Incoloy Alloy 800 is a widely used structural material for equipment that must have high strength and resist oxidation, carburizing and other harmful effects of high temperature exposure (for high temperature applications requiring optimal creep and fracture properties, use Incoloy Alloy 800H and 800HT).
The major differences between alloys 800, 800H and 800HT are mechanical properties. The differences stem from the restricted compositions of alloys 800H and 800HT and the high-temperature anneals used for these alloys. In general, alloy 800 has higher mechanical properties at room temperature and during short-time exposure to elevated temperatures, whereas alloys 800H and 800HT have superior creep and rupture strength during extended high temperature exposure. Incoloy 800/800H/800HT Chemical Composition| Alloy | % | Ni | Cr | Fe | C | Mn | Si | Cu | S | Al | Ti | Al+Ti |
| Incoloy 800 | Min. | 30 | 19 | balance | - | - | - | - | - | 0.15 | 0.15 | 0.3 |
| Max. | 35 | 23 | 0.10 | 1.5 | 1 | 0.75 | 0.015 | 0.60 | 0.60 | 1.2 | ||
| Incoloy 800H | Min. | 30 | 19 | balance | 0.05 | - | - | - | - | 0.15 | 0.15 | 0.3 |
| Max. | 35 | 23 | 0.10 | 1.5 | 1 | 0.75 | 0.015 | 0.60 | 0.60 | 1.2 | ||
| Incoloy 800HT | Min. | 30 | 19 | balance | 0.06 | - | - | - | - | 0.25 | 0.25 | 0.85 |
| Max. | 35 | 23 | 0.10 | 1.5 | 1 | 0.75 | 0.015 | 0.60 | 0.60 | 1.2 |
| Density (g/cm3) |
Melting point (℃ ) |
Elastic modulus ( GPa) |
Thermal conductivity (λ/(W(m•℃)) |
Thermal expansion coefficient ( 24 -100°C)(m/m °C) |
Operating temperature (°C ) |
| 7.94 | 1357-1385 | 196 | 1.28 | 14.2 | -200 ~ +1,100 |
| Alloy | Form | Condition | Ultimate Tensile strength ksi (MPa) |
Yield strengthat 0.2% offset ksi (MPa) |
Elongation in 2″or 4D, percent |
| 800 | Sheet, Plate | Annealed | 85 (586) | 40 (276) | 43 |
| 800 | Sheet, Plate Strip, Bar |
Annealed | 75 (520)* | 30 (205)* | 30* |
| 800H | Sheet, Plate | SHT | 80 (552) | 35 (241) | 47 |
| 800H | Sheet, Plate Strip, Bar |
SHT | 65 (450)* | 25 (170)* | 30* |
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Bar/Rod |
Wire |
Strip/Coil |
Sheet/Plate |
Pipe/Tube |
Fitting |
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ASTM B 408 & SB 408 |
ASTM B408, AMS 5766, ISO 9723, ISO 9724, BS 3076NA15, BS 3075NA15, EN 10095, VdTüV 412 & 434, AWS A5.11 ENiCrFe-2, AWS A5.14 ERNiCr-3 |
ASTM B 409/B 906, ASME SB 409/SB 906, ASME Code Case 1325, 2339 |
ASTM B409, AMS 5877, BS 3072NA15, BS 3073NA15, VdTüV 412 & 434, DIN 17460, EN 10028-7, EN 10095 |
ASTM B 163/ SB 163 |
ASTM B366 |
Round bars/Flat bars/Hex bars, Size From 8.0mm-320mm, Used for bolts,fastners and other spare parts
Supply in welding wire and spring wire in coil form and cut length.
Standards size and customized dimension can be produced by us with precision tolerance
Widths up to 1500mm and lengths up to 6000mm,Thickness from 0.1mm to 100mm.
Standards size and customized dimension can be produced by us with small tolerance
Soft condition and hard condition with AB bright surface, width up to 1000mm
Alloy materials in forms of Bolts,screws,flanges and other fasterners, according to clients specification.
• Excellent corrosion resistance in the water media of the extremely high temperature of 500℃.
• Good stress corrosion resistance
• Good machining
• High creep strength
• Very good resistance to oxidation
• Good resistance to combustion gases
• Very good resistance to carburization
• Good resistance to nitrogen absorption
• Good structural stability at high temperatures
• Good weldability
• Ethylene furnace quench boilers • Hydrocarbon cracking
• Valves, fittings and other components exposed to corrosive attack from 1100-1800° F
• Industrial furnaces • Heat-treating equipment
• Chemical and petrochemical processing • Heat exchangers
• Super-heater and re-heaters in power plants • Pressure vessels