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15-7PH Stainless Steel Foil (Light Tight)
Available Configurations
Properties common to all products in this list
Key Features
15-7PH Stainless Steel Foil (Light Tight) (UNS S15700) is a pinhole-free semi-austenitic precipitation-hardening stainless steel foil engineered to provide a light-impermeable barrier while delivering high tensile strength, good corrosion resistance, and thermal stability:
Pinhole-Free Light-Impermeable Barrier
Manufactured to a pinhole-free structure, this foil provides a complete light-impermeable barrier suited to optical isolation applications where any light leakage would compromise system performance.
High Structural Rigidity from Precipitation Hardening
The precipitation-hardening capability allows tensile strength to be raised through controlled heat treatment, providing structural rigidity in the light-tight barrier beyond that achievable with softer foil alternatives used for optical isolation.
Resistance to Oxidation & Thermal Cycling
Resistance to oxidation and mechanical degradation under thermal cycling makes this foil suitable for aerospace, precision electronics, and optical instrumentation applications where the light-tight barrier must withstand repeated thermal exposure without losing integrity.
Good Corrosion Resistance
Good corrosion resistance supports reliable service life in protective enclosures for photosensitive sensors deployed in corrosive operating environments.
Combined Optical & Structural Load-Bearing Performance
This foil is engineered to simultaneously maintain optical isolation and mechanical load-bearing capability, a combination required in thermal shielding assemblies and aerospace applications where the barrier material performs dual structural and optical functions.
Industrial Applications
15-7PH Stainless Steel Foil (Light Tight) is used across aerospace, precision electronics, and optical instrumentation sectors wherever optical isolation must be maintained alongside mechanical load-bearing performance:
- ✦ Light-Blocking Aperture Components
- Used as light-blocking aperture components where the pinhole-free structure ensures complete light exclusion and the precipitation-hardened strength provides structural rigidity beyond that of softer light-tight foil alternatives.
- ✦ Protective Enclosures for Photosensitive Sensors in Corrosive Environments
- Formed into protective enclosures for photosensitive sensors operating in corrosive environments, where good corrosion resistance combined with reliable optical isolation protects sensitive sensor elements from both environmental degradation and stray light.
- ✦ Thermal Shielding Assemblies
- Applied in thermal shielding assemblies where both optical and structural performance are simultaneously required, leveraging the foil's resistance to oxidation and mechanical degradation under thermal cycling.
- ✦ Aerospace & Precision Electronics Optical Isolation
- Used in aerospace and precision electronics applications requiring optical isolation, where the combination of high tensile strength after precipitation hardening and pinhole-free light blocking meets demanding reliability requirements.
- ✦ Sensor Encapsulation & Optoelectronic Isolation Research
- Supports development of advanced sensor encapsulation and optoelectronic isolation barriers where conventional light-tight foils would be inadequate under service conditions requiring combined mechanical and optical performance.
Material Properties
| Element | Value |
|---|---|
| Elongation at break( % ) | <30 |
| Tensile strength( MPa ) | 1020 |
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 80 |
| Element | Value |
|---|---|
| Density( gcm⁻³ ) | 7.81 |
| Element | Value |
|---|---|
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 14.4@20-90°C |
Tolerances
| Thickness | <0.01mm | ±25% |
|---|---|---|
| Thickness | 0.01mm - 0.05mm | ±15% |
| Thickness | >0.05mm | ±10% |
| Linear dimension | <100mm | ±1mm |
| Linear dimension | >=100mm | +2 / -1% |