The seamless Monel 400 pipe offers high-pressure containment and leak-proof performance because it lacks a welded seam, eliminating the potential weak point often associated with welded constructions.
ASTM B165 Monel 400 Seamless Pipe Manufacturer
We at XTD (Zhejiang Xintongda Special Steel) are a trusted supplier of Monel 400 seamless pipes. Monel 400 seamless pipes, also known as UNS N04400 seamless pipes, are high-strength nickel-copper alloy pipes manufactured without a welded seam. With a chemical composition of approximately 63–70% nickel, 28–34% copper, and controlled amounts of iron (up to 2.5%) and manganese, our Monel 400 pipe is manufactured according to the ASTM B165 standard. The manufacturing process includes cold rolling, cold drawing, annealing, pickling, and straightening, ensuring outstanding leak-proof performance and high ductility. This pipe offers exceptional strength and corrosion resistance benefits to a wide range of applications. These cold-worked seamless pipes are specifically designed for high-performance applications in intensely corrosive and high-temperature environments, handling temperatures from cryogenic levels (-320°F / -196°C) to approximately 800°F (427°C) for stressed applications, with short-term exposure possible up to 1000°F (538°C) in low-stress operating conditions. With a 25,000 ton capacity, we ensure quick delivery in about one week for stock products and 15 to 60 days for new production orders.
Monel 400 Seamless Pipe Specifications
We manufacture our high-quality Monel 400 pipe according to strict industry standards and specifications, such as:
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Standard
ASTM B165
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OD Range
6-457 mm
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Thickness
1-65 mm
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Length
≤ 18 m
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Technical Data
Technical Data
Alloy 400 Seamless Pipe Manufacturing Process
We ensure high-quality Monel 400 pipe by adhering to strict manufacturing procedures. The process begins with the raw nickel-copper alloy. To achieve precise dimensions, the seamless pipe is meticulously shaped and refined using cold rolling and cold drawing. Then it is followed by annealing, pickling and straightening procedures to improve mechanical qualities and surface quality. To know more about the manufacturing process, visit our page.
Key Features of Monel 400 Pipe
The Monel 400 seamless nickel alloy has 6 essential properties that make it ideal for severe operating conditions. These include corrosion resistance, resistance to hydrofluoric and sulfuric acids, resistance to alkalis, mechanical stability, resistance to stress corrosion cracking, and resistance to seawater erosion.
- Corrosion Resistance: The key benefit of our Monel 400 pipe is its exceptional corrosion resistance, which is due to its nickel-copper content. This chemical composition offers a long service life and consistent performance in severely damaging environments.
- Superior resistance to hydrofluoric acid (HF) and sulfuric acid: Our Alloy 400 pipe is extremely resistant to hydrofluoric acid across a wide range of concentrations and temperatures. It also offers good resistance to deaerated sulfuric acid at moderate concentrations and alkalis.
- Resistance to Alkalis: The nickel-copper alloy UNS N04400 exhibits excellent resistance to a wide range of alkaline solutions, including various concentrations and temperatures. This enables the material to handle caustic substances in chemical processing.
- Outstanding Creep and Fatigue Resistance: Due to the solid-solution strengthening of Monel 400, the pipe maintains reliable mechanical properties and fatigue resistance at moderate temperatures.
- Excellent Resistance to Stress Corrosion Cracking in Freshwaters: The nickel and copper content create a stable microstructure that helps the alloy resist stress corrosion cracking in freshwaters.
- Excellent Resistance to Rapidly Flowing Brackish Water or Seawater: The high copper content forms a protective layer when the pipe is exposed to seawater. This film resists corrosion against brackish water or seawater.
Monel 400 Equivalent Materials
Monel 400 grade, a well-known high-performance nickel-copper alloy, is used in various industries. The main equivalent designation includes UNS N04400 and Werkstoff Nr. 2.4360, but many common global equivalents ensure supply consistency for materials across the world.
| GRADE | UNS | GB | JIS | ISO | DIN/EN | GOST | |
| ISC | NEW | ||||||
| Monel 400 | N04400 | H04400 | NS3400 | - | - | 2.4360 | - |
100% Certified Testing & Documentation
- EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC)
- Raw Materials Certificate
- 100% PMI
- Heat Treatment Charts
- Third-Party Inspection Report
- Surface roughness and size measurement
- Manufacturer Test Certificate (Impact Testing, Flattening, Flare, Bend, Hardness, Intergranular, Pitting Corrosion, Grain size, ET, UT, HT)
- Laboratory Test Certificate from the Government-Approved Lab
ASTM B165 UNS N04400 Seamless Pipe Industrial Applications
The 8 industrial applications of our Monel 400 seamless nickel alloy pipe leverage its superior resistance to highly corrosive and high-temperature environments, making it indispensable in diverse high-performance sectors.
Feed-Water and Steam-Generator Tubing
It is used in power generation, especially within steam-producing devices, where water is heated to produce steam.
Brine Heaters and Seawater Scrubbers
They are used in seawater and desalination plants for the treatment of aggressive seawater.
Alkylation Plants (Sulfuric/Hydrofluoric Acid)
These are essential for transfer piping and processing vessels dealing with concentrated hydrofluoric acid in gasoline production.
Transfer Piping from Oil Refinery Crude Columns
Designed for extremely corrosive transfer lines that transport heated raw crude oil or various by-products of the crude oil.
Pickling Bath Heating Coils
These heating coils are important in heating sulfuric, or hydrochloric solutions intended for removing scales from steel.
Uranium Refining and Nuclear Fuel Production
Used in processing equipment where high purity is essential.
Monoethanolamine (MEA) Reboiling Tubes
Used in the heat exchangers that regenerate MEA solutions for carbon dioxide absorption.
Manufacturing of Perchloroethylene and Chlorinated Plastics
Used in reactors and piping systems that handle chlorine and chlorinated compounds.
Frequently Asked Questions
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What makes seamless Monel 400 pipe better than welded pipe?
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Is cold working involved in making Monel 400 seamless pipe?Yes, cold rolling and cold drawing are key steps in the manufacturing process for Monel 400 seamless pipe, which is also the method by which this nickel-copper alloy UNS N04400 is hardened only by cold-working.
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Is Monel 400 pipe resistant to seawater and corrosive chemicals?Yes, the Monel 400 pipe has high resistance to acidic and alkaline environments and exhibits excellent resistance to rapidly flowing brackish water or seawater.
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What is the maximum service temperature for Monel 400 pipe?Monel 400 pipe has a maximum service temperature of 427 °C (800 °F) for stressed and pressure-bearing service. The nickel-copper alloy maintains mechanical strength from −196 °C (−320 °F) up to this limit. Above 427 °C, yield strength and creep resistance decrease sharply.