Incoloy 800 (Alloy 800, UNS N08800) Flange Description:
Incoloy alloy is also a range of superalloys produced by Special Metals Corporation. They are nickel-iron-chromium alloys that are used for applications that require high corrosion resistance and high-temperature strength. Incoloy alloys are quite similar to Inconel alloys but their different composition makes some distinctions in their applications.
Alloy 800 is a widely used material of construction for equipment that must resist corrosion, have high strength or resist oxidation, carburization, and other harmful effects of high-temperature exposure. The Chromium in the alloy imparts resistance to oxidation and corrosion. The high Nickel content maintains an austenitic structure so that the alloy is ductile. The Nickel also contributes resistance to scaling, general corrosion, and stress corrosion cracking. The iron content provides resistance to internal oxidation.
Other trade names: Alloy 800, UNS N08800, Ferrochronin 800, Nickelvac 800, Nicrofer 3220, Werkstoff Nr. 1.4876

Incoloy 800 (Alloy 800, UNS N08800) Flange Specifications:
Metal Type: UNS N08800
Standard: ASTM B564, AMS 5766, ISO 9725
Chemical Composition, %
|
C |
Cr |
Fe |
Ni |
Al |
Ti |
Al/Ti |
Min |
|
19 |
39.5 |
30 |
0.15 |
0.15 |
0.3 |
Max |
0.1 |
23 |
|
35 |
0.60 |
0.60 |
1.2 |
Incoloy 800 (Alloy 800, UNS N08800) Flange Applications:
- Steam/hydrocarbon reforming for components such as pigtails, headers, collectors, manifolds, transfer piping, catalyst tubes, and quench system piping
- Ethylene pyrolsis tubing in convection and radiant sections - resistance to carburization and good mechanical properties
- Ethylene dichloride cracking tubes - resistance to carburization and to dry hydrogen chloride and chlorine components, e.g. Heat exchangers, piping systems, etc., in coal conversion plants
- Steam generators tubing in helium coolant, high-temperature reactor systems - high strength, resistance to helium and steam
Packing:
Our Incoloy 800 materials are carefully handled during storage and transportation to preserve the quality of our product in its original condition.
FAQs
Q1. What is Incoloy 800 Flange?
· Incoloy 800 Flange (also known as Alloy 800 or UNS N08800) is a high-performance alloy flange made primarily from nickel, chromium, and iron. This flange is used to connect pipes, valves, and other equipment in high-temperature and corrosive environments.
Q2. What are the main applications of Incoloy 800 Flange?
Incoloy 800 Flange is widely used in industries that require high-temperature resistance and corrosion resistance. Common applications include:
- Chemical Processing: For flanged connections in chemical reactors, pipelines, and heat exchangers.
- Power Generation: For steam systems, heat exchangers, and turbines.
- Nuclear Power: For components in reactors and associated piping.
- Oil & Gas: Used in high-pressure systems in oil and gas processing plants.
- Furnace and Heat Exchanger: In high-temperature furnaces and heat exchangers.
Q3. What are the properties of Incoloy 800 Flange?
- Corrosion Resistance: It resists oxidation, carburization, and other forms of corrosion, making it ideal for harsh environments.
- High-Temperature Strength: Incoloy 800 maintains its strength even at elevated temperatures, up to 1,100°F (593°C).
- Weldability: It is easily weldable, allowing for easy integration into piping systems.
- Thermal Stability: It performs well under both high thermal and mechanical stress.
- Fatigue Resistance: The alloy offers good resistance to fatigue, particularly at high temperatures.