Hastelloy X

Hastelloy X is a nickel-based superalloy known for its exceptional high-temperature strength and oxidation resistance. It belongs to the Hastelloy family of alloys, which are renowned for their outstanding corrosion resistance and mechanical properties in extreme environments.

Applicable Standards for Hastelloy X(UNS N06002)

Base ShapeCommon Size SpecificationsApplicable StandardPayment MethodsStock Location
SheetThickness: 0.5-3.0 mm, Width: 1000mmASTM B435T/T, L/CShanghai
PlateThickness: 5-50 mm, Width: 1000-2000mmASTM B572T/T, L/CShanghai
Round BarDiameter: 10-200 mm, Length: 2000-6000mmASTM B572T/T, L/CShanghai
Square BarSide Length: 10-150 mm, Length: 2000-6000mmASTM B572T/T, L/CShanghai
Hexagonal BarAcross Flats: 10-150 mm, Length: 2000-6000mmASTM B572T/T, L/CShanghai



All About Hastelloy X Alloy: Composition, Properties, and Applications

Applications of Hastelloy X (UNS N06002)

Hastelloy X (UNS N06002) is a nickel-based superalloy known for its exceptional high-temperature strength, oxidation resistance, and corrosion resistance. Due to these unique properties, Hastelloy X finds applications in various specialized industries and environments where other alloy steels may not perform as effectively. Here are some specific applications where Hastelloy X stands out:

  1. Gas Turbine Engine Components: Hastelloy X is widely used in the aerospace industry for manufacturing components of gas turbine engines, including combustion chambers, afterburner parts, and turbine blades. Its excellent high-temperature strength and oxidation resistance make it suitable for withstanding the extreme conditions inside jet engines.

  2. Industrial Furnaces: Hastelloy X is used in the construction of industrial furnaces, including radiant tubes, furnace rolls, and heat-treating fixtures. Its high-temperature strength and resistance to oxidation make it ideal for maintaining structural integrity and prolonging the lifespan of furnace components.

  3. Nuclear Reactors: Hastelloy X is utilized in the nuclear industry for manufacturing components in nuclear fuel reactors, such as reactor cores, control rod housings, and fuel element spacers. Its corrosion resistance and mechanical properties under high neutron flux and radiation exposure conditions make it a preferred choice for nuclear applications.

  4. Chemical Processing: Hastelloy X is employed in chemical processing plants for fabricating high-temperature reaction vessels, catalyst support grids, and piping systems. Its resistance to a wide range of corrosive chemicals, including acids, alkalis, and organic compounds, makes it suitable for handling aggressive chemical environments.

  5. Pollution Control Equipment: Hastelloy X is used in pollution control equipment, such as scrubbers and stack liners, in industries dealing with emissions control and waste treatment. Its corrosion resistance and durability under harsh operating conditions make it effective in reducing environmental pollution.

  6. Supersonic Aircraft Components: Hastelloy X has been used in the aerospace sector for manufacturing components of supersonic aircraft, including engine parts, structural components, and exhaust systems. Its ability to maintain mechanical properties at high speeds and temperatures makes it suitable for supersonic flight applications.

  7. High-Performance Automotive Components: Hastelloy X can be found in high-performance automotive applications, including exhaust systems, turbocharger components, and engine parts in racing cars and high-end vehicles. Its high-temperature strength and durability make it a preferred material for performance-oriented automotive components.

In summary, Hastelloy X (UNS N06002) offers exceptional performance in specialized applications that require high-temperature strength, oxidation resistance, and corrosion resistance, distinguishing it from other alloy steels. Its unique combination of properties makes it a versatile material for demanding industries such as aerospace, nuclear, chemical processing, and high-performance automotive sectors.

Chemical composition of Hastelloy X (UNS N06002)(%)

ElementComposition (%)
Nickel (Ni)~47
Chromium (Cr)~22
Iron (Fe)~18.5
Molybdenum (Mo)~9
Cobalt (Co)~1.5
Tungsten (W)~0.6-1.0
Carbon (C)≤0.10
Manganese (Mn)≤1.0
Silicon (Si)≤1.0
Phosphorus (P)≤0.04
Sulfur (S)≤0.03
Aluminum (Al)~0.5-2.5
Titanium (Ti)~0.15-0.60
Boron (B)~0.01-0.06

Physical properties of Hastelloy X (UNS N06002)

