1. What is the chemical composition of Inconel 617?
Answer:
Inconel 617 is a nickel-chromium-cobalt-molybdenum alloy. Typical composition:
Nickel (Ni): balance (~50–55%)
Chromium (Cr): 20–22%
Cobalt (Co): 11–13%
Molybdenum (Mo): 8–10%
Iron (Fe): ≤2.5%
Minor elements: Carbon, Manganese, Silicon, Titanium, Aluminum in trace amounts
This composition provides excellent high-temperature strength and oxidation resistance.
2. What are the key mechanical properties of Inconel 617 plate?
Answer:
At room temperature:
Tensile Strength: ~690–830 MPa
Yield Strength: ~275–415 MPa
Elongation: ~30–50%
Hardness: ~HRB 95–100
It maintains high strength and creep resistance at temperatures up to 980–1090°C (1800–2000°F).
3. What are the main applications of Inconel 617 plates?
Answer:
Gas turbine components, such as combustion chambers and turbine blades
Heat exchangers for high-temperature, corrosive environments
Chemical processing equipment exposed to high temperatures and oxidizing conditions
Its combination of high-temperature strength, oxidation, and corrosion resistance makes it ideal for these applications.
4. How should Inconel 617 plates be processed or fabricated?
Answer:
Machining: Use carbide or coated tools; cutting fluids recommended due to work hardening
Welding: Gas tungsten arc welding (GTAW) or electron beam welding preferred; post-weld stress relief may be needed
Heat Treatment: Annealing at 982–1093°C (1800–2000°F) for stress relief
Forming: Hot forming recommended; cold forming possible with careful handling
5. What are the corrosion and oxidation resistance characteristics of Inconel 617?
Answer:
Excellent oxidation resistance in air and combustion environments up to ~1090°C (2000°F)
Resistant to carburization and sulfidation
Performs well in high-temperature corrosive environments, including some acidic gases and molten salts
