INCONEL X-750 FASTENERS | ULTIMATE GUIDE
Ananka Fasteners is a premier manufacturer and global supplier of high-performance Inconel X-750 Fasteners (UNS N07750 / W.Nr. 2.4669). As a precipitation-hardenable nickel-chromium alloy, X-750 is highly prized for its exceptional corrosion resistance and high strength, maintaining structural integrity and resisting relaxation at elevated temperatures up to 1300°F (704°C).
■ Complete Range of Inconel X-750 Fasteners
We supply a fully traceable range of age-hardened Alloy X-750 fastening components tailored for extreme environments. Click on specific categories below for detailed dimension tables and individual specifications (Links updating soon).
| Bolts & Screws | Nuts & Washers | Studs & Rods |
|---|---|---|
| Hex Bolts / Heavy Hex Bolts | Hex Nuts / Heavy Hex Nuts | Fully Threaded Studs |
| Socket Head Cap Screws | 12-Point Nuts / Lock Nuts | Double Ended Studs |
| 12-Point Flange Bolts | Flat Washers / Spring Washers | Threaded Rods / Tie Rods |
| Countersunk Screws / Set Screws | Dome Nuts / Square Nuts | Custom CNC Machined Studs |
■ Inconel Alloy X-750 Material Specifications
| Material Equivalent Grades | UNS N07750 | W.Nr. 2.4669 | Alloy X-750 | NiCr15Fe7TiAl | AFNOR NC15FeT |
|---|---|
| Standard Specifications | ASTM B637 / ASME SB637 (Precipitation Hardening Alloy) AMS 5667 / AMS 5668 / AMS 5671 (Aerospace Specs) |
| Size Range | Metric: M3 to M60 | Imperial: 1/4" to 4" (Custom dimensions engineered to print) |
| Thread Types | Metric Coarse, Metric Fine, UNC, UNF, BSW, BSF |
| Dimensions Standards | DIN, ISO, UNI, CSN, EN, BS, ANSI/ASME (e.g., ASME B18.2.1, B18.2.2) |
■ Chemical Composition of Alloy X-750
Alloy X-750 achieves its high tensile and creep-rupture properties through a carefully controlled age-hardening process driven by the additions of Titanium (Ti) and Aluminum (Al) to the nickel-chromium base.
| Ni (Nickel) | Cr (Chromium) | Fe (Iron) | Ti (Titanium) | Al (Aluminum) | Nb + Ta (Niobium) | Mn (Manganese) | C (Carbon) |
|---|---|---|---|---|---|---|---|
| 70.0% Min | 14.0 - 17.0% | 5.0 - 9.0% | 2.25 - 2.75% | 0.40 - 1.00% | 0.70 - 1.20% | 1.0% Max | 0.08% Max |
■ Mechanical & Physical Properties (Age-Hardened)
Note: Mechanical properties can vary based on the specific heat treatment cycle (e.g., AMS 5667 vs. AMS 5668). Below are typical minimums for age-hardened material.
| Tensile Strength (Min) | Yield Strength 0.2% Offset (Min) | Elongation (%) | Hardness (Rockwell) | Density |
|---|---|---|---|---|
| 1137 MPa (165 ksi) | 724 MPa (105 ksi) | 20% Min | 30 - 40 HRC | 8.28 g/cm³ (0.299 lb/in³) |
■ Standard Product Pages
Explore our dedicated standard pages for specific fastener categories to view detailed dimensions, availability, and specific technical data:
- Inconel X-750 Bolts: Comprehensive range of heavy hex, flange, and socket head configurations.
- Inconel X-750 Nuts: View our dedicated page for standard hex, heavy hex, and prevailing torque locknuts.
- Inconel X-750 Studs: Fully threaded, double-ended, and custom machined tie rods for high-pressure joints.
■ Torque & Installation Guidelines (UNC Threads)
To proactively counteract galling and achieve an accurate, highly predictable tension-to-torque relationship, the application of engineered high-temperature nickel-compatible anti-seize lubricants is functionally mandatory during assembly.
| Nominal Diameter | Threads Per Inch (UNC) | Target Torque – Dry (ft-lbs) | Target Torque – Lubricated (ft-lbs) |
|---|---|---|---|
| 1/2" | 13 | 93.0 | 70.0 |
| 5/8" | 11 | 185.0 | 139.0 |
| 3/4" | 10 | 327.0 | 245.0 |
| 1" | 8 | 795.0 | 596.0 |
■ Key Characteristics & Applications
Inconel X-750 is widely recognized for its resistance to chloride-ion stress-corrosion cracking and its excellent relaxation resistance. This makes it particularly useful for springs and highly stressed fasteners that must retain their clamping force over long periods at elevated temperatures.
- Aerospace & Gas Turbines: Rotor blades, wheels, thrust reversers, and high-strength hot-section fasteners.
- Nuclear Engineering: Reactor core components and springs due to excellent resistance to high-purity water stress-corrosion cracking.
- Industrial & Power Generation: Large pressure vessels, heat-treating fixtures, and forming tools.
- Springs & Bellows: Highly specified for high-temperature spring applications due to superior relaxation resistance.
