Incoloy 800H (Alloy 800H, UNS N08810) Tube Description:
The Incoloy alloy series comprises alloys manufactured by Special Metals Corporation. It consists of nickel–iron–chromium alloys used in applications that require high corrosion resistance and high-temperature strength. Incoloy alloys differ from Inconel alloys as their composition variations yield distinct application parameters.
Incoloy 800H is an iron–nickel–chromium alloy with the same basic composition as Incoloy 800, but it exhibits significantly higher creep strength. This increased strength results from strict control of the carbon, aluminium and titanium contents coupled with high-temperature annealing. During the modification of 800H, the carbon content (0.05 to 0.10%) and a grain size exceeding ASTM 5 were adjusted to optimise creep properties. Incoloy 800H also shows adjustments to the combined titanium and aluminium content (0.85 to 1.2%) to ensure optimal high-temperature performance. The alloy is certified in two forms, thereby combining the characteristics of both variations.
Other Trade Names: Alloy 800H, UNS N08810, Ferrochronin 800H, Nickelvac 800H, Nicrofer 3220, Werkstoff Nr. 1.4876

Incoloy 800H (Alloy 800H, UNS N08810) Tube Specifications:
Metal Type: UNS N08810
Standard: ASTM B407, ASTM B829, ASTM B514, ASTM B775, ASTM B515, ASTM B751, BS3 3074NA15, ISO 6207, DIN 17459, VdTÜV 412 & 434
Chemical Composition, %.
|
Ni |
Cr |
Fe |
C |
Al |
Ti |
Al+Ti |
Minimum |
30 |
19 |
39.5 |
0.05 |
0.15 |
0.15 |
0.3 |
Maximum |
35 |
23 |
|
0.1 |
0.6 |
0.6 |
1.2 |
Incoloy 800H (Alloy 800H, UNS N08810) Tube Applications:
The alloy is used in heat treatment furnaces and their components because of its increased high-temperature strength.
- Petrochemical Processing:
The alloy is employed in petrochemical processing installations, given that resistance to corrosive environments at high temperatures is required.
It is used in components of industrial furnaces, thereby meeting the demands of high-temperature operation.
The material is deployed in power generation facilities, given that it withstands the conditions encountered in high-temperature environments.