ASME SB163 UNS N04400 Nickel Alloy Heat Exchanger Tubes
ASME SB163 UNS N04400 Nickel Alloy Heat Exchanger Tubes
ASME SB163 UNS N04400 tubing is a Monel 400 nickel alloy specifically designed for seamless heat exchanger tubing. This alloy is valued for its high strength, excellent corrosion resistance in marine and other environments, good toughness over a wide temperature range, and ease of cold work hardening. Its excellent performance under reducing conditions and resistance to a wide range of salts, alkalis, and water make it an ideal choice for seawater applications, offshore engineering, and high-temperature steam environments.
Is Alloy 400 magnetic?
Alloy 400 offers excellent resistance to fast-moving saltwater or seawater, where cavitation and corrosion resistance are required. It is particularly resistant to degassed hydrochloric and hydrofluoric acids. Alloy 400 is slightly magnetic at room temperature.
ASME SB163 N04400 Nickel Alloy SMLS Heat Exchanger Tube
ASME SB163 UNS N04400 Monel 400 Nickel Alloy Seamless Tube is a high-performance nickel-copper alloy tube manufactured in strict accordance with the international ASME SB163 standard.
Made from the renowned Monel 400 (UNS N04400) alloy, this tube is renowned for its excellent corrosion resistance to seawater, salt spray, sulfuric acid, and hydrofluoric acid.
Utilizing a seamless forming process, this tube boasts seamless welds, uniform microstructure, and strong pressure-bearing capacity, ensuring high reliability and safety in high-pressure, high-temperature, and highly corrosive environments. Therefore, it is widely used in piping systems, heat exchangers, and core equipment components in critical sectors such as offshore engineering, shipbuilding, chemical engineering, and energy.
ASTM B163 UNS N04400 Chemical Composition
| Alloy | Nickel | Copper | Manganese | Iron | Sulfur | Carbon | Silicon | Chromium |
| UNS N04400 | 63.0 min | 28.0 – 34.0 | 2.0 max | 2.5max | 0.024 max | 0.3max | 0.5 | … |
ASTM B163 UNS N04400 Mechanical Properties
| Material and Condition | Tensile Strength Min. Ksi(MPa) | Yield Strength(0.2% Offset)Min,Ksi(MPa) | Elongation in 2in. or 50mm(or 4D)min. % | Rockwell Hardness(or Equivalent) for Annealed Ends[Note(1)] |
| Stress-relieved Alloy UNS N04400: | 85(586) | 55(379) | 15 | B75max |
Key Characteristics
High Strength: Monel 400 (UNS N04400) is known for its high tensile strength, which can be further increased through cold working.
Corrosion Resistance: It offers excellent resistance to a wide range of corrosive environments, including seawater, various salts, and alkalis, and is particularly resistant to chloride-induced stress corrosion cracking.
Wide Temperature Range: The alloy maintains its strength and toughness from subzero to elevated temperatures, making it widely used in heat exchangers.
Mechanical Properties: It is a solid solution alloy that can be strengthened by cold working, improving its surface and dimensional stability.
Chemical Composition: It is a nickel-copper alloy with a high nickel content (63-70%) and a copper content of 20-29%, which imparts its unique properties.
Heat Exchanger Applications
Marine Environments: Its exceptional resistance to seawater and marine conditions makes it an ideal choice for offshore and coastal applications.
Steam Applications: Due to its strength and corrosion resistance, the alloy is suitable for high-temperature steam applications. Corrosive media: It is effective in highly corrosive environments, especially in environments with strong aeration and violent stirring.
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. We also offer customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneesteel.com.
