AlloyAlloy 800 Incoloy 800 (N08800)
FamilyNickel Alloys
Supplied toASTM B163, ASTM B407, ASME SB-407
Typical serviceHigh-temperature, Steam generators, Furnace tube
Size range1/4" to 3" OD, .028" to .220" wall
TempersAnnealed (800), solution annealed with grain size control (800H, 800HT)
Testing100% eddy current or ultrasonic per B163/B407, hydrostatic, flattening, flaring; grain size and PMI on request
OriginDomestic and approved mills, inspected and certified in Hillsboro
Sourced alloy, certified in HillsboroAmeritube does not manufacture Alloy 800 in Texas. It is supplied from qualified domestic and international mills, then received, inspected, tested, and released under our ISO 9001:2015 system in Hillsboro, Texas, with a full mill test report.
What Alloy 800 is
Alloy 800 is an iron-nickel-chromium alloy, roughly 46% iron, 32% nickel, 21% chromium, with aluminum and titanium. The nickel content is high enough to prevent chloride stress corrosion cracking and to keep the austenitic structure stable at temperature; the chromium provides oxidation resistance. Three grades exist:
- Alloy 800 (N08800): general corrosion and moderate temperature service.
- Alloy 800H (N08810): 0.05 to 0.10% carbon and ASTM grain size 5 or coarser, for creep strength above 1100 degrees F under ASME Section VIII and Section I.
- Alloy 800HT (N08811): 800H with controlled aluminum plus titanium for the highest creep strength.
Standards we supply to
- ASTM B163 / ASME SB-163, condenser and heat exchanger tube
- ASTM B407 / ASME SB-407, seamless pipe and tube
- ASTM B514 and B515 welded on request
Chemical composition, Alloy 800H
| Element | Requirement |
|---|---|
| Nickel | 30.0 to 35.0% |
| Chromium | 19.0 to 23.0% |
| Iron | 39.5% min |
| Carbon | 0.05 to 0.10% |
| Aluminum + Titanium | 0.30 to 1.20% |
Typical mechanical properties, annealed
| Property | Value |
|---|---|
| Tensile strength | 65,000 psi min (450 MPa) |
| Yield strength | 25,000 psi min (170 MPa) |
| Elongation in 2" | 30% min |
Where it is used
- Ethylene and steam methane reformer furnace tubes and pigtails.
- Nuclear and industrial steam generator tube.
- Heat treating fixtures, radiant tubes, and muffles.
- Petrochemical process heaters and high-temperature exchangers.
- Superheater and reheater tube in coal and waste-fired boilers.
What to put in your Alloy 800 RFQ
800, 800H, or 800HT, OD, wall, length, quantity, ASTM B163 (heat exchanger) or B407 (pipe and tube), design temperature, grain size, and the ASME Section or licensor specification.