https://www.nickelalloytubes.com/products/incoloy-800ht-n08811-nickel-alloy-pipe-tube.html Incoloy 800HT (N08811 1.4959 ) High-temperature alloy has high-temperature hot corrosion and high-temperature abrasion resistance. The Incoloy 800HT pipe can work long-term above 600 ℃ under certain stress conditions.