Incoloy 800HT (UNS N08811)
Incoloy 800HT (UNS N08811) nickel-iron-chromium alloys that have the same basic composition as INCOLOY alloy 800 but with significantly higher creep-rupture strength. The higher strength results from close control of the carbon, aluminum and titanium contents in conjunction with a hightemperature anneal. Used in chemical and petrochemical processing, power plants for super-heater and reheater tubing, industrial furnaces and heat-treating equipment.
Equivalent Grades
Trademarks | GB | JIS | KS | ASTM | UNS | DIN | W.Nr | GOST | BS | NF |
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Incoloy 800HT | NS1102 NS112 | | | Incoloy 800HT | N08811 | X10NiCrAlTi32-20 | 1.4959 | – | NA15H | – |
Product Forms
Wire, Bar, Strip, Sheet, Plate, Tube, Pipe, Pipe Fittings, Forgings
Chemical Composition,%
C | P | S | Mn | Si | Cr | Ni | Al+Ti | Ti | Fe |
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0.06~0.10 | ≤0.03 | ≤0.02 | ≤3.00 | ≤0.10 | 19.00~23.00 | 30.00~35.00 | 0.25~1.20 | 0.15~0.60 | ≥39.5 |
Typical Physical & Mechanical Properties (RT, Solution Annealed)
Density, g/cm3 | Melting point, ℃ | Tensile strength, MPa | Yield strength, MPa | Elongation,% |
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8.00 | 1357-1375 | 531 | 200 | 52 |
Specifications
Rod, Bar, Wire, Forgings | ASTM B408/ASME SB408, ASTM B564/ASME SB564, ISO 9723/9724/9725 |
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Plate, Sheet, Strip | ASTM A240/A480/B409/B906/ASME SA240/SA480/SB409/SB906, ISO 6208 |
Pipe, Tube | ASTM B163/ASME SB163, ASTM B407/B829/ASME SB407/SB829, ASTM B514/B775/ASME SB514/SB775, ASTM B515/B751/ASME SB515/SB751, ISO 6207 |
Others | ASTM B366/ASME SB366(Fittings) |
Features
- Resistance to prolonged exposure to elevated temperatures
- Excellent resistance to oxidation, sulfidation, and carburization
- Added Carbon and annealing treatment allows for higher creep and rupture properties above 600℃
- Resistant to high temperature corrosion
- Readily machined by standard methods
- Best joined/welded using products for high temperature situations
- Resistance to aqueous corrosion at moderate temperatures
Applications
- Chemical and Petrochemical Processing—process equipment for the production of ethylene, ethylene dichloride, acetic anhydride, ketene, nitric acid and oxy-alcohol
- Petroleum Refining—steam/hydrocarbon reformers and hydrodealkylation units
- Power Generation—steam super-heaters and high temperature heat exchangers in gas-cooled nuclear reactors, heat exchangers and piping systems in coal-fired power plants
- Thermal Processing Fixtures—radiant tubes, muffles, retorts and fixtures for heat-treating furnaces