The chemical composition of UNS N08811（Incoloy800HT）
Tech Center 2025-08-01 8
Incoloy 800HT is a fully austenitic low-carbon nickel-iron-chromium alloy of the same series as Incoloy800. The cobalt content in this alloy can be strictly controlled below 0.01%. The Incoloy800HT can resist corrosion from many corrosive media. Its relatively high nickel content endows it with excellent resistance to stress corrosion cracking under water-based corrosive conditions. The high chromium content endows it with better resistance to pitting and crevice corrosion cracking. This alloy has excellent resistance to nitric acid and organic acid corrosion, but its corrosion resistance in sulfuric acid and hydrochloric acid is limited. Except for the possibility of pitting corrosion in halides, it has excellent corrosion resistance in both oxidizing and non-oxidizing salts. It also has excellent corrosion resistance in water, steam, and mixtures of steam, air, and carbon dioxide.
The density of this alloy is ρ=7.94g/cm³.
