Incoloy® 800 / 800H / 800HT
Incoloy 800 series alloys are nickel-iron-chromium superalloys designed for high-strength and resistance to oxidation and carburization at elevated temperatures. The alloy structure remains stable even after long-term exposure to high heat.
- Forme comuni: Seamless Pipe, Welded Tube, Plate, Sheet, Round Bar, Wire, Fittings.
- Caratteristiche principali: Excellent resistance to chloride-ion stress-corrosion cracking.
- Temperature Range: Up to 1100°F (595°C) for Alloy 800; Above 1100°F for 800H/HT.
- Stock Status: Available in stock (Standard sizes) & Custom Forging.
While all three grades share the same basic chemical composition, the differences lie in the Carbon, Aluminum, and Titanium content, and the annealing process used. These differences determine the alloy's creep rupture strength.
Incoloy 800 (UNS N08800)
Carbon: 0.10% max
Annealing: 980-1040°C
General purpose grade. Used for applications up to 1100°F (595°C) where high ductility and corrosion resistance are required.
Incoloy 800H (UNS N08810)
Carbon: 0.05 - 0.10%
Annealing: 1150-1200°C
Solution annealed with controlled carbon for significantly higher creep-rupture strength. Designed for temps above 1100°F.
Incoloy 800HT (UNS N08811)
Carbon: 0.06 - 0.10%
Al + Ti: 0.85 - 1.20%
The strongest of the series. The specific addition of Titanium and Aluminum ensures maximum high-temperature structural integrity.
| Elemento | Incoloy 800 | Incoloy 800H | Incoloy 800HT |
|---|---|---|---|
| Nichel (Ni) | 30.0 - 35.0 | 30.0 - 35.0 | 30.0 - 35.0 |
| Cromo (Cr) | 19.0 - 23.0 | 19.0 - 23.0 | 19.0 - 23.0 |
| Ferro (Fe) | 39.5 min (Balance) | 39.5 min (Balance) | 39.5 min (Balance) |
| Carbonio (C) | 0,10 max | 0.05 - 0.10 | 0.06 - 0.10 |
| Aluminum + Titanium | 0.30 - 1.20 | 0.30 - 1.20 | 0.85 - 1.20 |
| Forma del prodotto | Standard ASTM / ASME |
|---|---|
| Tubi e tubature (senza saldatura) | ASTM B407, ASME SB407 |
| Tubi e tubature (saldati) | ASTM B154, ASTM B515, ASME SB515 |
| Piastra, foglio, striscia | ASTM B409, ASME SB409 |
| Bar & Rod | ASTM B408, ASME SB408 |
| Raccordi | ASTM B366, ASME SB366 |
| Forgiati | ASTM B564, ASME SB564 |
| Proprietà | Alloy 800 (Annealed) | Alloy 800H / 800HT (Solution Annealed) |
|---|---|---|
| Tensile Strength (ksi / MPa) | 75 (520) min | 65 (450) min |
| Yield Strength 0.2% Offset (ksi / MPa) | 30 (205) min | 25 (170) min |
| Elongation (%) | 30% min | 30% min |
*Note: Alloy 800H/HT have slightly lower room-temperature strength due to the high-temperature solution anneal treatment, which maximizes creep properties at high heat.
Trattamento petrolchimico
Ethylene furnace quench boilers, hydrocarbon cracking, and pigtails/headers.
Heat Treating Equipment
Radiant tubes, muffles, retorts, and fixtures exposed to high furnace temperatures.
Generazione di energia
Superheater and reheater tubing in fossil fuel plants; heat exchangers in nuclear reactors.
Industrial Sheathing
Sheathing for electric heating elements due to good electrical resistance.
Ready to Order Incoloy 800?
We offer competitive pricing and global shipping on Incoloy 800, 800H, and 800HT. Send us your Bill of Materials (BOM) today.
Contact Sales Team