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Incoloy 825 (UNS N08825 / W.Nr.2.4858 ) super alloy Good oxidation resistance and non-oxidation thermal acidity
General Overview:
Incoloy 825 is valued for its combination of corrosion resistance, high-temperature strength, and fabricability. It is often used in chemical processing, marine, and offshore applications where resistance to both corrosion and heat is required.
Incoloy 825 has excellent resistance to a wide range of corrosive environments, including acidic and alkaline solutions, and is particularly resistant to pitting and crevice corrosion. The alloy exhibits good resistance to high-temperature oxidation, making it suitable for use in high-temperature applications. It has good weldability, maintaining its corrosion resistance after welding. Incoloy 825 has good thermal conductivity, which is beneficial for applications involving heat transfer.
Chemical Processing: Used in chemical processing equipment, heat exchangers, and pipelines for its resistance to corrosive chemicals.
Marine and Offshore: Employed in marine and offshore applications for its ability to withstand seawater corrosion.
Power Generation: Utilized in components of power plants, such as steam generators and heat recovery systems, due to its resistance to high-temperature steam and water environments.
Gas Turbines: Used in gas turbine components for power generation, where high-temperature strength and resistance to corrosive gases are required.
Petrochemical Industry: Used in the construction of equipment that processes and stores chemicals and petrochemicals.
Incoloy 825 alloy's combination of corrosion resistance, high-temperature strength, and good fabricability makes it a popular choice for demanding applications where performance under extreme conditions is critical. Its use in the chemical, marine, offshore, and petrochemical industries underscores its reliability and versatility.
Chemical Composition Wt.% | % | Ni | Cr | Fe | C | Mn | Si | Cu | Mo | Al | Ti | P | S |
Min | 38 | 19.5 | Bal. | 1.5 | 2.5 | 0.6 | |||||||
Max | 46 | 23.5 | Bal. | 0.05 | 1.0 | 0.5 | 3.0 | 3.5 | 0.2 | 1.2 | 0.02 | 0.03 |
Physical Constants | Density(g/cm³) | 8.1 | |||||
Melting Range(℃) |
1370-1400 |
Minimum mechanical properties of alloy at room temperature | Typical mechanical properties | Tensile strength Rm N/mm² | Yield strength RP 0.2 N/mm² | Elongation A5 % | Brinell Hardness HB | |||||
Solution treatment | 550 | 250 | 35 | ≤200 |