1. What is the chemical composition of Inconel X750 (UNS N07750) / Nimonic 90 (UNS N07090)?
Answer:
Nickel (Ni): 70% min
Chromium (Cr): 14–17%
Iron (Fe): 6–9%
Cobalt (Co): 1–2%
Molybdenum (Mo): 1–2.5%
Titanium (Ti): 0.70–1.15%
Aluminum (Al): 0.40–0.80%
Carbon (C): 0.10% max
Minor elements include manganese, silicon, and copper.
This composition provides high-temperature strength, corrosion resistance, and creep resistance, ideal for aerospace and power generation applications.
2. What are the mechanical properties of these high-temperature nickel alloy plates?
Answer (typical for solution-treated and aged condition):
Tensile Strength: 1100–1400 MPa
Yield Strength: 860–1030 MPa
Elongation: 12–20%
Hardness (Rockwell C): 35–40 HRC
These alloys exhibit excellent creep, fatigue, and stress-rupture resistance at temperatures up to 700°C–750°C.
3. What does "hot rolled high-quality" indicate for these plates/sheets?
Answer:
Hot rolling improves grain structure, toughness, and dimensional uniformity.
High-quality indicates careful heat treatment and surface finish to ensure minimal defects and consistent mechanical performance.
Ideal for critical aerospace, turbine, and high-temperature chemical applications.
4. What are the main differences between Inconel 625, X750, and Nimonic 90?
Answer:
Inconel 625: Excellent corrosion and oxidation resistance, moderate high-temperature strength.
Inconel X750: High creep and stress-rupture resistance, used for turbine and aerospace fasteners.
Nimonic 90: High temperature strength and fatigue resistance, optimized for gas turbines and power plants.
Selection depends on operating temperature, mechanical load, and environmental conditions.
5. What are the typical applications for these high-temperature nickel alloy plates and sheets?
Answer:
Aerospace turbine discs, blades, and fasteners
Power generation boiler tubes, furnace components, and heat exchangers
Chemical processing reactor vessels, piping, and high-temperature tanks
Marine engineering components exposed to oxidizing and corrosive high-temperature environments
