UNS N08800/Incoloy800/NS111/1.4558/X2NiCrAlTi3220/NCF800/NCF2B High Temperature Alloy Bolt For Extreme Industrial Settings
UNS N08800/Incoloy800/NS111/1.4558/X2NiCrAlTi3220/NCF800/NCF2B High Temperature Alloy Bolt For Extreme Industrial Settings
The UNS N08800 (Incoloy 800) high-temperature alloy bolt is engineered for extreme heat and corrosive environments. This nickel-iron-chromium alloy offers excellent resistance to oxidation, carburization, and high-temperature corrosion, making it ideal for heat exchangers, furnaces, and power plants. With controlled carbon content and added titanium and aluminum, it maintains strength and stability up to 1100°F (593°C).
Equivalent designations include NS11, 1.4558, X2NiCrAlTi3220, NCF800, and NCF2B. These bolts exhibit high mechanical strength, superior creep resistance, and good weldability, ensuring long service life in demanding conditions. Their robust performance in high-stress environments makes them suitable for petrochemical, aerospace, and nuclear applications.
Due to its excellent metallurgical stability, Incoloy 800 bolts prevent premature failure in high-temperature operations. The alloy's versatility and durability make it a preferred choice for securing components in extreme industrial settings, ensuring safety and reliability under thermal and mechanical stress.
| 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 |
| Category/Type | hex bolts |
| Head type | outer hexagonal |
| Thread tolerance | 6G |
| Material | Incoloy800 |
| Performance level | 8.8 |
| Thread specification | M6~M100 |
| Head side length | 10-120(mm) |
| Head thickness | 6.6-60(mm) |
| Total length | 30~800(mm) |
UNS N08800 (Incoloy 800) is a high-temperature alloy widely used in applications requiring excellent strength and oxidation resistance at elevated temperatures. Here are the key features of bolts made from this alloy:
Key Features of UNS N08800 (Incoloy 800) Alloy Bolts:
- High-Temperature Resistance – Maintains structural integrity and mechanical strength at temperatures up to 1100°F (593°C) and beyond.
- Excellent Oxidation and Corrosion Resistance – Withstands oxidation, carburization, and sulfidation in high-temperature environments.
- Superior Mechanical Strength – Offers good tensile and creep strength at elevated temperatures, making it suitable for stress-prone applications.
- Resistance to Thermal Fatigue and Creep – Performs well under prolonged thermal cycling and stress conditions.
- Good Fabricability & Weldability – Can be formed and welded using standard techniques without losing corrosion resistance.
- Chemical Composition Stability – Low-carbon, nickel-iron-chromium composition ensures resistance to chloride stress corrosion cracking and intergranular attack.
The UNS N08800 (Incoloy 800) / NS11 / 1.4558 / X2NiCrAlTi32-20 / NCF800 / NCF2B high-temperature alloy is a nickel-iron-chromium alloy designed for excellent strength and oxidation resistance at high temperatures. This alloy is widely used in various high-temperature environments where strength, corrosion resistance, and thermal stability are critical.
Applications of High-Temperature Alloy Bolts (UNS N08800 / Incoloy 800)
- Power Plants & Boilers
Used in heat exchangers, superheater tubes, and steam generators.
Provides resistance to thermal fatigue and oxidation.
- Petrochemical & Refining Industry
Found in furnaces, catalytic cracking units, and reactors.
Withstands high-temperature carburization and oxidation.
- Aerospace & Aviation
Used in jet engines, exhaust systems, and heat shields.
Offers strength retention at elevated temperatures.
- Chemical Processing Plants
Employed in piping, reactors, and heat exchangers for acids and corrosive environments.
Resists stress corrosion cracking in chloride-containing environments.
- Nuclear Power Industry
Used in steam generator tubing, reactor components, and structural fasteners.
Excellent radiation resistance and thermal stability.
- Heat Treatment & Furnace Applications
Found in furnace fasteners, fixtures, and radiant tubes.
Can endure extreme thermal cycling and oxidation.
- Automotive & Exhaust Systems
Utilized in turbochargers, exhaust manifolds, and high-performance engine bolts.
Provides oxidation resistance in high-temperature gases.
- Marine & Offshore Applications
Used in offshore drilling rigs, subsea components, and marine exhaust systems.
Maintains corrosion resistance in salty, high-temperature environments.
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