Incoloy® alloy 800H/HT

1.4876 / 1.4958 / 1.4959 | UNS N08800 / UNS N08810 / UNS N08811
Incoloy alloy 800 is a nickel-iron-chromium alloy with the same elementary composition as Incoloy 800H and Incoloy 800HT. The alloy has a high shape stability and retains its austenitic structure, even after being exposed to high temperatures for a long time. Other properties of this alloy include are a good strength and high resistance in oxidative liquid environments. The differences, albeit minimal ones, between Incoloy® 800, 800H and 800T can mostly be found in the mechanical properties. This mostly applies to the creep and rupture resistance, which is higher in the 800H and 800HT alloys.

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The properties of Incoloy® alloy 800/800H/800HT

UNS Designation N08800 N08810 N08811
Incoloy Alloys 800 800H 800HT
Nickel 30.0 – 35.0 30.0 – 35.0 30.0 – 35.0
Chromium 19.0 – 23.0 19.0 – 23.0 19.0 – 23.0
Iron 39.5 min. 39.5 min. 39.5 min.
Carbon 0.10 max 0.05 – 0.10 0.06 – 0.10
Aluminum 0.15 – 0.60 0.15 – 0.60 0.25 – 0.60
Titanium 0.15 – 0.60 0.15 – 0.60 0.25 – 0.60
Aluminum +
Titanium 0.30 – 1.20 0.30 – 1.20 0.85 – 1.20
ASTM Grain Size Not Specified 5 or Coarser 5 or Coaser
Limiting Chemical Composition, % by Weight.

The applications of Incoloy® 800H/HT

This alloy is used in chemical and petrochemical engineering, power station, industrial furnaces, and heat treatment facilities.

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