UNS N04400 pipe, also known as Monel 400 pipe, is a nickel-copper alloy seamless pipe widely used in power applications for its excellent corrosion resistance, strength, and durability. It is a solid solution alloy, which means it can only be hardened by cold working.
Heating should be performed in a sulfur-free, reducing atmosphere. Annealing temperatures range from 700 to 800°F, but 750 to 750°F is most typical. Lower annealing temperatures (e.g., 700 to 750°F) allow for longer annealing times to minimize grain coarsening.
ASTM B165 MONEL 400 Steel Pipe Features
1. Seamless Connection: Monel 400 seamless steel pipe is manufactured using a seamless process, resulting in a continuous, smooth pipe wall, effectively reducing pipe resistance losses and improving transmission efficiency.
2. High-Quality Material: Made from high-quality materials, Monel 400 seamless steel pipe offers excellent mechanical properties and corrosion resistance, meeting the demands of a variety of demanding applications.
3. Long Service Life: Due to its excellent corrosion resistance and mechanical properties, Monel 400 seamless steel pipe offers a longer service life than ordinary steel pipe, saving businesses significant maintenance and replacement costs.
4. Wide Application: Monel 400 seamless steel pipe is widely used in the petroleum, chemical, power, marine, aerospace, and other industries.
Power Applications
UNS N04400 seamless pipe is used in the power generation industry, where corrosion resistance and high strength are crucial. Specific applications include:
Feedwater and Steam Generators: Ideal for transporting high-temperature steam and water in power plants. Heat Exchangers: Its excellent thermal conductivity makes it an effective material for heat exchangers, including boiler feedwater heaters.
Condensers: Due to its excellent resistance to seawater corrosion, it is often used in condensers, especially in marine environments.
Desalination Plants: Used in brine heaters and evaporator bodies.
Nuclear Power Industry: Due to its resistance to corrosive environments and radiation, it is used in nuclear reactor internal components and nuclear fuel handling equipment.
Chemical Composition of ASTM B165 Monel 400 Steel Pipe
| Grade | C | Mn | Si | S | Cu | Fe | Ni | Cr |
| Monel 400 | 0.30 max | 2.00 max | 0.50 max | 0.24max | 28.0-34.0 | 2.50 max | 63.00 min |
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Mechanical Properties of ASTM B165 Monel 400 Steel Pipe
| Condition & Size | Tensile Strength, min. ksi [MPa] |
Yield Strength, min. ksi [MPa] |
Elongation, min. % |
|---|---|---|---|
| *A | 70 [480] | 28 [195] | 35 |
| *B | 70 [480] | 25 [170] | 35 |
| *C | 85 [585] | 55 [380] | 15 |
Specification List of Monel 400 Tube
| Thickness | 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Outer Diameter | 6.00 mm OD up to 914.4 mm OD, Sizes up to 24" NB |
| Type | Seamless / ERW / Welded / Fabricated / CDW |
| Form | Round Tubes, Square Tubes, Rectangular Tubes, Coiled Tubes, "U" Shape, Pan Cake Coils, Hydraulic Tubes |
| Length | Single Random, Double Random & Required Length |
| End | Plain End, Beveled End, Treaded. |
Gnee Steel specializes in the production and sale of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. Gnee Steel's products are widely used in aerospace, chemical, electric power, automotive, and nuclear energy applications, and we can provide customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneemetal.com.
