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AISI 321 Stainless Steel Foil (Light Tight)

Formula: Fe/Cr 18/Ni 9/Ti
Form: Foil (Light Tight)
Material: AISI 321 Stainless Steel
Commodity: Alloys
Light Tight: Light Tight
AISI 321 Stainless Steel Foil (Light Tight), also known as UNS S32100, is a titanium-stabilized austenitic stainless steel renowned for its excellent resistance to intergranular corrosion and high-temperature oxidation. This specialized foil is designed to block light transmission, making it ideal for applications where light sensitivity is critical. Its light-blocking properties are essential in electronics for shielding sensitive components from light-induced degradation. In aerospace, it is used in enclosures for optical instruments, ensuring accurate measurements. Additionally, it protects light-sensitive diagnostic equipment in the medical field and is used in manufacturing containers for pharmaceuticals. The foil’s ability to maintain mechanical properties at elevated temperatures makes it suitable for high-temperature applications where blocking light is essential. Goodfellow offers premium AISI 321 Stainless Steel Foil (Light Tight) that meets stringent industry standards, ensuring optimal performance.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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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

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