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Grade: AISI 321
Formula: Fe/Cr 18/Ni 9/Ti
Form: Foil/Film/Sheet
Material: Stainless Steel
Commodity: Alloys
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.
Tolerances
Foil
| Thickness | <0.01mm | ±25% |
|---|---|---|
| Thickness | 0.01mm - 0.05mm | ±25% |
| Thickness | >0.05mm | ±10% |
Material Properties for Alloys
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 |
Other Customers Purchased
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Nickel/Iron/Molybdenum Alloy Foil (Light Tight) (Ni80/Fe15.5/Mo4.5) Formula: Ni80/Fe15.5/Mo 4.5
Temper: Annealed
Thickness: 1mm
Length 1: 50mm
Length 2: 50mm
UOM Code: 016-589-98
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Gold Plated AISI 304 Stainless Steel Spooled Wire Formula: Fe/Cr18/Ni10
Product Shape: Spooled
Diameter: 0.05mm
Length: 100m
Temper: Annealed
Coating: Gold Plated coated
UOM Code: 128-822-05
eachStarting at $254.00
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Nickel/Iron/Molybdenum Alloy Foil (Ni80/Fe15.5/Mo4.5) Formula: Ni80/Fe15.5/Mo 4.5
Temper: Annealed
Thickness: 1mm
Length 1: 100mm
Length 2: 100mm
UOM Code: 686-497-48
eachStarting at $123.00
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Titanium Dioxide Sheet Formula: TiO₂ 99.6%
Thickness: 2mm
Length 1: 25mm
Length 2: 25mm
CAS Number: 13463-67-7
UOM Code: 625-195-31
eachStarting at $690.00
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Super Duplex Stainless Steel Rod Formula: Fe/Cr25/Ni 7/Mo 4
Diameter: 12.7mm
Length: 500mm
Temper: Annealed
UOM Code: 031-402-99
eachStarting at $244.00
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Nitronic® 60 Stainless Steel Rod Formula: Fe62.4/Cr17/Ni 8.5/Mn 8/Si 4
Diameter: 38.1mm
Length: 25mm
Temper: Annealed
Production Method: Centreless Ground
UOM Code: 065-530-21
eachStarting at $394.00
Discounts applied for volume purchases
