Inconel 751 (Ni-15Cr-2.5Ti-1.0Al-7Fe) aged vs Inconel X 750
Property comparison of Inconel 751 (Ni-15Cr-2.5Ti-1.0Al-7Fe) aged and Inconel X 750, both nickel alloy.
| Property | Inconel 751 (Ni-15Cr-2.5Ti-1.0Al-7Fe) aged | Inconel X 750 | Difference |
|---|---|---|---|
| Yield strength | 875 MPa | 1,000 MPa | +14% |
| Tensile strength | 1,275 MPa | 1,172 MPa | -8% |
| Elongation | 25 % | 20 % | -20% |
| Density | 8,220 kg/m³ | 8,280 kg/m³ | +1% |
| Thermal conductivity | 12 W/m·K | 12 W/m·K | 0% |
| Coefficient of thermal expansion | 0.000013 1/K | 0.000012 1/K | -4% |
| Melting point | 1,413 °C | 1,427 °C | +1% |
Difference is Inconel X 750 relative to Inconel 751 (Ni-15Cr-2.5Ti-1.0Al-7Fe) aged. Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- grade
- N07751
- standard
- Special Metals Corp. tech bulletin INCONEL alloy 751; AZoM ArticleID 7764
- heat treatment
- precipitation hardened
- grade
- N07750
- standard
- Special Metals Corp. tech bulletin INCONEL alloy X-750 (SMC-067); AMS 5542/5598; Aircraft Materials data
- heat treatment
- precipitation hardened (1300F/20h AC)
About Inconel nickel-chromium superalloys
Inconel is a family of nickel-chromium-iron superalloys. They keep strength at temperatures where steels and most stainless grades have failed and resist oxidation and hot corrosion. Inconel 718 is the most widely used grade for aerospace turbine disks and high-temperature fasteners; Inconel 625 is the choice when chloride and reducing-acid corrosion both matter.
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