pipes offer both
exceptional performance and cost effectiveness.

Monel 400 seamless tubes are not difficult to machine and good industry practice will give
better results. Neither preheating nor post weld heat treatment is usually required.

Production Process

Alloy 400 or UNS N04400 are manufactured such as ERW ( Electric Resistance Welded),
Seamless and EFW ( Electric Fusion Welding) pipes and tubes have different forms like round,
square, rectangle, etc. with particular ends like the plain end, bevel end, and threaded end with
a regular thickness of different schedule which range from SCH 5 to SCH XXS.


MONEL 400 NO4400 NA 13 NiCu30Fe 2.436 NU-30M МНЖМц 28-2,5-1,5 NW 4400 B 165, B 163,B 725,B 730

The process through which monel 400 tube fittings and pipes can be created include cold
pilgering process, extrusion process, tube mill process as well as the piercing process which
need to be followed by heat treatment and mechanical testing.

Fabrication and Heat treatment

Monel 400 pipe fittings and tubes can undergo forming, machining, and joining operations
while fabricating. Hot working conditions should be followed between 1200°F and 2150°F.

In Monel 400 seamless tube and pipes, annealing will completely soften work-hardened
material and is worked by holding at temperatures ranging from 1600°F and 1800°F for 2 to 10
minutes which needs to be followed by rapid quench and cold working should be performed on
annealed material.


Monel 400  Seamless Pipe  :  ASTM/ASME B 165 / SB 165
Monel 400 Seamless tube  :  ASTM/ASME B 163 / SB 163
Monel 400 ERW Pipe          :  ASTM/ASME B 725/ SB 725
Monel 400 ERW Tube         :  ASTM/ASME B 730/ SB 730


Monel 400 can only be hardened by cold working, monel 400 tube fittings exhibit excellent
weldability and better strength, along with its corrosion resistance. Monel 400 pipe fittings
have great mechanical properties at below-freezing temperatures and can be used in
temperatures up to 1000° F.

Mechanical properties

Grade Tensile Strength Yield Strength Elongation
[MPA] [MPA] (% in 50mm) min
MONEL 400 485 193 35

Monel 400 pipes and tubes have good resistance to corrosion by various reducing media. It is
also usually more resistant to attack by oxidizing media than better copper alloys. This
versatility makes alloy 400 suitable for service in a range of environments.

Physical properties

Grade Density (g/cm3) Elastic Modulus (GPa) Co-eff of Thermal Expansion (μm/m/°C) Thermal Conductivity (W/m.K) Electrical Resistivity (μΩ.m)
Monel 400     0-100°C 0-315°C 0-538°C at 100°C at 500°C  
7.82 190 13.7 14.2 20 850

Monel alloy 400 is a high-performance alloy that contains nickel, copper, additions of iron and
manganese give it sensible properties ideal for industrial use. It’s optimally resistant to
seawater, due to which it is often used to carry water in the marine sector. It has excellent
resistance to stress-corrosion cracking in freshwater.

Chemical composition

Grade   c Ni Fe Cu Si Mg S
Monel 400 MIN 63 28
MAX 0.3 70 2.5 34 0.5 2 0.024


Monel 400 tube fittings are commonly used in marine manufacturing, hydrocarbon and
chemical treating, pumps, valves, and heat exchangers, etc. These monel 400 pipes are
appreciated for its consent to outbreaks by alkali and acid, together with soaring mechanical
potential and excellent ductility.


  1. Off-Shore Oil Drilling Companies
  2. Power Generation
  3. Petrochemicals
  4. Gas Processing
  5. Specialty Chemicals
  6. Pharmaceuticals
  7. Pharmaceutical Equipment
  8. Chemical Equipment
  9. Sea Water Equipment