| Customization: | Available |
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| Application: | Aviation, Electronics, Industrial, Medical, Chemical |
| Standard: | JIS, GB, DIN, BS, ASTM, AISI |
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Inconel 825 tubes are cylindrical hollow structures made from a nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. These tubes offer exceptional resistance to corrosion in various harsh environments, including those containing sulfuric and phosphoric acids, as well as oxidizing and reducing acids. Inconel 825 tubes exhibit excellent resistance to stress-corrosion cracking, pitting, and crevice corrosion, making them suitable for use in corrosive chemical processing industries, pollution control systems, and marine environments.
The unique composition of Inconel 825 tubes provides excellent mechanical properties at both ambient and elevated temperatures, making them ideal for applications requiring high strength and durability in aggressive environments. They maintain their integrity and performance even in highly corrosive conditions, such as those found in chemical processing plants, oil and gas facilities, power generation plants, and marine applications.
Inconel 825 tubes are available in various sizes, thicknesses, and lengths to suit different application requirements. They can be seamless or welded, depending on the manufacturing process used. Additionally, these tubes can be customized with specific surface finishes, coatings, or treatments to further enhance their corrosion resistance, durability, and performance in demanding operating conditions.
Overall, Inconel 825 tubes are valued for their exceptional corrosion resistance, mechanical strength, and reliability, making them indispensable in industries where resistance to harsh chemicals and environments is essential for long-term performance and safety.
| Item | Inconel 600 | Inconel | Inconel 617 | Inconel | Inconel | Inconel | Inconel | Inconel |
| 601 | 625 | 690 | 718 | X750 | 825 | |||
| C | ≤0.15 | ≤0.1 | 0.05-0.15 | ≤0.08 | ≤0.05 | ≤0.08 | ≤0.08 | ≤0.05 |
| Mn | ≤1 | ≤1.5 | ≤0.5 | ≤0.35 | ≤0.5 | ≤0.35 | ≤1 | ≤1 |
| Fe | 6~10 | rest | ≤3 | rest | 7~11 | rest | 5~9 | ≥22 |
| P | ≤0.015 | ≤0.02 | ≤0.015 | -- | -- | -- | -- | -- |
| S | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.01 | ≤0.01 | ≤0.03 |
| Si | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.35 | ≤0.5 | ≤0.35 | ≤0.5 | ≤0.5 |
| Cu | ≤0.5 | ≤1 | -- | ≤0.3 | ≤0.5 | ≤0.3 | ≤0.5 | 1.5-3 |
| Ni | ≥72 | 58-63 | ≥44.5 | 50-55 | ≥58 | 50-55 | ≥70 | 38-46 |
| Co | -- | -- | 10~15 | ≤10 | -- | ≤1 | ≤1 | -- |
| Al | -- | 1-1.7 | 0.8-1.5 | ≤0.8 | -- | 0.2-0.8 | 0.4-1 | ≤0.2 |
| Ti | -- | -- | ≤0.6 | ≤1.15 | -- | -- | 2.25-2.75 | 0.6-1.2 |
| Cr | 14-17 | 21-25 | 20-24 | 17-21 | 27-31 | 17-21 | 14-17 | 19.5-23.5 |
| Nb+Ta | -- | -- | -- | 4.75-5.5 | -- | 4.75-5.5 | 0.7-1.2 | -- |
| Mo | -- | -- | 8~10 | 2.8-3.3 | -- | 2.8-3.3 | -- | 2.5-3.5 |
| B | -- | -- | ≤0.006 | -- | -- | -- | -- | -- |
Inconel 825 tubes find application in a wide range of industries and environments where resistance to corrosion, high temperatures, and mechanical stress is essential. Some common applications include:
Chemical Processing: Inconel 825 tubes are used in chemical processing plants for handling corrosive acids, such as sulfuric acid, phosphoric acid, and hydrochloric acid. They are employed in reactors, heat exchangers, piping systems, and other equipment where resistance to chemical corrosion is critical.
