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AISI 321 Stainless Steel Foil

Available Configurations

Properties common to all products in this list

Commodity: Alloys Material: Stainless Steel Form: Foil/Film/Sheet Composition: Fe/Cr18/Ni 9/Ti Grade: AISI 321 UNS Number: S32100 Coating: Uncoated Surface Finish: Standard
AISI 321 Stainless Steel Foil is a titanium-stabilized austenitic alloy optimized for resistance to intergranular corrosion, oxidation, and scaling at elevated temperatures. The foil format offers thin, precision-rolled material with high flexibility and surface quality, enabling integration into thermal management systems, chemical process equipment, and precision instrumentation. It is widely employed in aerospace, automotive, electronics, and chemical industries where high-temperature stability and corrosion protection are critical. Specific applications include flexible thermal shields, chemical-resistant gaskets, and precision diaphragms in sensors. In research and development, 321 foil is utilized for microfabrication substrates, fatigue and creep resistance testing under thermal cycling, and as a model alloy in coating and surface engineering studies. Its unique combination of mechanical stability, heat resistance, and formability secures its role in both industrial production and advanced experimental projects.
Starting at $221.00 each
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Material Properties

Mechanical Properties
Element Value
Hardness - Brinell 160-190
Elongation at break( % ) <60
Modulus of elasticity( GPa ) 190-210
Izod impact strength( J m⁻¹ ) 20-136
Tensile strength( MPa ) 560
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 70-73
Temperature coefficient( K⁻¹ ) -
Thermal Properties
Element Value
Maximum use temperature in air( C ) 800
Melting point( C ) 1400-1425
Thermal conductivity( W m⁻¹ K⁻¹ ) 16.3@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 18@20-100°C
Physical Properties
Element Value
Density( gcm⁻³ ) 7.9
each

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Available Configurations

Properties common to all products in this list

Commodity: Alloys Material: Stainless Steel Form: Foil Composition: Fe/Cr18/Ni 9/Ti Grade: AISI 321 UNS Number: S32100 Coating: Uncoated Surface Finish: Standard

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Tolerances

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