Monel 400 Pipe Specifications

The table below shows the main specifications for Monel 400 seamless and welded pipes. These pipes are made to ASTM and ASME standards and are available in many sizes for corrosion-resistant industrial piping systems.

Property Detail
Standards ASTM B165 / ASME SB-165 (Seamless), ASTM B725 / ASME SB-725 (Welded)
Seamless OD Range 4 mm to 219 mm (0.157 in. to 8.625 in.)
Welded OD Range 5.0 mm to 1219.2 mm (0.197 in. to 48 in.)
Wall Thickness 0.5 mm to 20 mm
Schedules Sch 5, 10, 40, 80, 160, XXH
Length Single Random, Double Random, Cut Length
Form Seamless, Welded, ERW

Monel 400 Pipe Sizes

Monel 400 pipe comes in both seamless and welded types and is available in many sizes to suit different industrial piping needs.

Parameter Specification
Seamless OD Range 4 mm to 219 mm (0.157 in. to 8.625 in.)
Welded OD Range Up to 1219.2 mm (Up to 48 in.)
Wall Thickness 0.5 mm to 20 mm
Available Schedules Sch 5, 10, 40, 80, 160, XXH

Pipe Schedule and Wall Thickness

Monel 400 pipe schedule numbers define wall thickness for each nominal pipe size.

NPS (in.) OD (mm) Sch 10 WT (mm) Sch 40 WT (mm) Sch 80 WT (mm)
1/2 21.3 2.11 2.77 3.73
1 33.4 2.77 3.38 4.55
2 60.3 2.77 3.91 5.54
4 114.3 3.05 6.02 8.56

Monel 400 Pipe Weight Chart

Below are approximate weights per metre for Alloy 400 pipe at Sch 40 (density: 8.84 g/cm3).

NPS (in.) Sch 40 WT (mm) Weight (kg/m)
1/2 2.77 1.27
1 3.38 2.50
2 3.91 5.44
4 6.02 16.07

Monel 400 Pipe Price

Monel 400 pipe prices start from approximately INR 300/kg in India for standard sizes. In the international market, FOB prices typically range from $25 to $48 per kg depending on form, outer diameter, wall thickness, and schedule. Seamless pipes cost more than welded forms. Final pricing is influenced by order quantity, nickel and copper market surcharges, surface finish, and certification requirements.

Chemical Composition of Monel 400 Pipe

The table below outlines the chemical composition of Monel 400 pipe by weight % as specified under ASTM B165 / ASME SB-165.

Nickel Ni
63.0% min
Copper Cu
28.0 - 34.0%
Iron Fe
2.50% max
Manganese Mn
2.00% max
Silicon Si
0.50% max
Carbon C
0.30% max
Sulfur S
0.024% max

Mechanical Properties of Monel 400 Pipe

The table below outlines the key mechanical properties of Monel 400 pipe as specified under ASTM B165 / ASME SB-165 in both metric and imperial units.

70 / 485
MPa (ksi)
Tensile Strength (min)
28 /195
MPa (ksi)
Yield Strength, 0.2% Offset (min)
35
%
Elongation in 50 mm / 2 in. (min)
8.84 / 0.319
g/cm³ (lb/in³)
Density
Property Metric Imperial
Tensile Strength (min) 485 MPa 70 ksi
Yield Strength, 0.2% Offset (min) 195 MPa 28 ksi
Elongation in 50 mm / 2 in. (min) 35% 35%
Density 8.84 g/cm3 0.319 lb/in3
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Equivalent Designations

The table below lists Monel 400 pipe's globally accepted equivalent grades across major regions. It is recognised under several international standards and trade designations.

Standard Designation
UNS N04400
W.Nr. 2.4360
EN NiCu30Fe
BS 3076 NA13
JIS NW 4400

Monel 400 Pipe Applications

Monel 400 pipe is used in marine, chemical processing, oil and gas and heat exchanger systems at temperatures up to 480°C (1000° F).

Marine & Offshore Piping

Monel 400 pipe effectively handles seawater, brackish water, and high-velocity brine environments without risk of pitting or stress-corrosion cracking.

Chemical & Hydrocarbon Processing

The alloy resists hydrofluoric acid at all concentrations. Monel 400 pipe is a standard choice in HF alkylation units and caustic soda service.

Heat Exchangers & Condensers

Monel 400 pipe serves in feedwater heaters, condenser shells and process heat exchangers where steam and brine are present.

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Monel 400 Pipe 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°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 Pipe 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 Pipe 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.

  • USA flagUSA
  • Canada flagCanada

Frequently Asked Questions

What is the specification of Monel 400 pipe?+
Monel 400 seamless pipe is manufactured to ASTM B165 / ASME SB-165, and welded pipe follows ASTM B725 / ASME SB-725.
Is Monel 400 pipe better than SS316 pipe?+
Monel 400 pipe outperforms SS316 in seawater, hydrofluoric acid and de-aerated sulfuric acid environments. It is immune to chloride stress-corrosion cracking. SS316 is more cost-effective for general corrosion resistance.
What is the price of Monel 400 pipe?+
Prices of Monel 400 pipe in India begin at roughly INR 300 per kg for standard sizes. While in the US, the prices range from $25 to $48 per kg. The final price will vary based on outside diameter, wall thickness, schedule, the quantity ordered, and the current market rates for nickel and copper.
What applications use Monel 400 pipe?+
Monel 400 pipe is used in marine engineering, chemical processing, oil and gas and heat exchanger systems at temperatures up to 480 °C (1000 °F).
What is the difference between Seamless and Welded Monel 400 pipe?+
Seamless Monel 400 pipe (ASTM B165) withstands higher pressure since it has no weld joint. Welded Monel 400 pipe (ASTM B725) is a more economical choice and is supplied in larger diameters.
What welding filler metal is used for Monel 400 pipe?+
Monel 400 pipe is welded using ERNiCu-7 filler metal (AWS A5.14) for GTAW/GMAW, or ENiCu-7 electrodes (AWS A5.11) for SMAW. Preheat isn't required.
Where can I buy Monel 400 pipe?+
Sachiya Steel International is a prominent supplier of Monel 400 pipe in Mumbai, India. We maintain a ready supply of both seamless and welded pipe, complete with mill test certificates.

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