1. What are the typical applications of Incoloy 825 round bar?
Answer:
Incoloy 825 round bars are commonly used in chemical processing, marine environments, oil & gas, acid production, nuclear fuel reprocessing, and pollution control equipment. The alloy is ideal for applications involving acid exposure, especially sulfuric, phosphoric, and nitric acids.
2. What are the key corrosion-resistant properties of Incoloy 825?
Answer:
Incoloy 825 offers excellent resistance to:
Sulfuric and phosphoric acid
Pitting and crevice corrosion
Stress corrosion cracking
Intergranular corrosion after welding
Oxidizing and reducing environments
This makes it a versatile alloy in corrosive service conditions.
3. What is the chemical composition of Incoloy 825 (UNS N08825)?
Answer:
Typical composition includes:
Nickel (Ni): 38–46%
Iron (Fe): Balance (~22%)
Chromium (Cr): 19.5–23.5%
Molybdenum (Mo): 2.5–3.5%
Copper (Cu): 1.5–3%
Titanium (Ti): 0.6–1.2%
This composition provides a balance of corrosion resistance and mechanical strength.
4. Is Incoloy 825 round bar suitable for high-temperature use?
Answer:
Yes, Incoloy 825 retains its strength and corrosion resistance up to about 540°C (1000°F). However, for extremely high-temperature structural applications, other alloys like Incoloy 800H or Inconel 625 may be more appropriate.
5. Can Incoloy 825 round bar be machined and welded?
Answer:
Yes. Incoloy 825 can be machined using conventional techniques, though work hardening requires slower cutting speeds and rigid tooling. It is also readily weldable using standard welding methods like GTAW (TIG) and GMAW (MIG) with suitable nickel-based filler metals.
