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Inconel X750
Inconel X-750 / Alloy X-750 / Nickel Alloy X-750 / N07750 / 2.4669 / NiCr15Fe7TiAl / GH4145 (China); also commonly referred to as a precipitation-hardenable nickel-chromium superalloy.
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Category
Nickel Alloy
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Grade
Inconel X-750 / UNS N07750 / 2.4669
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Standard
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Product Form
ASTM B637 / AMS 5667 / AMS 5698 / AMS 5542
Spring Wire / Bar / Rod / Forged Ring / Sheet / Strip / Coil / Bolts / Fasteners / Turbine Components
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Thickness
0.5–100 mm
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Width
1000–2500 mm
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Length
2000–6000 mm
Features
Inconel X-750 is a precipitation-hardenable nickel-chromium alloy designed to provide high mechanical strength, good corrosion resistance and excellent performance at elevated temperatures. Additions of titanium and aluminum enable precipitation strengthening through controlled heat treatment.
The alloy offers excellent resistance to oxidation and maintains useful tensile, creep and stress-rupture properties during prolonged high-temperature exposure. Its nickel-chromium base also provides good corrosion resistance in a wide range of industrial environments.
One of the important advantages of Inconel X-750 is its resistance to relaxation at elevated temperatures. This makes the alloy particularly suitable for springs, bolts, fasteners and other components that must maintain mechanical loading during prolonged thermal exposure.
Inconel X-750 is widely used in gas turbines, aircraft engines, nuclear equipment and rocket-engine systems. Typical components include high-temperature springs, turbine rotor parts, seals, bolts, fasteners and other highly stressed components.
Surface Finish | Bright / Pickled / Ground / Polished / Machined |
Technique | Hot Rolled / Cold Drawn / Forged / Solution Treated / Age Hardened / Machined |
Applications | Gas Turbines, Aircraft Engines, High-Temperature Springs, Turbine Rotors, Fasteners, Nuclear Components, Rocket Engines, Pressure Vessels |
Excellent high-temperature strength
Precipitation-hardening capability
Excellent creep resistance
Good stress-rupture strength
Excellent resistance to stress relaxation
Good oxidation resistance
Good corrosion resistance
Good fatigue performance
Suitable for high-temperature springs
Widely used in aerospace and gas turbines
Chemical Composition (%)
Mechanical Properties (Typical)
Element | Composition (%) |
Ni + Co | ≥ 70.0 |
Cr | 14.0–17.0 |
Fe | 5.0–9.0 |
Ti | 2.25–2.75 |
Al | 0.40–1.00 |
Nb + Ta | 0.70–1.20 |
Co | ≤ 1.00 |
Mn | ≤ 1.00 |
Si | ≤ 0.50 |
Cu | ≤ 0.50 |
C | ≤ 0.08 |
S | ≤ 0.010 |
Typical Room-Temperature Properties — Age-Hardened Condition
Property | Typical Value |
Tensile Strength | Approx. 1,100–1,400 MPa |
Yield Strength (0.2%) | Approx. 700–1,100 MPa |
Elongation | Approx. 10–25% |
Hardness | Approx. 300–400 HB |
Density | Approx. 8.28 g/cm³ |
Melting Range | Approx. 1393–1427°C |
Mechanical properties may vary significantly depending on product form, dimensions, heat-treatment condition, and applicable material specification.
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