Inconel Alloy 718/UNS N07718/2.4668/NiCr19Fe19Nb5Mo3 High-Strength Bolt Fasteners For Extreme Environments And Demanding Industries
Inconel 718 (GH4169/UNS N07718/2.4668/NiCr19Fe19Nb5Mo3) is a high-strength, corrosion-resistant nickel-based superalloy widely used in extreme environments. It offers excellent mechanical properties, including high tensile, fatigue, and creep resistance up to 700°C. The alloy's composition, featuring nickel, chromium, iron, niobium, molybdenum, and titanium, enhances oxidation and corrosion resistance. Inconel 718 bolts are ideal for aerospace, power generation, marine, and chemical industries, where high-temperature and high-pressure conditions prevail. These fasteners maintain exceptional performance in harsh environments, resisting oxidation, pitting, and stress corrosion cracking. They are commonly used in jet engines, gas turbines, nuclear reactors, and deep-sea applications. With good weldability and ease of fabrication, Inconel 718 bolts provide long-term reliability in demanding industrial settings.
| Chemical Composition Wt.% | % | Fe | Cr | P | Cu | Ni | Al | Ti | C | Mn | Si | S | Mo |
| Min | | 23.5 | | | Bal. | | 0.3 | | | | | |
| Max | 4 | 26.5 | 0.013 | 0.07 | Bal. | 0.5 | 0.7 | 0.1 | 0.5 | 0.8 | 0.013 | 1.5 |
| Physical Constants | Density(g/cm³) | 8.89 |
| Melting Range(℃) | 1352-1375 |
Trade Code
| Category/Type | hex bolts |
| Head type | outer hexagonal |
| Thread tolerance | 6G |
| Material | Inconel 718 |
| 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) |
The Inconel 718 (GH4169 / UNS N07718 / 2.4668 / NiCr19Fe19Nb5Mo3) alloy bolt is a high-performance fastener known for its exceptional strength, corrosion resistance, and high-temperature stability.
Key Features:
1. High Strength & Hardness
- Precipitation-hardened nickel-based superalloy.
- Excellent tensile, fatigue, and creep resistance up to 700°C (1292°F).
- Yield strength significantly higher than standard stainless steels.
2. Excellent Corrosion Resistance
- Outstanding oxidation and corrosion resistance in extreme environments.
- Resistant to stress corrosion cracking (SCC), pitting, and crevice corrosion.
- Suitable for harsh conditions like aerospace, marine, and chemical processing.
3. Superior Heat & Oxidation Resistance
- Maintains mechanical properties and structural integrity at elevated temperatures.
- Withstands temperatures from -253°C to 700°C (-423°F to 1292°F).
4. Good Fabricability & Machinability
- Easily weldable and machinable compared to other superalloys.
- Can be heat-treated for further property enhancement.
Inconel 718 (GH4169, UNS N07718, 2.4668, NiCr19Fe19Nb5Mo3) alloy bolts are widely used in high-performance and extreme environments due to their excellent mechanical properties, corrosion resistance, and ability to withstand high temperatures.
Applications:
1. Aerospace & Aviation
- Used in gas turbine engines, including jet engines and aircraft turbine components.
- Fasteners for aircraft structural components, such as landing gear, engine mounts, and exhaust systems.
- Bolts for satellite structures and space exploration components due to their strength and oxidation resistance in extreme environments.
2. Power Generation
- Turbine bolts in steam and gas turbines, ensuring reliability under high stress and temperature.
- Fasteners in nuclear power plants, particularly in reactor cores, heat exchangers, and containment vessels due to their radiation and corrosion resistance.
3. Oil & Gas Industry
- Fasteners for offshore drilling rigs and subsea applications, exposed to high pressures and corrosive seawater environments.
- Bolts used in valves, pumps, and pipelines for transporting corrosive chemicals and hydrocarbons at high temperatures.
4. Marine & Shipbuilding
- Used in propulsion systems, exhaust manifolds, and heat exchangers of marine vessels.
- Bolts for submarine components where high strength and resistance to saltwater corrosion are required.
5. Automotive & Motorsport
- Critical fasteners in high-performance engines, such as turbochargers and exhaust systems.
- Used in racing and performance vehicles, where lightweight and heat-resistant materials are necessary.
6. Chemical & Petrochemical Processing
- Fasteners for reactors, heat exchangers, and chemical processing equipment exposed to highly corrosive environments.
- Used in acid and alkaline processing plants due to their exceptional chemical resistance.
7. Cryogenic Applications
- Inconel 718 bolts maintain their mechanical properties even at extremely low temperatures, making them ideal for cryogenic tanks and storage vessels.
- Used in liquefied natural gas (LNG) plants and space propulsion systems requiring ultra-low temperature stability.
8. Medical Industry
- Used in medical devices and implants, particularly in prosthetics and surgical instruments that require high strength and biocompatibility.
Why Choose Inconel 718 Bolts?
- High Strength & Toughness: Maintains structural integrity even at high temperatures up to 700°C (1300°F).
- Corrosion & Oxidation Resistance: Performs well in extreme environments, including saltwater, acidic, and oxidizing conditions.
- Creep & Fatigue Resistance: Ideal for cyclic loading applications where long-term durability is critical.
- Cryogenic Suitability: Retains strength at temperatures as low as -200°C, making it excellent for aerospace and LNG applications.