Oil and Gas Industry: These tubes are utilized in offshore and onshore oil and gas production facilities for tubing, piping, and downhole applications. They offer excellent resistance to corrosion in sour gas environments containing hydrogen sulfide (H2S) and carbon dioxide (CO2), as well as resistance to chloride-induced stress corrosion cracking (SCC).
Power Generation: Inconel 825 tubes are used in boilers, heat exchangers, and other equipment in power plants where resistance to high temperatures, steam, and corrosive gases is required. They are particularly suitable for applications involving flue gas desulfurization (FGD) systems, which handle sulfur-containing gases.
Pollution Control: These tubes are employed in pollution control systems, such as scrubbers, stack liners, and exhaust systems, where they offer resistance to acidic gases, particulate matter, and corrosive chemicals emitted during industrial processes.
Marine Applications: Inconel 825 tubes are used in marine environments for seawater piping systems, heat exchangers, and desalination plants. They exhibit excellent resistance to corrosion, pitting, and crevice corrosion in saltwater environments.
Aerospace and Aviation: These tubes find application in aircraft components exposed to high temperatures, corrosive environments, and mechanical stress. They are used in exhaust systems, turbine engine components, and aircraft fuel systems.
Pharmaceutical Industry: Inconel 825 tubes are employed in the pharmaceutical industry for handling corrosive chemicals and high-purity processes. They are used in equipment such as reactors, storage vessels, and piping systems.
Nuclear Industry: These tubes are used in nuclear fuel reprocessing plants and other nuclear facilities where resistance to corrosive chemicals, such as, is essential for safety and reliability.
Overall, Inconel 825 tubes are valued for their exceptional corrosion resistance, mechanical strength, and reliability in demanding environments, making them indispensable in various industries where corrosion protection is critical for equipment longevity and operational safety.
The production process for Inconel 825 tubes typically involves several steps:
Raw Material Preparation: The process begins with the selection of high-quality raw materials, including nickel, chromium, iron, and molybdenum, among other alloying elements. These materials are carefully measured and combined in precise proportions to achieve the desired composition for Inconel 825.
Melting and Alloying: The raw materials are melted together in a vacuum induction furnace or an electric arc furnace at temperatures exceeding 2500°F (1370°C). During melting, alloying elements may be added to adjust the composition and enhance the properties of the alloy.
Casting or Forming: Once the alloy is molten and properly alloyed, it is cast into ingots or billets using various casting techniques such as continuous casting or pouring into molds. Alternatively, the molten alloy can be formed into tubes directly through processes like centrifugal casting or extrusion.
Tube Forming: The cast or formed ingots/billets are then processed through hot or cold working techniques to form them into tube shapes. Hot working involves heating the material to high temperatures and then shaping it through processes like rolling or forging. Cold working, on the other hand, involves forming the material at room temperature or slightly elevated temperatures using techniques such as cold rolling or cold drawing.
Heat Treatment: After forming, the tubes may undergo heat treatment processes to optimize their mechanical properties, enhance their corrosion resistance, and relieve any residual stresses introduced during forming. Common heat treatment processes for Inconel 825 tubes include annealing, solution annealing, and stress relieving.
Finishing Operations: Once the tubes are formed and heat treated, they undergo various finishing operations to achieve the desired dimensions, surface finish, and mechanical properties. These operations may include straightening, cutting, machining, polishing, and non-destructive testing (NDT) to ensure quality and dimensional accuracy.
Quality Control: Throughout the production process, rigorous quality control measures are implemented to ensure that the Inconel 825 tubes meet the required specifications and standards. This includes inspection of raw materials, in-process inspections, and final product testing for dimensional accuracy, mechanical properties, and corrosion resistance.
Packaging and Shipping: Finally, the finished tubes are packaged according to customer requirements and shipped to end-users or distributors for use in various applications.
Overall, the production process for Inconel 825 tubes is complex and involves several steps to ensure the desired material properties, dimensional accuracy, and quality standards are met for the intended application.
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