Precipitation-hardened Ni-Cr alloy with Al & Ti
High creep-rupture strength to 1300°F (700°C)
Excellent relaxation resistance – ideal for springs/bolts
Oxidation resistant to 1800°F (982°C); non-magnetic
Inconel X-750 (Alloy X750 / UNS N07750) is a precipitation-hardenable nickel-chromium alloy designed for high strength, excellent oxidation resistance, and outstanding performance at elevated temperatures.
It is widely used in applications requiring resistance to high stress, the
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Key Features
- High strength through precipitation hardening
- Excellent resistance to oxidation and corrosion
- Good performance under high stress and thermal fatigue
- Outstanding relaxation resistance (ideal for springs)
- Reliable at elevated temperatures
Applications
Inconel X-750 is widely used in high-performance industries:
- Aerospace components (springs, fasteners, turbine parts)
- Gas turbines and jet engines
- Nuclear reactors
- Industrial springs and high-stress components
- Pressure vessels and heat exchangers
Not sure if this alloy fits your application?
Read: inconel-x750-applications
Related Products:
Hastelloy C276
Incoloy 825
Inconel 625
Learn more about real-world usage in our guide:
- Inconel 600 VS Inconel 625
- Hastelloy C22 vs C276 Comparison
Hastelloy c2000-guide - Inconel 718 Properties
- Incoloy 800 VS Inconel 600
- Inconel X-750 VS Inconel 718
For a broader overview, see our guide on what are nickel alloys
FAQ
What is Inconel X-750 used for?
It is commonly used for springs, aerospace components, and high-temperature fasteners.
Is Inconel X-750 heat resistant?
Yes, it maintains strength and oxidation resistance at elevated temperatures.
What is UNS N07750?
UNS N07750 is the material designation for Inconel X-750.
Why is Inconel X-750 used for springs?
Because of its excellent relaxation resistance and ability to maintain strength under stress and heat.
Chemical composition
% | Ni | Cr | Fe | C | Mn | Si | S | Ti | Nb+Ta | Al | Co | Cu |
min | 70.0 | 14.0 | 5.0 | 2.25 | 0.70 | 0.40 | ||||||
max | 17.0 | 9.0 | 0.08 | 1.00 | 0.50 | 0.010 | 2.75 | 1.20 | 1.00 | 1.00 | 0.50 |
Note: Inconel is a registered trademark of the Special Metals Corporation group of companies.
Item | Inconel 600 | Inconel 601 | Inconel 617 | Inconel 625 | Inconel 690 | Inconel 718 | Inconel X750 | Inconel 825 |
C | ≤0.15 | ≤0.1 | 0.05-0.15 | ≤0.08 | ≤0.05 | ≤0.08 | ≤0.08 | ≤0.05 |
Mn | ≤1 | ≤1.5 | ≤0.5 | ≤0.35 | ≤0.5 | ≤0.35 | ≤1 | ≤1 |
Fe | 6-10 | rest | ≤3 | rest | 7-11 | rest | 5-9 | ≥22 |
P | ≤0.015 | ≤0.02 | ≤0.015 | — | — | — | — | — |
S | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.01 | ≤0.01 | ≤0.03 |
Si | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.35 | ≤0.5 | ≤0.35 | ≤0.5 | ≤0.5 |
Cu | ≤0.5 | ≤1 | — | ≤0.3 | ≤0.5 | ≤0.3 | ≤0.5 | 1.5-3 |
Ni | ≥7.2 | 58-63 | ≥44.5 | 50-55 | ≥58 | 50-55 | ≥70 | 38-46 |
Co | — | — | 10-15 | ≤10 | — | ≤1 | ≤1 | — |
Al | — | 1-1.7 | 0.8-1.5 | ≤0.8 | — | 0.2-0.8 | 0.4-1 | ≤0.2 |
Ti | — | — | ≤0.6 | ≤1.15 | — | — | 2.25-2.75 | 0.6-1.2 |
Cr | 14-17 | 21-25 | 20-24 | 17-21 | 27-31 | 17-21 | 14-17 | 19.5-23.5 |
Nb+Ta | — | — | — | 4.75-5.5 | — | 4.75-5.5 | 0.7-1.2 | — |
Mo | — | — | 8-10 | 2.8-3.3 | — | 2.8-3.3 | — | 2.5-3.5 |
B | — | — | ≤0.006 | — | — | — | — | — |
Alloy | ASTM | DIN | BS | AFNOR | GB | |
|---|---|---|---|---|---|---|
New grades | Old grades | |||||
| Inconel 600 | UNS N06600 | 2.4816 / NiCrl 5Fe | NA14 | NC15FE | NS3102 | NS312 |
| Inconel 601 | UNS N06601 | 2.4851 / NiCr23Fe | NC23FeA | NS3103 | NS313 | |
| Inconel 625 | UNS N06625 | 2.4856 / NiCr22Mo9Nb | NA21 | NC 22 DNb | NS3306 | NS336 |
| Inconel 718 | UNS N07718 | 2.4668 / NiCr19Fe19Nb5Mo3 | NA 51 | NC19FeNb | GH4169 | GH4169 |
| Inconel X-750 | UNS N07750 | 2.4669 / NiCr15Fe7TiAl | NC15TNbA | GH4145 | GH4145 | |
| Inconel 725 | UNS N07725 | |||||