Density (g/cm³)~8.22
Melting Point (°C)1260-1370
Thermal Conductivity (W/m·K)10.3
Specific Heat (J/kg·K)418
Electrical Resistivity (μΩ·cm)120
Modulus of Elasticity (GPa)210
Coefficient of Thermal Expansion (10^-6/°C)12.3

Mechanical properties of Hastelloy X (UNS N06002)

Mechanical PropertyValue (Typical for Room Temperature)Unit
Tensile Strength690 – 790MPa
Yield Strength (0.2% Offset)310 – 450MPa
Elongation45 – 60%
Hardness (Rockwell B)89 – 100
Reduction of Area50 – 60%


FAQs about Hastelloy X (UNS N06002)

Hastelloy material is a series of nickel-based alloys renowned for their exceptional corrosion resistance and high-temperature strength. These alloys typically contain a combination of elements such as nickel, chromium, molybdenum, as well as iron, cobalt, tungsten, and others to enhance specific properties. Known for their ability to perform under extreme conditions, Hastelloy alloys are widely used in industries like chemical processing, oil and gas, aerospace, and power generation due to their resistance to a variety of corrosive chemicals and acidic environments.

Hastelloy X is an Fe-Ni-Cr based solid-solution-strengthened alloy that exhibits moderate strength and good creep resistance at high temperatures up to 900°C. The primary applications for Hastelloy X include:

  • Components for aviation engine combustion chambers
  • Parts for industrial furnaces and gas turbines, such as burners, straighteners, and casings
  • High-temperature components in gas-cooled nuclear reactors
  • Spiral tubes in petrochemical furnaces
  • Support rolls, grid plates, ribbons, and radiation tubes, among others Its combination of oxidation resistance, corrosion resistance, and good formability and weldability at high temperatures makes it an ideal material for service in extreme environments.

Inconel 625 and Hastelloy X are both nickel-based superalloys, but they differ in their chemical composition, mechanical properties, weldability, applications, and cost:

  • Chemical Composition: Inconel 625 has higher chromium and molybdenum content, while Hastelloy X contains iron, chromium, nickel, molybdenum, cobalt, and tungsten.
  • Mechanical Properties: Inconel 625 offers better mechanical properties at lower temperatures, whereas Hastelloy X maintains its strength and oxidation resistance at elevated temperatures.
  • Weldability: Both alloys are weldable, but Hastelloy X may require specialized welding materials and techniques.
  • Applications: Inconel 625 is commonly used in marine and chemical processing environments, while Hastelloy X is suited for high-temperature and extreme corrosion conditions.
  • Cost: Inconel 625 is generally more cost-effective than Hastelloy X.

Hastelloy X and Hastelloy C are different nickel-based alloys with distinct chemical compositions and properties:

  • Chemical Composition: Hastelloy C typically has higher levels of chromium and molybdenum, while Hastelloy X contains iron, chromium, nickel, molybdenum, cobalt, and tungsten.
  • Corrosion Resistance: Hastelloy C is particularly adept at resisting pitting and crevice corrosion, whereas Hastelloy X excels in high-temperature oxidation and corrosion resistance.
  • Applications: Hastelloy C is mainly used in chemical and petrochemical equipment, especially where corrosive chemicals and acidic environments are concerned. Hastelloy X, on the other hand, is suitable for high-temperature environments and extreme corrosion conditions.
  • Performance: Hastelloy C offers excellent corrosion resistance at room temperature, while Hastelloy X maintains its properties under high-temperature service.

In summary, while both Hastelloy X and Hastelloy C are part of the Hastelloy family, they are designed for and suited to different working environments and performance requirements. The choice between the two depends on the specific application needs and performance objectives.


In conclusion, Hastelloy X is a highly specialized alloy known for its exceptional attributes, including excellent high-temperature strength, remarkable resistance to a variety of corrosive environments, and good weldability. Its extensive use across different sectors, especially those that operate under extreme conditions or where there is exposure to aggressive chemicals, underscores its superior engineering qualities.

Thank you for reading our overview of Hastelloy X. We hope this information has provided you with a clear understanding of what Hastelloy X is and its applications. If you are seeking suppliers or manufacturers of Hastelloy X online, we recommend reaching out to Huaxiao Alloy.

Huaxiao Alloy, a prominent supplier of Hastelloy Alloys based in Shanghai, China, provides customers with a range of high-quality Hastelloy products. Their offerings include not just Hastelloy X, but also other premium alloys such as and Hastelloy C276Hastelloy C2000, and Hastelloy B2 at a very competitive price.

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