| Customization: | Available |
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| Application: | Aviation, Electronics, Industrial, Medical, Chemical |
| Standard: | JIS, GB, DIN, BS, ASTM, AISI |
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Inconel 690 is a high-chromium nickel alloy known for its excellent resistance to corrosion, particularly in high-temperature environments. When produced in strip form, Inconel 690 strip typically exhibits the following characteristics:
Composition: Inconel 690 strip is primarily composed of nickel (Ni) with significant additions of chromium (Cr), iron (Fe), and other alloying elements such as molybdenum (Mo) and niobium (Nb). The exact composition may vary slightly depending on the specific requirements of the application.
High Temperature Resistance: Inconel 690 strip is designed to withstand high temperatures and thermal cycling without significant degradation in performance. It retains its mechanical strength and corrosion resistance at elevated temperatures, making it suitable for use in applications such as heat exchangers, furnace components, and chemical processing equipment.
Overall, Inconel 690 strip is a versatile material known for its exceptional corrosion resistance, high temperature stability, and excellent mechanical properties, making it suitable for a wide range of demanding industrial applications, particularly in harsh environments.
Corrosion Resistance: The high chromium content in Inconel 690 provides exceptional resistance to oxidation, sulfidation, and carburization in aggressive environments, including oxidizing and reducing conditions. This corrosion resistance makes it suitable for use in environments containing sulfuric acid, , hydrochloric acid, and other corrosive chemicals.
Excellent Mechanical Properties: Inconel 690 strip exhibits good mechanical properties, including high tensile strength, excellent creep resistance, and good ductility. These properties make it capable of withstanding mechanical stresses and strains encountered in various industrial applications.
Formability and Machinability: Inconel 690 strip can be easily formed and fabricated using conventional methods such as cold rolling, hot rolling, and annealing. Its excellent formability allows for the production of custom shapes and sizes to meet specific application requirements. However, due to its high strength and work-hardening tendency, machining of Inconel 690 strip may be challenging and requires appropriate tooling and cutting parameters.
Surface Finish: Inconel 690 strip typically has a smooth surface finish, free from defects such as cracks, pits, or surface irregularities. This ensures consistent performance and ease of handling during fabrication and assembly processes.
| Ni | Cr | Fe | C | Al | Ti | Mn | Si | Cu | P | S |
| 59.899 | 30.39 | 8.88 | 0.023 | 0.22 | 0.26 | 0.23 | 0.07 | 0.02 | 0.006 | 0.002 |
| Denisity | Melting | Poisson's Ratio | Yield Strength | Tensile Strength | Elongation |
| 8.19 g/cm3 | 1343-1377 | 0.289 | 350 MPa | 700 MPa | 45% |
Inconel 690 strip finds application in various industries where high-temperature corrosion resistance and mechanical strength are required. Some common applications include:
Heat Exchangers: Inconel 690 strip is used in the fabrication of heat exchanger components such as tubes, tube sheets, and headers. Its resistance to oxidation and corrosion, even at elevated temperatures, makes it suitable for handling corrosive fluids and gases in heat transfer processes.
Furnace Components: The high-temperature stability and oxidation resistance of Inconel 690 make it ideal for use in furnace components such as radiant tubes, muffles, and burner assemblies. It can withstand the harsh conditions inside furnaces, including high temperatures, thermal cycling, and exposure to combustion gases.
These are just a few examples of the diverse applications of Inconel 690 strip across various industries where its unique combination of properties makes it an ideal choice for demanding operating conditions.
Chemical Processing Equipment: Inconel 690 strip is employed in the construction of chemical processing equipment such as reactors, vessels, and piping systems. Its resistance to corrosion by acids, alkalis, and other corrosive chemicals makes it well-suited for handling aggressive process fluids in chemical manufacturing plants.
Power Generation: Inconel 690 is used in power generation facilities for applications such as steam turbinecomponents, boiler tubes, and exhaust systems. Its ability to withstand high temperatures and corrosive environments makes it valuable for ensuring the reliability and longevity of power generation equipment.
Aerospace and Defense: Inconel 690 strip may be utilized in aerospace and defense applications where corrosion resistance and high temperature performance are critical. It can be found in components such as engine exhaust systems, thrust reversers, and combustion chambers.
Petrochemical Industry: Inconel 690 is used in the petrochemical industry for applications such as refining equipment, including reactors, heat exchangers, and piping systems. Its resistance to sulfidation and carburization makes it suitable for handling hydrocarbons and other corrosive substances in refining processes.
Nuclear Industry: Inconel 690 strip may be employed in nuclear power plants for applications such as steam generator tubing and reactor core components. Its resistance to corrosion and radiation damage makes it suitable for use in nuclear reactor environments.
The production process of Inconel 690 strip typically involves several stages:
Melting: The process begins with the melting of high-purity nickel, chromium, and other alloying elements in an electric arc furnace or a vacuum induction furnace. The precise composition of the alloy is crucial to ensure that the final product meets the required specifications for strength, corrosion resistance, and other properties.
Casting: Once the alloy is molten and homogenized, it is cast into large ingots or slabs using continuous casting or other casting methods. This step helps to form the initial shape of the material before further processing.
Throughout the production process, strict quality control measures are implemented to ensure that the final product meets the highest standards for performance and reliability in its intended applications.
Hot Rolling: The cast ingots or slabs are heated to high temperatures and then passed through a series of rolling mills to reduce their thickness and increase their length. This process, known as hot rolling, typically involves multiple passes through rollers at increasingly tighter gaps to achieve the desired dimensions and mechanical properties.
Cold Rolling: After hot rolling, the material is typically annealed to relieve internal stresses and improve its ductility. It is then cold rolled to further reduce its thickness and improve its surface finish. Cold rolling also increases the strength and hardness of the material, making it suitable for demanding applications.
Annealing: Throughout the rolling process, the material may undergo intermediate annealing treatments to optimize its microstructure and mechanical properties. Annealing involves heating the material to elevated temperatures and then slowly cooling it to promote grain growth and relieve residual stresses.
Final Inspection and Testing: Once the strip reaches its final thickness and dimensions, it undergoes thorough inspection and testing to ensure that it meets the required specifications for composition, mechanical properties, and surface finish. This may include visual inspection, dimensional measurements, non-destructive testing, and mechanical testing.
Finishing: Finally, the strip may undergo additional finishing processes such as pickling, passivation, or surface treatments to remove any surface contaminants and improve its corrosion resistance or appearance.
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