Incoloy 800, Incoloy 800H, Incoloy 800HT

Alloy 800 series (Incoloy 800, 800H and 800HT) are nickel-iron-chromium superalloys that offer high temperature strength and resistance to oxidation, carburization and other types of high-temperature corrosion. Alloy 800 (UNS N08800), Alloy 800H (UNS N08810) and Alloy 800HT (UNS N08811) have the same content of Nickel, Chromium and iron, what makes the difference is the combined titanium and aluminum levels (0.85 to 1.2%) to ensure optimum high temperature properties.

LKALLOY mainly stocks and produces Alloy 800 plate, Alloy 800 pipe, Alloy 800 bar and other forms in various size and specifications. They are mainly used in various applications from furnace components, petrochemical furnace cracker tubes to sheathing for electrical heating elements.

Available Forms And Specifications

Sheet / Plate / Strip: AMS 5871, ASTM A 240/A 480, ASTM B 409, ASTM B 906
Seamless Pipe / Tube: ASTM B 407, ASTM B 829
Welded Pipe / Tube: ASTM B 515
Round / Flat bar: ASTM B 408, ISO 9723
Fittings: ASTM B 366, ASME SB-366
Forgings: AMS 5766, ASTM B564

Chemical Composition

Alloy Ni Cr Fe, min C, max Al Ti Al+Ti
Alloy 800 30-35 19-23 39.5 0.10 0.15-0.60 0.15-0.60 0.30-1.20
Alloy 800H 30-35 19-23 39.5 0.05-0.10 0.15-0.60 0.15-0.60 0.30-1.20
Alloy 800HT 30-35 19-23 39.5 0.06-0.10 0.25-0.60 0.25-0.60 0.85-1.20

Mechanical Properties

Density, g/c㎡ 7.94
Melting range, ℃ 1357-1385
Tensile strength, min, Mpa 550
Yield strength, 0.2% offset, min, Mpa 240
Elongation, %, min 30
Hardness, Rockwell /


Incoloy 800 series is mainly used in chemical processing and nuclear power industrial:

  • Industry radiant tubes, return bends, muffles, retorts and furnace fixtures
  • Petrochemical furnace cracker tubes
  • Hydrocarbon Processing Industry catalyst tubing, convection tubing, outlet manifolds and quenching system piping
  • Power Generation Industry steam superheating tubing, high-temperature heat exchangers

LKALLOY is a leading supplier of Alloy 800 and other high-quality special metal alloys with decades of experience and extensive specifications. To buy or learn more about Alloy 800, contact us now.

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