Hastelloy X Supplier & Manufacturer

Hastelloy X (UNS N06002, W.Nr. 2.4665) is a solid-solution strengthened nickel-based superalloy designed for exceptional performance in high-temperature oxidizing environments. The alloy combines high chromium, molybdenum and iron contents to provide an excellent balance of oxidation resistance, fabricability and mechanical strength.

Unlike corrosion-focused Hastelloy grades such as C-276 and C-22, Hastelloy X was specifically developed for gas turbine engines, industrial furnaces and thermal processing equipment where long-term exposure to temperatures above 1000°C is common.

J&A Alloy supplies Hastelloy X in pipe, tube, plate, sheet, bar, wire, flanges, fittings and forgings with full material certification.

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Key Features of Hastelloy X

Exceptional Oxidation Resistance

Resists oxidation up to approximately 1200°C through the formation of a stable protective oxide film.

High Temperature Strength

Maintains excellent tensile and creep properties during prolonged exposure to elevated temperatures.

Excellent Thermal Stability

Offers superior resistance to thermal fatigue and repeated heating cycles.

Outstanding Fabricability

Can be readily formed and welded using conventional nickel alloy techniques.

Good Corrosion Resistance

Performs well in oxidizing atmospheres and many industrial process environments.

Long Service Life

Designed for demanding aerospace and furnace applications.

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Chemical Composition of Hastelloy X

Element	Content (%)
Nickel (Ni)	Balance
Chromium (Cr)	20.5 – 23.0
Iron (Fe)	17.0 – 20.0
Molybdenum (Mo)	8.0 – 10.0
Cobalt (Co)	0.5 – 2.5
Tungsten (W)	0.2 – 1.0
Carbon (C)	0.05 – 0.15
Manganese (Mn)	≤ 1.00
Silicon (Si)	≤ 1.00
Sulfur (S)	≤ 0.015

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Mechanical Properties of Hastelloy X

Property	Value
Tensile Strength	≥ 655 MPa
Yield Strength (0.2%)	≥ 275 MPa
Elongation	≥ 35%
Hardness	Approx. 92 HRB
Density	8.22 g/cm³
Melting Range	1260 – 1355°C

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Corrosion Resistance

Hastelloy X provides excellent resistance to:

• High-temperature oxidation
• Carburization
• Nitriding atmospheres
• Chloride-containing combustion gases
• Thermal fatigue environments
• Moderate oxidizing chemicals

Its outstanding oxidation behavior makes it particularly suitable for gas turbine and furnace service.

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High Temperature Performance

Typical Service Characteristics

• Oxidation resistance up to approximately 1200°C
• Excellent creep rupture strength
• Superior thermal fatigue resistance
• Good structural stability
• Outstanding resistance to scaling

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Available Forms

J&A Alloy supplies Hastelloy X in:

• Pipe
• Tube
• Plate
• Sheet
• Coil
• Strip
• Round Bar
• Rod
• Wire
• Flanges
• Fittings
• Forgings

Custom machining services are available.

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Applications of Hastelloy X

Aerospace

• Combustion chambers
• Afterburner components
• Jet engine parts

Industrial Furnaces

• Retorts
• Furnace rollers
• Heat treating baskets

Petrochemical

• Process heaters
• Catalyst supports

Power Generation

• Gas turbine components
• High-temperature ducting

Thermal Processing

• Kilns
• Incinerators
• Heat exchangers

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Hastelloy X vs Inconel 625

Property	Hastelloy X	Inconel 625
UNS Number	N06002	N06625
Main Alloy System	Ni-Cr-Fe-Mo	Ni-Cr-Mo-Nb
Primary Advantage	Oxidation Resistance	Corrosion Resistance
High Temperature Strength	Excellent	Excellent
Pitting Resistance	Good	Superior
Gas Turbine Service	Excellent	Good
Weldability	Excellent	Excellent
Main Applications	Aerospace, Furnaces	Marine, Chemical Processing