Monel 400 Tubes Specifications

The specifications of Monel 400 tubes, including standards, forms, dimensions, finishes, and more, are provided in the table below.

Parameter Specification
Standards ASTM B165 (Seamless Tube), ASTM B163 (Condenser & Heat Exchanger Tubes), ASTM B725 (Welded Tube), ASTM B730 (Welded Pipe)
Form Seamless, Welded, ERW, EFW
Outer Diameter (OD) 6.35 mm (1/4 in.) to 114.3 mm (4.5 in.)
Wall Thickness 0.8 mm to 12.7 mm
Length Single Random, Double Random, Custom Length
End Type Plain End, Bevelled End, Threaded
Surface Finish Annealed, Pickled, Polished
Manufacturing Process Cold Drawn / Cold Rolled (Seamless), Welded & Fabricated
Heat Treatment Annealed condition

Monel 400 Tube Sizes

Monel 400 tubes are stocked in a wide OD and wall thickness range to cover instrumentation, heat exchanger, and general piping needs.

Dimension Range
Outside Diameter (OD) 6.35 mm (1/4 in.) to 114.3 mm (4.5 in.)
Wall Thickness 0.8 mm to 12.7 mm
Length Up to 26 metres (random and cut lengths)

Fractional OD sizes (1/4 in., 3/8 in., 1/2 in., 3/4 in.) are available for instrumentation runs. Metric OD sizes are supplied for DIN or EN projects. Custom combinations can be produced on request with applicable minimum order quantities.

Monel 400 Tube Price

In India, the price of Monel 400 tubes starts at Rs 1,000 per kilogram. In other countries, it costs between $30 and $60 per kilogram. Prices depend on the OD, wall thickness, quantity, form, and finish. Get in touch with Sachiya Steel International to get a quote with the exact price for the size you need.

Chemical Composition of Monel 400 Tubes

The table below lists the elemental composition of Monel 400 tubes per ASTM B163 / ASME SB-163 specifications.

Nickel and copper form the alloy base. Iron, manganese, and silicon are controlled additions that influence fabricability. Low carbon and sulphur limits prevent hot cracking during welding.

NickelNi
63.0 min
CopperCu
28.0 to 34.0
IronFe
2.50 max
ManganeseMn
2.00 max
CarbonC
0.30 max
SiliconSi
0.50 max
SulphurS
0.024 max

Mechanical Properties of Monel 400 Tubes

Monel 400 tubes in annealed condition meet the following minimum mechanical property requirements per ASTM B163.

Stress-relieved tubes can achieve higher tensile and yield values depending on cold work. The density of 8.83 g/cm3 is used for weight calculations in tube bundle design.

70 / 485
MPa (ksi)
Tensile Strength
28 /195
MPa (ksi)
Yield Strength (0.2% Offset)
35
%
Elongation (min)
110–149
HB
Hardness (typical)
Property Value
Tensile Strength 70 ksi (485 MPa)
Yield Strength (0.2% Offset) 28 ksi (195 MPa)
Elongation (min) 35%
Density 8.83 g/cm3
Hardness 110 to 149 HB (typical)
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Monel 400 Tube Equivalent Materials

The international equivalent designations of Monel 400 tubes, including UNS, Werkstoff, JIS, and more, are listed in the table below.

Designation Equivalent
UNS N04400
Werkstoff Nr. 2.4360
JIS NW4400
AFNOR NU-30M
EN NiCu30Fe

Industrial Applications of Monel 400 Tubes

Monel 400 alloy tubes find use across 4 major sectors where corrosion resistance and mechanical strength are required.

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Monel 400 Tube vs Stainless Steel 316 Pipe

The table below compares both Monel 400 pipe and Stainless Steel 316 pipe. Monel 400 outperforms SS316 in seawater, hydrofluoric acid and de-aerated sulfuric acid.

Monel 400 is preferred where marine exposure, HF acid or chloride stress-corrosion cracking is required.

Property Monel 400 Pipe SS316 Pipe
Nickel Content 63% min 10 to 14%
Seawater Resistance Excellent, no pitting Moderate, pitting risk
HF Acid Resistance All concentrations Not recommended
Chloride SCC Resistance Immune Susceptible above 60 degrees C
Cost Higher (nickel-rich) Lower

Shipping & Packaging

Main export packaging setup Heavy-duty wooden boxes Packing
Export Packaging Standard

We strictly follow seaworthy export handling standards to protect Monel 400 tubes from transit damage, moisture ingress, and surface contamination during long-distance dispatch.

  • Heavy-duty wooden boxes with moisture barrier lining
  • HDPE stretch film wrapping on all bundles
  • Plastic end caps on threaded and plain-end pipes
  • Silica gel desiccants to minimize moisture exposure
  • ISPM-15 fumigated wooden packaging for export
shipping preparation Tube Bundle Yard Staging
Shipping packaging Container End-Cap Protection
Shipping stock Wrapped Export-Ready Bundles

We Export Worldwide

Sachiya Steel International supplies Monel products to major industrial markets across North America, Europe, the Middle East, Asia and Africa with export-ready documentation and logistics support.

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Frequently Asked Questions

What is the pressure rating of Monel 400 Tubing?+
Monel 400 tubing pressure ratings depend on OD, wall thickness, and allowable stress at the design temperature. For a 1/2 in. OD tube with 0.049 in. wall in annealed condition, working pressure per ASME B31.3 is approximately 4,800 psi (33 MPa) at ambient temperature. Actual ratings vary by size.
What is the difference between ASTM B163 and ASTM B165 for Monel 400 Tubes?+
ASTM B163 covers seamless condenser and heat-exchanger tubes with tighter OD tolerances and hydrostatic testing requirements. ASTM B165 covers seamless pipe and tube for general corrosion-resistant service. B163 is typically ordered for thermal transfer applications.
What sizes are available for Monel 400 Tubes?+
Monel 400 tubes are available in OD from 6.35 mm (1/4 in.) to 114.3 mm (4.5 in.), wall thicknesses from 0.8 mm to 12.7 mm, and lengths up to 26 metres. Fractional and metric sizes are both stocked.
Is Monel 400 Tubing compatible with swagelok fittings?+
Monel 400 tubing in standard fractional OD sizes (1/4 in., 3/8 in., 1/2 in.) is fully compatible with compression-type instrumentation fittings. OD tolerances must fall within the fitting manufacturer's specified range.
Can Monel 400 Tubes be used at sub-zero temperatures?+
Monel 400 retains strong toughness and ductility at sub-zero temperatures down to cryogenic levels. The alloy does not undergo a ductile-to-brittle transition like carbon steel.
What is the maximum operating temperature for Monel 400 Tubes?+
The maximum continuous service temperature is 538 °C (1,000 °F). Above this threshold, oxidation rates increase and mechanical properties decline.
What is the difference between Monel 400 and Monel K-500 Tubes?+
Monel 400 is solid-solution strengthened and gains strength only through cold working. Monel K-500 adds aluminium and titanium, making it age-hardenable with roughly double the yield strength after heat treatment. Both share the same base corrosion resistance.
What is the price of Monel 400 Tubes per kg?+
Prices start from approximately Rs 1,000/kg in India and $30 to $60/kg internationally, based on size, form, and quantity. Contact Sachiya Steel International for exact pricing.

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