1. What is Inconel 690 (UNS N06690) typically used for?
Answer:
Inconel 690 plates are widely used in nuclear power plants, chemical processing, heat exchangers, and high-temperature industrial applications due to their excellent resistance to oxidation, corrosion, and stress corrosion cracking.
2. What are the key properties of Inconel 690 alloy plates?
Answer:
Inconel 690 offers superior resistance to intergranular corrosion and stress-corrosion cracking, excellent high-temperature strength, and outstanding performance in acidic and high-chloride environments. It maintains mechanical integrity over a wide temperature range.
3. How does Inconel 690 differ from Inconel 600?
Answer:
Compared to Inconel 600, Inconel 690 has higher chromium content (approximately 28% vs. 14–17%), which significantly improves its resistance to oxidation and stress corrosion, especially in aggressive chemical and nuclear environments.
4. Can Inconel 690 plates be welded easily?
Answer:
Yes. Inconel 690 can be welded using GTAW (TIG), GMAW (MIG), or SMAW. Using compatible filler metals such as Inconel 52 or 152 is recommended to maintain corrosion resistance and mechanical properties in welded joints.
5. What dimensions and forms are available for Inconel 690 plates?
Answer:
Inconel 690 is available in a wide range of thicknesses (from thin sheets to thick plates, typically 0.5 mm – 100 mm), widths, and lengths. Plates can also be cut-to-size according to project requirements, and are supplied in hot-rolled, cold-rolled, or annealed conditions.
