Inconel X-750 | UNS N07750

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

Inconel X-750 Wire and Spring Wire

Inconel X-750 wire is widely requested for high-temperature springs, clips, lock wire, formed parts and components where relaxation resistance and strength retention are important. For quotation, confirm wire diameter, coil or spool requirement, temper, tensile strength, heat treatment condition, surface finish and inspection requirement.

Wire Requirement	What to Specify	Why It Matters
Spring wire	Diameter, coil/spool, temper, tensile strength and spring drawing.	Spring performance depends on cold work, aging condition and final design.
High-temperature wire parts	Service temperature, load, relaxation requirement and inspection.	X-750 is often selected where hot strength and relaxation resistance are required.
Custom wire supply	Quantity, tolerance, surface finish, packing and destination country.	These details affect availability, lead time and quotation accuracy.

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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Inconel X-750 Heat Treatment and Standards

Inconel X-750 properties depend on solution treatment, cold work and age hardening. Buyers should confirm whether the requirement is for bar, wire, sheet or spring material, and whether the project references AMS, ASTM or a customer drawing.

Requirement	Common Reference	RFQ Notes
Bar / forging stock	AMS 5667, AMS 5668, ASTM/project specification	Confirm diameter, heat treatment condition, mechanical properties and UT.
Wire / spring wire	AMS 5698, AMS 5699 or customer specification	Confirm wire diameter, temper, tensile strength, coil/spool and aging requirement.
Sheet / strip	AMS/ASTM/project specification	Confirm thickness, width, condition, surface and flatness requirement.

Inconel X-750 Spring, Wire and Heat Treatment Buying Notes

For X-750 wire and spring wire, buyers should confirm spring temper, age-hardened condition, tensile strength range, relaxation requirement, diameter, coil or spool, surface finish and inspection scope. For dedicated wire RFQ details, see Inconel X-750 Wire Supplier.

Requirement	Common Buyer Intent	RFQ Detail
Spring wire	High-temperature spring or clip performance	Confirm wire diameter, coil/spool, tensile range and final aging condition.
Bar / fastener stock	Hot fasteners, bolts and mechanical parts	Confirm diameter, length, heat treatment and mechanical property requirement.
AMS / ASTM / project spec	Specification-controlled aerospace or industrial purchase	Send exact standard, revision, condition and inspection requirement.

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

Related hub: Nickel-Base High-Temp Alloy Products. Related landing page prepared for publication: Inconel X-750 Wire Supplier.

Inconel X-750 Internal Selection Links

Related pages: Inconel X-750 Wire Supplier, Nickel-Base High-Temp Alloy Products, Aerospace Alloys, Power Generation Alloys, Inconel 718, Incoloy A286 and Nimonic 80A.