Hastelloy® X Foil

Hastelloy® X Foil is a nickel-chromium-iron-molybdenum alloy foil form known for its outstanding oxidation resistance and mechanical stability at high temperatures. Its thin and flexible geometry makes it particularly suitable for aerospace, nuclear, and energy systems where both lightweight design and thermal resilience are required. The foil is widely employed in gas turbine components, reactor claddings, and high-temperature seals. Specific technologies benefiting from Hastelloy® X foil include brazed honeycomb liners in turbine engines, where the foil structure bonded with nickel-silicon filler provides abrasion resistance and durability; laser-based welding and joining processes, such as Yb:YAG and CO₂ laser welding, which deliver precision and minimize cracking during fabrication of ultra-thin superalloy components; and creep-relaxation studies, where foil specimens enable detailed evaluation of long-term high-temperature performance under realistic reactor and energy system conditions. In research, Hastelloy® X foils serve as a platform for microstructural studies, welding optimization, and performance evaluation in advanced reactors. By uniting corrosion resistance, high-temperature strength, and processability, Hastelloy® X Foil continues to play a pivotal role in scientific innovation and high-performance engineering.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Foil

Thickness	<0.01mm	±25%
Thickness	0.01mm - 0.05mm	±25%
Thickness	>0.05mm	±10%

Material Properties for Alloys

Magnetic Properties

Element	Value
Initial permeability	1.002

Mechanical Properties

Element	Value
Elongation at break( % )	<46
Tensile strength( MPa )	740-760

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	118
Temperature coefficient( K⁻¹ )	-

Thermal Properties

Element	Value
Melting point( C )	1260-1355
Specific heat( J K⁻¹ kg⁻¹ )	486@23°C
Thermal conductivity( W m⁻¹ K⁻¹ )	9.1@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	13@25-100°C