Inconel 718

Key characteristics of Inconel 625 include:

1. High Temperature Strength: Inconel 718 maintains its mechanical properties at high temperatures, making it suitable for use in applications involving extreme heat. It has good tensile, fatigue, and creep-rupture strength at elevated temperatures.
2. Corrosion Resistance: The alloy exhibits excellent corrosion resistance in a variety of environments, including aqueous corrosion, pitting, and crevice corrosion. This corrosion resistance makes it suitable for use in harsh and corrosive chemical environments.
3. High Yield and Tensile Strength: Inconel 718 has high yield and tensile strengths, making it capable of withstanding significant mechanical loads. This property is particularly important in applications where strength and reliability are critical.
4. Good Fatigue Resistance: The alloy has good fatigue resistance, making it suitable for applications involving cyclic loading, such as turbine engine components.
5. Weldability: Inconel 718 is weldable using common welding techniques. However, post-weld heat treatment is often required to restore the material’s properties and eliminate any potential welding-induced issues.
6. Excellent Formability: The alloy is known for its good formability, allowing it to be easily fabricated into various shapes. This property is advantageous in manufacturing processes.
7. Gamma Prime Strengthening: Inconel 718 gains its high strength through a precipitation-hardening process involving the formation of a gamma prime phase (Ni3Nb) within the alloy matrix. This contributes to the material’s high-temperature strength.
8. Oxidation Resistance: The alloy exhibits good oxidation resistance at high temperatures, which is crucial for applications in environments with elevated heat.
9. Machinability: Inconel 718 can be machined, but due to its high strength and work-hardening characteristics, machining may be challenging. Proper tools and machining techniques are essential for achieving desired results.
10. Applications: Common applications for Inconel 718 include components in gas turbines, aircraft engines, nuclear reactors, chemical processing equipment, and other high-temperature and corrosive environments.