UNS N08800/Incoloy800/NS111/1.4558/X2NiCrAlTi3220/NCF800/NCF2B Nut For Nuclear Power Plants
The UNS N08800 (Incoloy 800) nut is a high-temperature, corrosion-resistant fastener made from a nickel-iron-chromium alloy. It offers excellent strength, oxidation, and carburization resistance at elevated temperatures. Commonly used in heat exchangers, furnace components, and chemical processing, it maintains structural integrity in extreme environments. Equivalent grades include NS11, 1.4558, X2NiCrAlTi32-20, NCF800, and NCF2B.
| Chemical Composition Wt.% | % | Fe | C | Si | Mn | S | Cr | Ni | Cu | Ti | Al |
| Min | 39.5 |
|
|
|
| | 30 | | 0.15 | 0.15 |
| Max |
| 0.1 | 1 | 1.5 | 0.015 | 0.015 | 35 | 0.75 | 0.6 | 0.6 |
| Physical Constants | Density(g/cm³) | 7.94 |
| Melting Range(℃) | 1357–1385°C |
| AlloyState | Recovery Strength Reduction (RP0.2) N/mm2 | Tensile Strength Rm N/mm2) | Elongation A5% |
| Solid Solution State | 210 | 500 | 30 |
Trade Code
The UNS N08800 (Incoloy 800) Nut has several key features that make it ideal for high-temperature and corrosion-resistant applications. Here are its main characteristics:
Key Features:
- High-Temperature Strength:
Excellent mechanical strength at elevated temperatures (up to ~1100°F / 593°C).
Resists creep and stress rupture.
- Oxidation & Corrosion Resistance:
Resists oxidation and carburization in high-temperature environments.
Good resistance to reducing, oxidizing, and aqueous environments.
- Good Metallurgical Stability:
Maintains microstructural stability at high temperatures, preventing embrittlement.
Low tendency to form sigma phase, which could reduce toughness.
- Nickel-Iron-Chromium Composition:
Provides a balance of strength, corrosion resistance, and ease of fabrication.
Contains small amounts of aluminum and titanium for enhanced oxidation resistance.
- Excellent Fabricability & Weldability:
Easily machined, formed, and welded without significant issues.
Can be used in applications requiring strong and durable fastening solutions.
The UNS N08800 (Incoloy 800) nut is a high-temperature, corrosion-resistant fastener made from a nickel-iron-chromium alloy. This material is known for its excellent strength and resistance to oxidation, carburization, and sulfidation at elevated temperatures. It is commonly used in applications that require high-temperature strength and corrosion resistance, such as:
Applications of UNS N08800/Incoloy 800 Nuts:
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Petrochemical & Chemical Processing:
- Heat exchangers
- Process piping
- Pressure vessels
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Power Generation:
- Steam generators
- Heat recovery steam generators (HRSGs)
- Superheater and reheater tubing
-
Aerospace & Aviation:
- Jet engine components
- Exhaust systems
-
Heat Treatment & Furnace Equipment:
- Furnace fasteners
- High-temperature fixtures
-
Marine & Offshore Industries:
- Heat-resistant fasteners for offshore platforms
- Components exposed to corrosive seawater and high temperatures
-
Nuclear Industry:
- High-temperature reactor components
- Structural components in nuclear plants
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UNS N08800/Incoloy800/NS111/1.4558/X2NiCrAlTi3220/NCF800/NCF2B Nut For Nuclear Power Plants Images
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