Monel 400 Pipe & Tube (UNS N04400)
Nickel-Copper alloy tubing designed for seawater corrosion resistance, chemical processing, and marine engineering applications.
Monel 400 offers excellent resistance to flowing seawater, neutral salts, and reducing environments.
It is widely used in marine systems, heat exchangers, pump shafts, and chemical equipment where stainless steel is insufficient.
Product Forms of Monel 400 Pipe & Tube
Monel 400 is supplied in multiple pipe and tube formats to meet different pressure, corrosion and fabrication requirements.
Seamless Pipe & Tube
High-strength seamless tubing for seawater, offshore and chemical processing systems with superior pressure resistance.
Welded Pipe & Tube
Cost-efficient welded solutions for medium-pressure applications in industrial and chemical systems.
Precision Tube
High-accuracy tubing for instrumentation, heat exchangers and control systems requiring tight tolerances.
Manufacturing Processes
Different manufacturing routes define the mechanical performance, dimensional accuracy and application suitability of Monel 400 pipes and tubes.
Cold Drawn Seamless Tube
High dimensional accuracy and tight tolerance control for precision applications.
Hot Finished Seamless Pipe
Suitable for heavy wall thickness and high-pressure industrial systems.
ERW Welded Tube
Cost-effective solution for medium-pressure chemical and structural applications.
EFW Welded Pipe
Ideal for large diameter welded pipelines and industrial transport systems.
TIG Welded Precision Tube
High precision welding for instrumentation and control systems requiring clean finish.
Applications of Monel 400 Pipe & Tube
Monel 400 pipe and tube (UNS N04400) is widely used in seawater corrosion resistant piping systems, chemical processing equipment,
offshore oil and gas platforms, and heat exchanger tubing applications where stainless steel cannot provide sufficient resistance to chloride environments,
reducing acids, and high-velocity seawater conditions.
Marine & Seawater Systems
Excellent resistance to seawater corrosion, suitable for pump shafts and seawater piping systems.
Chemical Processing
Performs well in reducing acids and alkaline environments, used in heat exchangers and reactors.
Oil & Gas Offshore
High resistance to flowing seawater and chloride-rich offshore environments, including subsea systems and desalination plants.
Heat Exchangers
Used for ASTM B163 tubes in condensers, coolers, and boiler service applications.
Product Specifications of Monel 400 Pipe & Tube
Monel 400 pipes and tubes are supplied in a wide range of industrial and precision dimensions.
Specifications are based on ASTM standards for chemical, marine, offshore and heat exchanger applications.
Industrial Pipe (Monel 400 Pipe)
| Item | Specification Range | Standard | Application |
|---|---|---|---|
| Size | 1/2" – 24" | ASME B36.19 / B36.10 | Industrial piping systems |
| Schedule | SCH 10 / 40 / 80 / 160 / XXS | ASME B36.10 | Pressure design systems |
| Material Standard | UNS N04400 | ASTM B165 / ASME SB165 | Seawater / chemical piping |
Precision Tube (Monel 400 Tube)
| Item | Specification Range | Standard | Application |
|---|---|---|---|
| Outer Diameter (OD) | 0.3 – 114.3 mm | ASTM B163 / B725 | Heat exchangers / instrumentation |
| Wall Thickness | 0.1 – 6.0 mm | ASTM B163 / B725 | Precision fluid systems |
| Manufacturing Condition | Cold Drawn / Annealed | ASTM B165 / B163 | High accuracy applications |
| Product Types | Seamless / Welded | ASTM B165 / B725 | Industrial & precision systems |
* Dimensions and tolerances can be customized according to project requirements and international standards.
Extended Product Forms of Monel 400
Beyond standard seamless and welded products, Monel 400 tubing can be supplied in specialized forms for heat transfer, instrumentation, marine engineering, and custom fabrication projects. These product variations support a wide range of industrial requirements and provide additional flexibility for OEM and EPC applications.
Round Pipe
Standard industrial piping for pressure service, marine systems and chemical processing.
Round Tube
General-purpose tubing for fabrication, heat transfer and fluid handling systems.
Square Tube
Suitable for structural supports, frames and specialized engineering assemblies.
Rectangular Tube
Used where improved structural rigidity and custom fabrication are required.
Coiled Tube
Long continuous tubing for instrumentation, hydraulic and offshore control systems.
U-Bent Tube
Commonly used in heat exchangers, condensers and thermal transfer equipment.
Capillary Tube
Precision small-diameter tubing for flow measurement and analytical instruments.
Instrumentation Tube
High-quality tubing designed for process control and measurement applications.
Heat Exchanger Tube
Manufactured to ASTM B163 requirements for condensers, coolers and exchangers.
Why Choose Monel 400 Pipe & Tube
Monel 400 is one of the most widely used nickel-copper alloys for marine, chemical processing and offshore applications. Its combination of corrosion resistance, mechanical strength and fabrication capability makes it a preferred alternative to many stainless steels in demanding service environments.
Seawater Resistance
Excellent resistance to flowing seawater and marine atmospheric exposure.
Chloride Resistance
Performs well in chloride-rich environments where many stainless steels may fail.
Long Service Life
Proven durability in offshore, desalination and industrial processing systems.
Excellent Fabricability
Suitable for welding, bending, forming and machining operations.
Proven Offshore Performance
Extensively used in marine engineering and offshore oil & gas projects worldwide.
Request a Quote for Monel 400 Pipe & Tube
Looking for Monel 400 seamless pipe, welded tube, heat exchanger tubing or custom fabricated products? Send us your required size, specification, quantity and destination. Our team will provide technical support, availability information and a competitive quotation within 24 hours.
UNS N04400
ASTM B165
ASTM B163
ASTM B725
Custom Sizes Available
Worldwide Delivery
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