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AISI 302 Stainless Steel Foil (Light Tight)
Available Configurations
Properties common to all products in this list
Key Features
AISI 302 Stainless Steel Foil (Light Tight) (UNS S30200) is an austenitic stainless steel in precision thin-sheet form with 17-19% chromium and 8-10% nickel, engineered to be completely free of pinholes to ensure total blockage of external light transmission:
Total Blockage of External Light Transmission
Engineered to be completely free of pinholes, this foil ensures total blockage of external light transmission, providing a reliable optical barrier for sensitive optical and photonic applications.
Improved Cold-Worked Strength vs. AISI 304
The higher carbon content of AISI 302 relative to AISI 304 provides improved cold-worked strength, giving this light-tight foil a meaningful mechanical advantage where structural performance matters alongside optical isolation.
Excellent Corrosion Resistance Across a Wide Temperature Range
Excellent corrosion resistance and retained ductility across a wide temperature range support reliable performance of this light-tight foil in aerospace, photonics, and advanced electronics applications.
Suited to Radiation-Shielding & Hermetic Enclosures
Optically sealed housings, radiation-shielding laminates, and photochemical reaction enclosures benefit from the combination of complete light exclusion and reliable corrosion resistance characteristic of this foil.
Combined Optical Isolation & Mechanical Load-Bearing
This foil is suited to applications where light exclusion is critical alongside meaningful mechanical load-bearing, including hermetic optical sensor enclosures and precision diaphragms in spectroscopic instruments.
Industrial Applications
AISI 302 Stainless Steel Foil (Light Tight) is used across aerospace, photonics, and advanced electronics sectors where light exclusion is critical alongside meaningful mechanical load-bearing:
- ✦ Optically Sealed Housings
- Used in optically sealed housings where the pinhole-free structure ensures total blockage of external light and improved cold-worked strength compared with AISI 304 provides structural integrity for the housing.
- ✦ Radiation-Shielding Laminates
- Formed into radiation-shielding laminates, where excellent corrosion resistance across a wide temperature range supports reliable performance in demanding aerospace and electronics environments.
- ✦ Photochemical Reaction Enclosures
- Used in photochemical reaction enclosures, where complete light exclusion prevents unwanted photochemical activity and retained ductility supports the formed geometries required for enclosure fabrication.
- ✦ Hermetic Optical Sensor Enclosures
- Applied in hermetic optical sensor enclosures and precision diaphragms in spectroscopic instruments, where optical isolation and structural integrity must coexist in a single thin-section foil component.
Material 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 ) | 510-1100 |
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 70-72 |
| Element | Value |
|---|---|
| Melting point( C ) | 1400-1420 |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 16.3@23°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 15-18@20-100°C |
| Element | Value |
|---|---|
| Density( gcm⁻³ ) | 7.92 |
Tolerances
| Thickness | <0.01mm | ±25% |
|---|---|---|
| Thickness | 0.01mm - 0.05mm | ±15% |
| Thickness | >0.05mm | ±10% |
| Linear dimension | <100mm | ±1mm |
| Linear dimension | >=100mm | +2 / -1% |