What is lnconel
Inconel is a family of austenitic nickel-chromium-based superalloys, which are known for their high corrosion resistance, oxidation resistance, and strength at high temperatures.
These alloys typically contain 15-25% chromium, 7-15% iron, up to 1% carbon, and other alloying elements such as copper, manganese, niobium, molybdenum, and titanium, depending on the specific alloy.
Inconel alloys are used in a wide range of applications where high-temperature strength and corrosion resistance are required, such as:
- Gas turbine components
- Industrial heating equipment
- Chemical processing equipment
- Marine engineering
- Oil and gas exploration and refining
- Aerospace and aeronautical components
Common Inconel Alloy Grades & Chemical Compositions
The following is an introduction to the comprehensive characteristics of Inconel alloys:
- Corrosion resistance: Inconel alloys have excellent corrosion resistance, especially in environments such as oxidizing media, organic acids, inorganic acids and seawater. This makes them suitable for use in fields such as chemical, petrochemical, marine engineering and pollution control equipment.
- High temperature resistance: These alloys are able to maintain stable mechanical properties in extremely high temperature environments and are suitable for high temperature applications such as aircraft engines, industrial furnaces, and gas turbines.
- High strength: Inconel alloys have high strength even at high temperatures, which makes them important in aerospace, energy industry and other fields.
- Good welding performance: Although the welding performance of Inconel alloys is relatively poor, high-quality welding can be achieved by using special welding processes and filler materials.
- Excellent formability: Inconel alloys have good cold and hot formability and can be processed by rolling, forging, extrusion and other processes.
- Resistance to stress corrosion cracking: Some Inconel alloys have high resistance to stress corrosion cracking and are suitable for environments where this may occur.
Here are several commonly used Inconel alloys:
- Inconel 600
Characteristics: It exhibits excellent high-temperature corrosion and oxidation resistance. It also has good cold and hot working as well as welding properties. It shows satisfactory high-temperature strength and high plasticity at temperatures below 700°C.
Application Areas: It is widely used in fields such as petrochemical industry, nuclear reactors, heat treatment furnaces, and aero engines. - Inconel 601
Characteristics: At high temperatures, it has outstanding oxidation and carburization resistance. It also features good resistance to stress corrosion cracking and is suitable for applications above 500°C.
Application Areas: It is used in items like trays in heat treatment factories, annealing equipment for steel wire, partition tanks in ammonia reforming, and combustion chambers in solid waste incinerators. - Inconel 617
Characteristics: It has excellent mechanical properties at high temperatures, along with good oxidation and carburization resistance. It is suitable for situations with high temperatures and relatively high mechanical stresses.
Application Areas: It is extensively applied in industrial and aero turbine components, air heaters, muffles, high-temperature heat exchangers, and high-temperature parts of nuclear reactors. - Inconel 625
Characteristics: It has high strength, good oxidation and corrosion resistance, making it suitable for high-temperature and high-pressure environments.
Application Areas: It is widely used in aerospace, marine engineering, chemical processing equipment, and the nuclear industry. It is used to manufacture components such as gas turbine blades, combustion chambers, seawater heat exchangers, and nuclear reactor structural parts. - Inconel 690
Characteristics: It has excellent corrosion resistance and high-temperature oxidation resistance, especially suitable for use in high-temperature and corrosive environments.
Application Areas: It is widely used in nuclear power plants, chemical equipment, and industrial heating equipment. It is used to make components such as steam generator pipes, high-temperature furnace parts, and heat treatment molds.
lnconel | |||||
Major Constituent Elements | lnconel Grades | ||||
600 | 601 | 617 | 625 | 690 | |
Ni: ≥72% | Ni: ≥58% | Ni: ≥50% | Ni: ≥58% | Ni: ≥58% | |
Cr: 14.0 – 17.0% | Cr: 21.0 – 25.0% | Cr: 20.0 – 22.0% | Cr: 20.0 – 23.0% | Cr: 27.0 – 31.0% | |
Fe: 6.0 – 10.0% | Fe: 8.0 – 11.0% | Co: 10.0 – 15.0% | Mo: 8.0 – 10.0% | Fe: 18.0 – 25.0% | |
Cu: ≤0.5% | Al: ≤1.0% | Mo: 8.0 – 10.0% | Fe: ≤5.0% | C : ≤0.05% | |
Mn: ≤1.0% | Ti: ≤0.6% | Al: ≤1.2% | Al: ≤0.4% | Mn: ≤1.0% | |
Si: ≤0.5% | C: ≤0.10% | Ti: ≤0.6% | Ti: ≤0.4% | Si: ≤0.5% | |
C : ≤0.15% | C : ≤0.08% | C : ≤0.10% | P : ≤0.015% | ||
S : ≤0.015% |
Inconel 600
Inconel 601
Inconel 617
Inconel 625
Inconel 690
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