Inconel X-750 Supplier & Manufacturer

Inconel X-750 (UNS N07750, W.Nr. 2.4669) is a precipitation-hardenable nickel-chromium alloy strengthened by aluminum and titanium additions. The alloy provides excellent high-temperature strength, oxidation resistance, and corrosion resistance while maintaining good mechanical properties up to approximately 700°C.

Because of its superior creep resistance, fatigue strength, and stress-rupture performance, Inconel X-750 is widely used in aerospace engines, gas turbines, nuclear reactors, springs, fasteners, and high-temperature structural components.

J&A Alloy supplies Inconel X-750 in bar, rod, plate, sheet, wire, forgings, rings, and custom-machined components.

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Key Features of Inconel X-750

Excellent High-Temperature Strength

Maintains mechanical properties at elevated temperatures up to approximately 700°C.

Outstanding Oxidation Resistance

Provides long-term protection in high-temperature oxidizing environments.

Exceptional Fatigue Resistance

Ideal for cyclic loading applications such as springs and rotating equipment.

Excellent Creep and Stress-Rupture Strength

Widely used for turbine and aerospace components.

Good Corrosion Resistance

Resists many industrial and atmospheric corrosion environments.

Precipitation-Hardened Alloy

Can be heat-treated to achieve high strength levels.

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Chemical Composition of Inconel X-750

Element	Content (%)
Nickel (Ni)	≥ 70.0
Chromium (Cr)	14.0 – 17.0
Iron (Fe)	5.0 – 9.0
Titanium (Ti)	2.25 – 2.75
Aluminum (Al)	0.40 – 1.00
Niobium + Tantalum (Nb+Ta)	0.70 – 1.20
Manganese (Mn)	≤ 1.00
Silicon (Si)	≤ 0.50
Carbon (C)	≤ 0.08
Sulfur (S)	≤ 0.01
Copper (Cu)	≤ 0.50
Cobalt (Co)	≤ 1.00

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Mechanical Properties of Inconel X-750

Property	Value
Tensile Strength	≥ 1100 MPa
Yield Strength (0.2% Offset)	≥ 790 MPa
Elongation	≥ 20%
Hardness	24 – 35 HRC
Density	8.28 g/cm³
Melting Range	1393 – 1427°C
Modulus of Elasticity	214 GPa
Thermal Conductivity	11.7 W/m·K

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Corrosion Resistance

Inconel X-750 offers excellent resistance to:

• Oxidation at elevated temperatures
• Atmospheric corrosion
• Steam environments
• Seawater splash exposure
• Chloride-containing environments
• Mild acids and alkalis

The alloy performs particularly well in high-temperature oxidation service.

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High Temperature Performance

One of the main advantages of Inconel X-750 is its ability to retain strength at elevated temperatures.

Temperature Capabilities

• Continuous service up to approximately 700°C
• Excellent stress-rupture strength
• Outstanding creep resistance
• Good thermal fatigue resistance
• Excellent oxidation resistance

These characteristics make it suitable for gas turbines and aerospace engines.

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Available Forms

J&A Alloy supplies Inconel X-750 in:

• Round Bar
• Rod
• Plate
• Sheet
• Coil
• Strip
• Wire
• Spring Wire
• Pipe
• Tube
• Forgings
• Rings
• Fasteners

Custom dimensions available.

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Applications of Inconel X-750

Aerospace

• Jet engine components
• Turbine blades
• Structural fasteners
• Exhaust systems

Gas Turbines

• Turbine bolts
• Retaining rings
• Combustion hardware

Nuclear Industry

• Reactor springs
• Control rod components

Industrial Heating

• Heat treatment fixtures
• High-temperature fasteners

Oil & Gas

• Downhole springs
• High-temperature sealing systems

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Inconel X-750 vs Inconel 718

Property	Inconel X-750	Inconel 718
UNS Number	N07750	N07718
Strength	Very High	Excellent
Tensile Strength	≥ 1100 MPa	≥ 1275 MPa
Yield Strength	≥ 790 MPa	≥ 1035 MPa
Creep Resistance	Excellent	Very Good
Oxidation Resistance	Excellent	Excellent
Fatigue Resistance	Excellent	Excellent
Weldability	Good	Better
Spring Applications	Excellent	Good
Aerospace Components	Extensive	Extensive
Cost	Moderate	Higher

Choose Inconel X-750 When

• Spring applications are involved
• Stress-rupture resistance is critical
• Long-term elevated temperature service is required

Choose Inconel 718 When

• Maximum structural strength is required
• Heavy aerospace load-bearing components are involved

Welding & Fabrication

Inconel X-750 can be fabricated using conventional nickel alloy practices.

Welding Methods

• GTAW (TIG)
• GMAW (MIG)
• SMAW

Fabrication Notes

• Good hot and cold working characteristics
• Heat treatment required for optimum properties
• Suitable filler metals should be selected

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Standards & Equivalent Grades

Standard	Grade
UNS	N07750
W.Nr.	2.4669
ASTM	B637
ASME	SB637
AMS	5542
AMS	5598
AMS	5698
AMS	5699
ISO	15156 (Certain Applications)
Common Trade Name	Inconel X-750 / Alloy X-750