Common Trade Names: Incoloy 800HT, Alloy 800HT
INCOLOY 800HT alloys seamless and weld tube belong to the category
of super austenitic stainless steels. These alloys have
nickel-chromium-iron as the base metals, with additives such as
molybdenum, copper, nitrogen and silicon. These alloys are known
for their excellent strength at elevated temperatures and good
corrosion resistance in a variety of corrosive environments.
INCOLOY alloy 800HT is an alloy of nickel, iron and chromium. The
alloy is capable of remaining stable and maintaining its austenitic
structure even after long time exposures to high temperatures.
Other characteristics of the alloy are good strength, and high
resistance to oxidizing, reducing and aqueous environments. The
standard forms in which this alloy is available are round, flats,
forging stock, tube, plate, sheet, wire and strip.
Alloy 800HT is frequently used in applications that involve
long-term exposure to elevated temperatures where resistance to
oxidation, carburization and other types of elevated temperature
corrosion is required. Heat treatment and power generation are two
common industries where alloy 800 H/HT® is used. Typical
applications include superheater and reheater tubing, headers,
pigtails, outlet manifolds and sheathing for heating elements.
Chemical Properties of Incoloy 800HT
| Incoloy | Ni | Cr | Fe | C | Mn | S | Si | Cu | Al | Ti | p |
| 800HT | 30.0-35.0 | 19.0-23.0 | 39.5min | 0.06-0.1 | 1.50max. | 0.015max. | 1.0max. | 0.75max. | 0.15-0.60 | 0.15-0.60 | 0.045max |
Some typical applications are:
- Heat-treating equipment such as baskets, trays, and fixtures.
- Chemical and petrochemical processing,
- Heat exchangers and other piping systems in nitric acid media
especially where resistance to chloride stress-corrosion cracking
is required.
- Nuclear power plants, it is used for steam-generator tubing.
- Domestic appliances for sheathing of electric heating elements.
- Production of paper pulp, digester-liquor heaters are often made of
alloy 800.
- Petroleum processing, the alloy is used for heat exchangers that
air cool the process stream.
- ,Type we could offer
| AMS Number | Alloy | Type | UNS | Cross Ref. Spec | Misc./Shape | |
|---|
| AMS 5766 Bar | Incoloy 800HT | Nickel | N08811 | - | Bar |  |
| AMS 5766 Custom Tube | Incoloy 800HT | Nickel | N08811 | - | Custom Tube |  |
| AMS 5871 Plate | Incoloy 800HT | Nickel | N08811 | - | Plate |  |
| AMS 5871 Sheet | Incoloy 800HT | Nickel | N08811 | - | Sheet |  |
| AMS 5871 Strip | Incoloy 800HT | Nickel | N08811 | - | Strip |  |
