Incoloy 800H 800HT
Incoloy 800H 800HT
Features:
UNS Number N08810

Incoloy 800H has a restricted carbon content range of 0.05 to 0.10%, which is in the upper portion of that of Incoloy 800, and is annealed at 1149 to 1177℃ (Incoloy 800 is annealed at 983 to 1038℃). These differences impart it to have higher stress rupture and creep properties than Incoloy 800.

Applications:
Chemical and petrochemical process piping, high temperature heat exchangers, furnace components, carburizing equipment, heating-element sheathing, and nuclear power steam superheating tubing.

Products of Incoloy 800H available
• Sheet
• Plate
• Bar
• Pipe & Tube (welded & seamless)
• Fittings (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples)
• Wire

Chemical composition:

% Fe Ni Cr C Mn Si S Cu Al Ti
Min 39.5 30.0 19.0 0.05 0.15 0.15
Max 35.0 23.0 0.10 1.50 1.00 0.015 0.75 0.60 0.60

Physical properties:
Density 7.94 g/cm3
Melting range 1357-1385℃

ASTM Specifications
Alloy Pipe Smls Pipe Welded Tube Smls Tube Welded Sheet/Plate Bar Forging Fitting
Alloy 800 (UNS N08800) B407 B154 B163 B515 B409 B408 B564 B366
Alloy 800H (UNS N08810) B407 B154 B163 B515 B409 B408 B564 B366
Alloy 800HT (UNS N08811) B407 B154 B163 B515 B409 B408 B564 B366
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