Incoloy 840 alloy is a high-temperature alloy containing elements of nickel, chromium, copper, and iron with excellent corrosion resistance and high-temperature strength. In this article, the definition, chemical composition, production standards, corrosion resistance, typical application range, processing and heat treatment, machining, welding, recommended welding materials, and the range of products available for Incoloy 840 alloy is described in detail.
I. Definition and chemical composition of Incoloy 840 alloy.
Incoloy 840 alloy is a high-temperature alloy containing elements such as nickel, chromium, copper and iron. Its chemical composition is as follows:
- Nickel (Ni): 57-59%
-Chromium (Cr): 18-21%
- Copper (Cu): 1.5-3%
- Iron (Fe): the balance
- Carbon (C): 0.05 per cent
- Phosphorus (P): 0.015 per cent
- Sulfur (S): 0.015%
Ⅱ, Incoloy 840 alloy production standards.
The production standards for Incoloy 840 alloy include the American standards AMS 5774 and AMS 5837, and the European standard EN 2.4856, which specify the chemical composition, mechanical properties, heat treatment and machining requirements of Incoloy 840 alloy to ensure that it has excellent performance at high temperatures and in corrosive environments.
III. Corrosion resistance of Incoloy 840 alloy.
Incoloy 840 alloy has excellent corrosion resistance, including resistance to oxidation, vulcanisation and alkali corrosion. Its main corrosion resistance properties are as follows:
1. oxidation resistance: Incoloy 840 alloy has excellent corrosion resistance in high temperature oxidation environment, able to resist oxidation and high temperature corrosion.
2. Sulphide resistance: Incoloy 840 alloy has good corrosion resistance in the presence of hydrogen sulphide and other sulphides at high temperatures and can resist hydrogen sulphide corrosion.
3. Alkaline corrosion resistance: Incoloy 840 alloy has good corrosion resistance under high temperature alkaline environment and can resist corrosion of alkaline media such as sodium hydroxide and potassium hydroxide.
Typical applications of Incoloy 840 alloy.
Incoloy 840 alloy has excellent high temperature strength and corrosion resistance, suitable for a variety of high temperature and corrosive environment applications. Its typical application range includes:
1. Petrochemical industry: Incoloy 840 alloy is commonly used in high-temperature equipment and piping in areas such as oil refining, chemical and natural gas processing.
2. Power industry: Incoloy 840 alloy is used in high-temperature equipment and piping in thermal and nuclear power plants.
3. food processing: Incoloy 840 alloy can be used in high temperature heat treatment equipment and pipelines, such as hot water heat treatment equipment and steam pipelines.
4. Aerospace: Incoloy 840 alloy can be used in high temperature components such as aircraft engines and gas turbines.
5. Chemical industry: Incoloy 840 alloy can be used in chemical reactors, steam generators and catalysts and other high temperature equipment.
V. Processing and heat treatment of Incoloy 840 alloy.
Incoloy 840 alloy has high thermoplasticity and hot working performance, can be obtained through hot processing and heat treatment of excellent high temperature strength and corrosion resistance. The processing and heat treatment methods are as follows:
1. Thermal Processing.
Incoloy 840 alloy can be prepared by hot rolling, hot extrusion, hot forging and other hot working methods for various profiles and parts. When hot working, attention should be paid to controlling the processing temperature and deformation amount to avoid excessive deformation and cracks and other problems.
2. Cold working.
Incoloy 840 alloy can be cold drawn, cold drawn and cold rolled and other cold working methods to prepare a variety of profiles and parts. When cold working, attention should be paid to controlling the processing volume and processing speed to avoid excessive deformation and cracks and other problems.
3. Heat Treatment.
Incoloy 840 alloy can obtain excellent high-temperature strength and corrosion resistance through heat treatment methods such as solid solution and aging. When heat treatment is carried out, attention should be paid to controlling the heating rate and holding time to avoid problems such as excessive deformation and deterioration.
Machining of Incoloy 840 alloy.
Incoloy 840 alloy machining is difficult, generally using carbide tools for cutting. When machining, attention should be paid to controlling the machining speed and tool feed to avoid excessive wear and tool fracture and other problems. In addition, suitable coolant and cutting fluid should be used to reduce friction and heat to avoid excessive thermal stress and deformation and other problems.
VII.Welding of Incoloy 840 alloy.
Incoloy 840 alloy is easy to weld, can be used TIG, MIG and arc welding methods. When welding, attention should be paid to controlling the welding temperature and welding speed to avoid excessive heat and thermal stress, to avoid porosity and cracks and other problems. Recommended welding materials include Inconel 82 wire and Hastelloy C-276 wire and so on.
Eight, Incoloy 840 alloy recommended welding materials.
Incoloy 840 alloy recommended welding materials include Inconel 82 wire and Hastelloy C-276 wire and so on. These wires have good welding performance and corrosion resistance, can meet the welding needs of Incoloy 840 alloy.
IX. Range of products available for Incoloy 840 alloy.
Incoloy 840 alloy is available in a wide range of products, including pipes, plates, rods, wires, flanges and so on. Among them, pipes and plates are the most widely used products, commonly used in petrochemical, power industry, aerospace, chemical engineering and food processing.
In summary, Incoloy 840 alloy is an alloy material with excellent high-temperature strength and corrosion resistance for a variety of applications in high-temperature and corrosive environments. Its typical applications cover areas such as petrochemicals, power industry, aerospace, chemical engineering and food processing. During machining and heat treatment, care should be taken to control the process parameters to ensure the uniformity and stability of the alloy. During machining and welding, care should be taken to reduce friction and heat, and to avoid excessive heat and stress to minimise problems such as deformation and cracking of the alloy. Recommended welding materials include Inconel 82 wire and Hastelloy C-276 wire, among others. The range of products available includes pipes, plates, rods, wires, flanges, etc. The good properties and wide range of applications of Incoloy 840 alloy provide favourable conditions for its use in industry.
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Post time: Jul-22-2023
