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Monel 400

Seamless Pipe, Plate & Bar | ASTM B165 / B127 / N04400

Nickel-copper alloy engineered for resistance against seawater, hydrofluoric acid, and alkalis. Trusted in marine, petrochemical, and chemical processing sectors.

Technical Details
Composition(%):
Nickel
≥ 63.0
Copper
28.0 – 34.0
Iron
2.0 – 3.0
Manganese
≤ 2.0
Silicon
≤ 0.5
Carbon
≤ 0.30
Sulfur
≤ 0.024
Mechanical Properties:
Yield Strength: ≥ 170 MPa
Tensile Strength: ≥ 480 MPa
Elongation: ≥ 35%
Hardness: ~130–150 HB
Magnetic Permeability: <1.005
Melting Range: 1300–1350°C
Price & Availability

Updated: July 2025

Monel 400 Seamless Pipe | OD: ½”–10” | SCH 10–80
REGION
Standard
UNS
W.NR.
AVAILABILITY
PRICE(USD/KG)
China
ASTM B165
N04400
2.4360
In stock

24.8

UAE
ASTM B165
N04400
2.4360
1-2 weeks

27.5

Europe
ASTM B165
N04400
2.4360
2-4 weeks

31.9

** All prices are EXW. Ask for CFR/DDP terms for your location. Lead times vary by size and finish.
REGION
Standard
UNS
W.NR.
AVAILABILITY
PRICE(USD/KG)
China
ASTM B127
N04400
2.4360
1-2 weeks

22.5

UAE
ASTM B127
N04400
2.4360
In stock

25.9

Europe
ASTM B127
N04400
2.4360
2-3 weeks

30.2

** All prices are EXW. Ask for CFR/DDP terms for your location. Lead times vary by size and finish.
REGION
Standard
UNS
W.NR.
AVAILABILITY
PRICE(USD/KG)
China
ASTM B165
N04400
2.4360
In stock

24.7

UAE
ASTM B165
N04400
2.4360
1-2 weeks

28.3

Europe
ASTM B165
N04400
2.4360
Made-to-order

32.5

** All prices are EXW. Ask for CFR/DDP terms for your location. Lead times vary by size and finish.
Minimum Order Guideline

Product Form Minimum Order

Seamless Pipe ≥ 300 KG
Plate / Sheet ≥ 500 KG
Round Bar ≥ 250 KG
Mixed Items ≥ USD 10,000

** Trial orders available upon qualification approval.

Beyond Certified: Introducing The Alloy360 VANTAGE™ Program

Includes Free Pre-Shipment Third-Party Inspection (PMI, Dimensional, Visual, Photos) by SGS / TÜV

We don’t just sell certified material. We re-certify it ourselves and then have an independent expert verify it. This is our definition of uncompromising integrity.

More about Alloy360 VANTAGE™
Quick Specs
Density: 8.80 g/cm³
Tensile Strength: >480 MPa
Max Operating Temp: ~480°C

  • Ready stock available in seamless pipe, plate, bar, and custom fittings.

Available Forms: Seamless Pipe / Welded Pipe / Sheet / Plate / Round Bar / Flanges / Forged Fittings

Standards: ASTM B165, B127, B564

UNS: N04400

W.Nr.: 2.4360 / 2.4361

Property

value

Grade
Monel 400
UNS Number
N04400
Werkstoffnummer
2.4360 / 2.4361
Common Forms
Pipe, Plate, Sheet, Bar, Forging
Standards
ASTM B165 / B127 / B564
Applications
Seawater systems, Acid Plants, Heat Exchangers
Main Stock Locations
China, UAE, Europe
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FAQs

What industries rely on Monel 400?

Monel 400 is a standard material in marine engineering, chemical processing (especially hydrofluoric acid service), and petroleum refining. It’s widely used in heat exchangers, pump shafts, and alkylation units.

Is Monel 400 magnetic?

No. Monel 400 is non-magnetic in the annealed condition, which makes it ideal for sensitive applications like instrumentation, electronics, and naval sonar.

Can Monel 400 be used in high-temperature environments?

Yes, it retains strength and corrosion resistance up to ~480°C. For higher temperatures, Inconel or Hastelloy grades are recommended.

How does Monel 400 handle hydrofluoric acid (HF)?

Monel 400 is one of the few metals that resists hydrofluoric acid in all concentrations and temperatures. It’s the preferred alloy for HF alkylation units.

What’s the main difference between Monel 400 and Monel K500?

K500 is a precipitation-hardened version of Monel 400 with nearly twice the strength. However, Monel 400 offers better ductility, weldability, and is easier to machine.

Is Monel 400 weldable?

Yes, using Monel filler metal 60. However, attention must be paid to heat input and post-weld stress relief in critical applications.

Is Monel 400 better than stainless steel in seawater?

Absolutely. Unlike 316L, Monel 400 does not suffer from pitting or crevice corrosion in chloride-rich environments like seawater.

Testing & Certifications

Non-Destructive Testing (NDT):

Hydrostatic Pressure (Pipes)
PMI / XRF / Ultrasonic / Eddy Current

Destructive Testing (DT):

Tensile
Hardness
Flattening
Bending

Documentation & Compliance:

• EN 10204 3.1 MTC

• 3.2 Inspection (SGS, BV, TUV available)

• NACE MR0175 / ISO 15156 available

Heat and batch traceability for EPC & O&G compliance

Smart Message

Monel 400 – Where Corrosion Surrenders

Engineered for extremes, Monel 400 defies seawater, acid, and alkalis with ease. Magnetic? Never. Compromise? Not an option.

Monel 400 – Common Standards & Industrial Use Cases
ASTM B165

Seamless pipe and tub

ASTM B127

Plate, sheet, and stri

ASTM B564

Flanges, forged fitting

Used In:
Desalination plants
Hydrofluoric acid alkylation units
Marine shafts and seawater piping
Heat exchangers and condenser tubing
Caustic soda production and storage vessels

Monel 400 vs Other Corrosion-Resistant Alloys

Property

316L SS

Hastelloy C276

Inconel 600

Monel 400

Ni Content (%)
~10–14
~57
~72
~63
Seawater Resistance
Moderate
Excellent
Good
Excellent
Acid Resistance
Low
Excellent
Moderate
High
Cost
Low
Very High
High
Moderate
Non-Magnetic
Yes
Yes
Slight
Yes
Application Fit
General
Chemicals
Heat/Steam
Marine & HF Acid

Monel 400 vs Other Corrosion-Resistant Alloys

Property

316L SS

Ni Content (%)
~10–14
Seawater Resistance
Moderate
Acid Resistance
Low
Cost
Low
Non-Magnetic
Yes
Application Fit
General

Property

Hastelloy C276

Ni Content (%)
~57
Seawater Resistance
Excellent
Acid Resistance
Excellent
Cost
Very High
Non-Magnetic
Yes
Application Fit
Chemicals

Property

Inconel 600

Ni Content (%)
~72
Seawater Resistance
Good
Acid Resistance
Moderate
Cost
High
Non-Magnetic
Slight
Application Fit
Heat/Steam

Property

Monel 400

Ni Content (%)
~63
Seawater Resistance
Excellent
Acid Resistance
High
Cost
Moderate
Non-Magnetic
Yes
Application Fit
Marine & HF Acid

Related Grades

Explore corrosion-resistant and high-performance alloys:

Hastelloy C276 – For aggressive acidic service

Inconel 600 – For high-temperature oxidizing conditions

Titanium Grade 2 – Lightweight and corrosion-resistant

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