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INCONEL® 718
1. Exceptional High-Temperature Performance
INCONEL 718 retains its mechanical strength and stability in high-temperature environments, with excellent creep and fatigue resistance at temperatures up to 1300°F (700°C). This property makes it a perfect choice for applications in gas turbines and jet engines, where high temperatures can cause material degradation.
2. Excellent Corrosion and Oxidation Resistance
The alloy's superior resistance to oxidation and corrosion, especially at high temperatures, ensures prolonged service life even in aggressive environments. This makes it ideal for the chemical processing industry and other applications requiring protection against harsh environmental conditions. The material is particularly resistant to pitting and stress corrosion cracking.
3. Strong Fatigue and Stress Resistance
INCONEL 718 is known for its outstanding resistance to both fatigue and stress corrosion cracking, making it suitable for use in dynamic environments with repeated loads and vibrations. This feature ensures durability and reliability, even in components subjected to high stress, such as turbine blades and other critical engine parts.
4. Weldability and Formability
Despite its high strength, INCONEL 718 is easy to weld and form, offering versatility in fabrication. It can be processed using common welding techniques such as gas tungsten arc welding (GTAW) and electron beam welding (EBW), ensuring high-quality results in a wide range of fabrication applications.
5. Excellent Stability in Harsh Environments
The alloy maintains exceptional stability and mechanical properties even in the presence of highly corrosive environments such as sulfur compounds, chlorides, and seawater. It is particularly effective in applications in the nuclear power and marine industries, where materials are subjected to aggressive chemical exposure.
Chemical Composition, %
Ni | Fe | Cr | Cu | Mo | Nb | C | Mn |
50.00-55.00 | Remainder | 17.00-21.00 | .30 max | 2.80-3.30 | 4.75-5.50 | .08 max | .35 max |
P | S | Si | Ti | Al | Co | B |
.015 max | .015 max | .35 max | .65-1.15 | .20-.80 | 1.00 max | .006 max |
1. Exceptional High-Temperature Performance
INCONEL 718 retains its mechanical strength and stability in high-temperature environments, with excellent creep and fatigue resistance at temperatures up to 1300°F (700°C). This property makes it a perfect choice for applications in gas turbines and jet engines, where high temperatures can cause material degradation.
2. Excellent Corrosion and Oxidation Resistance
The alloy's superior resistance to oxidation and corrosion, especially at high temperatures, ensures prolonged service life even in aggressive environments. This makes it ideal for the chemical processing industry and other applications requiring protection against harsh environmental conditions. The material is particularly resistant to pitting and stress corrosion cracking.
3. Strong Fatigue and Stress Resistance
INCONEL 718 is known for its outstanding resistance to both fatigue and stress corrosion cracking, making it suitable for use in dynamic environments with repeated loads and vibrations. This feature ensures durability and reliability, even in components subjected to high stress, such as turbine blades and other critical engine parts.
4. Weldability and Formability
Despite its high strength, INCONEL 718 is easy to weld and form, offering versatility in fabrication. It can be processed using common welding techniques such as gas tungsten arc welding (GTAW) and electron beam welding (EBW), ensuring high-quality results in a wide range of fabrication applications.
5. Excellent Stability in Harsh Environments
The alloy maintains exceptional stability and mechanical properties even in the presence of highly corrosive environments such as sulfur compounds, chlorides, and seawater. It is particularly effective in applications in the nuclear power and marine industries, where materials are subjected to aggressive chemical exposure.
1. Aerospace Components
INCONEL 718 is widely used in the aerospace industry for turbine blades, rings, and other high-temperature engine components. Its ability to withstand extreme heat and thermal cycling makes it ideal for jet engines, where materials are exposed to both high temperatures and high pressures. Unlike conventional alloys, INCONEL 718's high strength-to-weight ratio allows for better fuel efficiency and overall engine performance.
2. Nuclear Power Industry
In nuclear power plants, INCONEL 718 is used for various applications, including reactor core components and fuel element supports. Its resistance to radiation-induced aging and its high strength at elevated temperatures ensure its reliability and longevity in these critical environments.
3. Marine Industry
Due to its corrosion resistance, INCONEL 718 is commonly used in the marine industry for components exposed to seawater. Its high resistance to saltwater corrosion ensures that parts such as shafts, seals, and heat exchangers last longer, reducing the need for frequent maintenance and replacements.
4. Chemical Processing Equipment
INCONEL 718 is frequently used in chemical processing industries for equipment exposed to high temperatures and corrosive chemicals. Its excellent oxidation resistance and durability in aggressive environments ensure long-lasting, reliable performance in pumps, reactors, and heat exchangers.
5. Automotive Applications
The high strength and corrosion resistance of INCONEL 718 make it an excellent choice for automotive applications, particularly in exhaust systems and turbochargers. The alloy’s performance in high-heat environments helps maintain the integrity of critical engine components under extreme conditions.
Q: What forms is INCONEL 718 available in?
INCONEL 718 is available in several forms, including sheet, plate, bar, wire, and tube, offering versatility to meet the requirements of various industrial applications.
Q: Can INCONEL 718 be welded?
Yes, INCONEL 718 can be welded using standard welding techniques such as gas tungsten arc welding (GTAW) and electron beam welding (EBW), ensuring high-quality results with minimal defects.
Q: Is INCONEL 718 resistant to oxidation and corrosion?
Yes, INCONEL 718 offers excellent resistance to oxidation and corrosion, making it ideal for use in high-temperature and corrosive environments such as aerospace, chemical processing, and marine industries.
Q: What industries typically use INCONEL 718?
INCONEL 718 is commonly used in aerospace, nuclear power, marine, chemical processing, and automotive industries, thanks to its high temperature, corrosion, and fatigue resistance.
Q: How does INCONEL 718 compare to other super alloys?
Compared to other super alloys, INCONEL 718 provides superior high-temperature performance, excellent fatigue resistance, and outstanding oxidation and corrosion resistance, making it one of the most versatile and reliable materials for demanding applications.