Jiangyin Chengxin Alloy Material Co., Ltd ，
Jiangsu Xiangcheng Supply Chain Management Co. LTD
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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
| GB | Commercial Code | UNS | DIN/DIN EN | W-Nr. | JIS |
| NS111 | Incoloy800 | UNS N08800 | X2NiCrAlTi3220 | 1.4558 | NCF800/NCF2B |
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:
Excellent mechanical strength at elevated temperatures (up to ~1100°F / 593°C).
Resists creep and stress rupture.
Resists oxidation and carburization in high-temperature environments.
Good resistance to reducing, oxidizing, and aqueous environments.
Maintains microstructural stability at high temperatures, preventing embrittlement.
Low tendency to form sigma phase, which could reduce toughness.
Provides a balance of strength, corrosion resistance, and ease of fabrication.
Contains small amounts of aluminum and titanium for enhanced oxidation resistance.
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:
Petrochemical & Chemical Processing:
Power Generation:
Aerospace & Aviation:
Heat Treatment & Furnace Equipment:
Marine & Offshore Industries:
Nuclear Industry:
