| Customization: | Available |
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| Application: | Aviation, Electronics, Industrial, Medical, Chemical |
| Standard: | JIS, GB, DIN, BS, ASTM, AISI |
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Inconel 718 is a nickel-based superalloy known for its exceptional strength, corrosion resistance, and high-temperature performance. Here's a detailed description of its key properties:
Composition: Inconel 718 primarily consists of nickel, with significant additions of chromium, iron, niobium, molybdenum, and other alloying elements. These elements contribute to its unique combination of properties.
High Strength: Inconel 718 exhibits outstanding strength at elevated temperatures, making it suitable for use in demanding applications such as aerospace components, gas turbine engines, and industrial gas turbines.
Overall, Inconel 718 is prized for its exceptional mechanical properties, corrosion resistance, and versatility, making it a preferred material for critical components in industries where reliability and performance are paramount.
Corrosion Resistance: The alloy offers excellent resistance to corrosion and oxidation in a wide range of environments, including harsh chemical and high-temperature conditions. This corrosion resistance makes it ideal for applications in the chemical processing, marine, and oil and gas industries.
High-Temperature Performance: Inconel 718 retains its mechanical properties at elevated temperatures up to around 1300°C (2372°F), making it suitable for use in high-temperature applications such as aircraft engine components, exhaust systems, and heat exchangers.
Good Weldability: Despite its high strength and corrosion resistance, Inconel 718 is weldable using conventional welding techniques. This allows for the fabrication of complex structures and assemblies in various industries.
Excellent Fatigue Resistance: Inconel 718 exhibits exceptional fatigue strength, making it well-suited for components subjected to cyclic loading, such as turbine blades, springs, and fasteners.
Versatility: Inconel 718 is a versatile material that can be processed using various manufacturing techniques, including forging, machining, and additive manufacturing (e.g., 3D printing). This versatility expands its range of applications across different industries.
Aerospace Applications: Due to its combination of high strength, corrosion resistance, and high-temperature performance, Inconel 718 is widely used in aerospace applications, including aircraft engine components, rocket thrust chambers, and structural parts.
| 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 718 strips find applications in various industries due to their unique combination of properties. Here are some common applications:
Aerospace Industry: Inconel 718 strips are used in aerospace applications for manufacturing components such as turbine blades, compressor discs, and engine casings. The alloy's high strength, corrosion resistance, and ability to withstand high temperatures make it suitable for these critical aircraft parts.
Gas Turbine Engines: Inconel 718 strips are utilized in gas turbine engines for components like combustion chambers, turbine disks, and high-temperature fasteners. The alloy's excellent mechanical properties and resistance to oxidation and corrosion under high-temperature conditions make it ideal for these demanding applications.
Overall, the versatility, high strength, corrosion resistance, and high-temperature performance of Inconel 718 make it suitable for a wide range of demanding applications across various industries.
Chemical Processing: Inconel 718 strips are employed in chemical processing equipment where resistance to corrosive environments is essential. They are used in reactors, piping, heat exchangers, and valves that handle corrosive chemicals at high temperatures.
Oil and Gas Industry: Inconel 718 strips are used in the oil and gas industry for components subjected to high-pressure, high-temperature conditions, such as downhole equipment, wellhead components, and valves. The alloy's resistance to sulfide stress cracking, corrosion, and erosion make it suitable for these demanding applications.
Nuclear Reactors: Inconel 718 strips are utilized in nuclear reactors for various structural and fuel assembly components due to their high strength, radiation resistance, and corrosion resistance in high-temperature water environments.
Automotive Industry: Inconel 718 strips are sometimes used in high-performance automotive applications, such as turbocharger turbine wheels and exhaust system components, where elevated temperatures and corrosion resistance are critical.
Medical Devices: Inconel 718 strips are employed in medical devices such as implantable components and surgical instruments due to their biocompatibility, strength, and corrosion resistance.
Electronics and Electrical Engineering: Inconel 718 strips are utilized in electronic and electrical applications, such as connectors, springs, and contacts, where high-temperature performance and resistance to thermal cycling are required.
The production process for Inconel 718 strips typically involves several key steps, including melting, casting, hot rolling, cold rolling, heat treatment, and finishing. Here's a detailed description of each step:
Raw Material Selection: High-quality raw materials, including nickel, chromium, iron, and other alloying elements, are carefully selected to meet the specific chemical composition requirements of Inconel 718.
Melting: The selected raw materials are melted in an electric arc furnace or vacuum induction furnace at high temperatures. This process ensures thorough mixing of the alloying elements and the formation of a homogeneous melt.
Throughout the production process, strict quality control measures are implemented to ensure that the Inconel 718 strips meet the required specifications and standards for various industrial applications.
Casting: The molten alloy is poured into molds to form ingots or slabs. The casting process may involve different techniques such as continuous casting or ingot casting, depending on the desired product specifications.
Hot Rolling: The cast ingots or slabs are heated and then passed through a series of rolling mills to reduce their thickness and width. Hot rolling helps shape the material and refine its microstructure, improving its mechanical properties.
Annealing: After hot rolling, the Inconel 718 strips are annealed to relieve internal stresses and ensure uniformity in grain structure. Annealing also enhances the material's mechanical properties and facilitates further processing.
Cold Rolling: The annealed strips are cold rolled to further reduce their thickness and improve surface finish. Cold rolling also increases the material's strength and hardness while maintaining dimensional accuracy.
Heat Treatment: The cold-rolled strips may undergo heat treatment processes such as solution annealing, age hardening, or stress relieving. These heat treatments help optimize the material's mechanical properties, including strength, hardness, and corrosion resistance.
Surface Treatment: Depending on the application requirements, the surface of the Inconel 718 strips may be treated with processes such as pickling, passivation, or coating to improve corrosion resistance and surface finish.
Cutting and Finishing: The processed strips are cut to the desired length and finished to remove any surface imperfections. The finished strips are then inspected for quality and dimensional accuracy.
Packaging: The Inconel 718 strips are packaged according to customer requirements for storage, transportation, and further processing.
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