Inconel high-temperature alloy

Inconel is a high-performance nickel-based superalloy known for its exceptional resistance to high temperatures, oxidation and corrosion. The alloy is primarily composed of nickel (Ni), chromium (Cr) and iron (Fe), making it indispensable in extreme conditions such as high temperatures, pressures and aggressive chemical environments. Unlike ordinary steel, although the melting point of steel may be higher than that of nickel, it will quickly lose strength and corrosion resistance at high temperatures; nickel-chromium iron alloys can still maintain excellent mechanical properties in a hot state and form a dense protective oxide layer to effectively resist high-temperature corrosion.

With excellent mechanical strength, thermal stability and durability, Inconel is widely used in aerospace, energy, chemical and marine engineering fields.

Inconel X-750

Inconel X-750 (GH4145) is a precipitation hardening nickel-chromium alloy that is age-strengthened by the addition of elements such as aluminum and titanium. It exhibits excellent resistance to oxidation and corrosion at temperatures up to 980°C and maintains high strength below 800°C. The alloy has good resistance to relaxation up to 540°C, ensuring long-term stability in demanding applications. Due to its good plasticity and weldability, Inconel X-750 is widely used in the manufacturing of high-temperature structural parts in aerospace, energy, power and industrial equipment. Jiangsu DZX Technology Co., Ltd. provides you with factory direct sales and nationwide fast delivery services.

Precipitation-Hardenable Nickel-Chromium Alloy

Inconel X-750

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✓ COC & Test Certificates
✓ Established in 2002
✓ OEM & Custom Sizes

Inconel X-750 is a precipitation-hardenable nickel-chromium alloy, strengthened by the γ’ phase [Ni₃(Al, Ti, Nb)] for enhanced high-temperature performance. It exhibits excellent oxidation and corrosion resistance below 980°C, along with high strength retention up to 800°C. The alloy also provides good relaxation resistance below 540°C, ensuring long-term stability in demanding applications. Additionally, Inconel X-750 features good formability and weldability, making it suitable for high-temperature structural components in aerospace, power generation, and industrial applications.

Specifications

Plate / Sheet
Thickness: 0.5mm-100mm
Width: 500mm-2000mm
Length: 1000mm-6000mm
Rod
Diameter: 5mm-500mm
Length: 500mm-6000mm
Tube
Outer Diameter: 6mm-273mm
Wall Thickness: 0.5mm-50mm
Length: ≤ 12000mm
Wire
Diameter: 0.1mm-10mm
Delivery Forms: Coiled wire or straight wire

Chemical Composition

Nickel (Ni): ≥70

Chromium (Cr): 14-17

Iron (Fe): 5-9

Carbon (C): ≤0.08

Manganese (Mn): ≤1

Silicon (Si): ≤0.5

Sulfur (S): ≤0.01

Titanium (Ti): 2.25-2.75

Niobium (Nb)+ Tantalum (Ta): 0.7-1.2

Aluminum (Al): 0.4-1

Copper (Cu): ≤0.5

Cobalt (Co): ≤1

Physical & Mechanical Properties

Grade	Inconel X750
Density (g/cm³)	8.25
Melting Point (°C)	1395-1425°C
Tensile Strength (Rm N/mm²)	930
Yield Strength (Rp 0.2N/mm²)	515
Elongation at Break A5 (%)	30
Thermal Conductivity λ (W/m·℃)	14.7
Specific Heat (J/kg·°C)	214
Electrical Resistivity (μΩ·m)	1.22
Coefficient of Lines Expansion (α×10⁻⁶/20~600ºC)	13.1

Supply Capability

Item	Details
Lead Time	Samples 5-10 days; production 15-30 days
MOQ	Small trial orders accepted
Samples	Available on request
Packaging	Export-standard coil spools / wooden cases
Certificate	COC with chemical composition analysis
Payment	T/T, L/C

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Frequently Asked Questions (FAQ)

How is Inconel X-750 reinforced? What domestic brand does it correspond to?

X-750 is a precipitation hardening nickel-chromium alloy, which corresponds to GH4145 in China. It is aged-strengthened by adding aluminum 0.4-1% and titanium 2.25-2.75%, with nickel ≥70% and chromium 14-17%. After precipitation hardening, the tensile strength is about 930 N/mm² and the yield is about 515. It is a grade known for its high strength in the Inconel group.

How temperature resistant can Inconel X-750 be?

What are the implications of X-750’s anti-relaxation properties for high temperature springs?

What are the physical parameters such as density and melting point of Inconel X-750?

The density of X-750 is 8.25 g/cm³, the melting point is about 1395-1425°C; the thermal conductivity is 14.7 W/m·℃, the specific heat capacity is 214 J/kg·°C, the resistivity is 1.22 Ω·m, the linear expansion coefficient between 20 and 600°C is 13.1×10⁻⁶, and the elongation is 30%. Use this data as a reference when designing high temperature fasteners and springs.

In what fields is Inconel X-750 (GH4145) mainly used?

X-750 is widely used in high-temperature structural parts of aerospace, energy, power and industrial equipment, such as high-temperature springs, fasteners, gas turbine parts and furnace components; it has good plasticity, good weldability, and is easy to process and form. The manufacturer can supply plates, rods, tubes, and wires, and supports customized specifications.

Inconel high-temperature alloy

Inconel X-750

Precipitation-Hardenable Nickel-Chromium Alloy

Inconel X-750

Need this alloy for a demanding application?

Frequently Asked Questions (FAQ)

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