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| Property | Value |
|---|---|
| UNS Number | N07750 |
| ASTM/ASME Standard | ASTM B637 / SB-637 |
| Tensile Strength | 1240 MPa min |
| Yield Strength | 825 MPa min |
| Density | 8.28 g/cm³ |
| Max Service Temperature | 700°C |
| Element | Composition (%) |
|---|---|
| Ni+Co | ≥70.0 |
| Cr | 14.0–17.0 |
| Fe | 5.0–9.0 |
| Ti | 2.25–2.75 |
| Al | 0.40–1.0 |
| Nb+Ta | 0.70–1.20 |
| C | ≤0.08 |
Inconel X-750 is a nickel-chromium alloy strengthened with additions of titanium, aluminum, and niobium, which promote the formation of gamma-prime precipitates during aging. Chromium content, typically around 15-16%, imparts excellent oxidation and corrosion resistance, while nickel provides a stable austenitic matrix. The precipitation-hardening elements enable significant strengthening through controlled heat treatment, allowing the alloy to achieve high tensile and yield strength without sacrificing ductility.
These characteristics make Inconel X-750 fasteners exceptionally suited for high-temperature and corrosive service environments, including aerospace, gas turbine, and nuclear applications. The alloy retains strength and resists stress relaxation up to 700°C, while offering outstanding resistance to oxidation, chloride-induced corrosion, and creep. Its combination of high strength, excellent fatigue resistance, and dimensional stability under thermal cycling ensures reliable fastener performance in demanding structural and mechanical assemblies where conventional stainless steels would fail.
Specifications
Inconel X-750 Fasteners are nickel-chromium alloy components defined by high-temperature mechanical properties, corrosion resistance, and precise dimensional specifications. Their technical data typically covers tensile strength, hardness, thread sizes, fastening tolerances, and applicable standards, making them suitable for demanding aerospace and industrial applications.
| Property | Value |
|---|---|
| Tensile Strength | 1240 MPa min |
| Yield Strength (0.2% Offset) | 825 MPa min |
| Elongation | 20% min |
| Hardness | 35 HRC max |
| Modulus of Elasticity | 214 GPa |
| Thermal Expansion (20-100°C) | 12.6 µm/m·°C |
| Thermal Conductivity | 12.0 W/m·K |
| Density | 8.28 g/cm³ |
| Melting Range | 1393-1427°C |
| Heat Treatment | Solution + Age Hardened |
| Max Service Temperature | 700°C |
| Specification | Details |
|---|---|
| Bolt Standard | ASME B18.2.1, ASTM B637 |
| Stud Bolt Standard | ASME B18.31.3 |
| Nut Standard | ASME B18.2.2 |
| Washer Standard | ASME B18.22.1 |
| Thread Form | UNC, UNF, Metric |
| Diameter Range | M6 to M64 / 1/4" to 2.5" |
| Length Range | 10mm to 500mm |
| Available Forms | Bolts, Studs, Nuts, Washers, Screws |
| Custom Sizes | Available on request |
| Manufacturing Standard | ASTM B637 / AMS 5667 |
| Inspection Standard | NACE MR0175, EN 10204 3.1 |
Applications
