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Iron Foil (Light Tight)
Available Configurations
Properties common to all products in this list
| Purity | Thickness | Sides | Temper ⓘ | Surface Finish | Other Variant |
|---|---|---|---|---|---|
| 99.5% (2N5) to 99.99% (4N) | 0.004 mm (foil) to 5 mm (sheet) | 5 mm to 1000 mm | As rolled Hard |
Mirror polished on both sides Polished on both sides Unpolished |
Non Light Tested; Pinhole-Free ARMCO® |
Need custom configurations? Please contact us.
Key Features
Iron Foil (Light Tight) is a pinhole-free iron foil that blocks all transmission of visible and near-visible light while retaining the well-characterized mechanical and magnetic baseline properties of elemental iron, including its body-centered cubic structure and tensile strength of 180–210 MPa:
Pinhole-Free Light Barrier Retaining Iron's Well-Characterized Magnetic Baseline
Iron Foil (Light Tight) retains elemental iron's well-characterized mechanical and magnetic baseline properties in a pinhole-free, completely light-excluding format — providing a reference ferromagnetic material wherever a light-tight barrier must also exhibit predictable, well-documented magnetic behavior.
High Melting Point (1535 °C) & Thermal Conductivity (80.4 W/m·K) for Demanding Processing Conditions
With a melting point of 1535 °C and thermal conductivity of 80.4 W/m·K, Iron Foil (Light Tight) withstands more demanding processing conditions than many light-tight foil alternatives — maintaining its pinhole-free optical barrier function in applications requiring elevated-temperature compatibility beyond softer light-tight foils.
Ferromagnetic Behavior Combined with Optical Isolation
Iron's ferromagnetic behavior supports applications where magnetic shielding and optical isolation must be combined — distinguishing Iron Foil (Light Tight) from non-magnetic light-tight alternatives in magnetic sensor calibration and ferromagnetic testing environments where both functions are simultaneous requirements.
Well-Characterized Mechanical Baseline (Tensile Strength 180–210 MPa) in a Light-Tight Format
The well-characterized tensile strength of 180–210 MPa and body-centered cubic structure that make iron the reference engineering metal are retained in this light-tight format, providing predictable mechanical behavior in light-tight shielding components and protective barriers subject to mechanical stress during installation or service.
Reference Ferromagnetic Material for Magnetic Property Research Requiring Optical Isolation
In research, Iron Foil (Light Tight) is used wherever a light-tight metallic barrier must also serve as a reference ferromagnetic material or participate in magnetic property investigations — combining iron's well-documented magnetic baseline behavior with the optical isolation required for photosensitive magnetic measurement apparatus.
Industrial Applications
Iron Foil (Light Tight) is used in magnetic sensor calibration, ferromagnetic testing, and corrosion research wherever a light-tight barrier must also serve as a well-characterized reference ferromagnetic material:
- ✦ Light-Tight Enclosures for Magnetic Sensor Calibration
- Used as light-tight enclosures for magnetic sensor calibration, where Iron Foil (Light Tight)'s well-documented ferromagnetic baseline behavior provides a reliable reference material for calibrating magnetic sensors within an optically isolated enclosure that excludes light interference from the calibration measurement.
- ✦ Shielding Components in Photosensitive Ferromagnetic Testing Setups
- Applied as shielding components in photosensitive ferromagnetic testing setups, where the combination of complete light exclusion and iron's predictable ferromagnetic behavior allows magnetic property measurements to be conducted without interference from either ambient light or unpredictable magnetic shielding material behavior.
- ✦ Protective Barriers in Corrosion Studies Requiring Optical Isolation
- Used as protective barriers in corrosion studies requiring optical isolation, where Iron Foil (Light Tight)'s well-characterized baseline corrosion behavior provides a reference material for comparative corrosion studies conducted within light-excluding test apparatus.
- ✦ Higher-Temperature-Tolerant Light-Tight Barriers
- Used wherever a light-tight barrier must withstand more demanding processing or service conditions than many light-tight foil alternatives can tolerate, with a melting point of 1535 °C and thermal conductivity of 80.4 W/m·K providing the thermal robustness required in elevated-temperature optical isolation applications.
- ✦ Research: Reference Ferromagnetic Material in Magnetic Property Investigations
- Used in research wherever a light-tight metallic barrier must also serve as a reference ferromagnetic material or participate in magnetic property investigations — providing a well-documented magnetic baseline within an optically isolated, pinhole-free foil component for systematic and comparable experimental programs.
Material Properties
| Element | Value |
|---|---|
| Atomic number | 26 |
| Crystal structure | Body centred cubic |
| Electronic structure | Ar 3d⁶ 4s² |
| Valences shown | 2, 3, 4, 6 |
| Atomic weight( amu ) | 55.847 |
| Thermal neutron absorption cross-section( Barns ) | 2.56 |
| Photo-electric work function( eV ) | 4.4 |
| Natural isotope distribution( Mass No./% ) | 58/ 0.3 |
| Natural isotope distribution( Mass No./% ) | 57/ 2.1 |
| Natural isotope distribution( Mass No./% ) | 56/ 91.8 |
| Natural isotope distribution( Mass No./% ) | 54/ 5.8 |
| Atomic radius - Goldschmidt( nm ) | 0.128 |
| Ionisation potential( No./eV ) | 2/ 16.18 |
| Ionisation potential( No./eV ) | 5/ 75.0 |
| Ionisation potential( No./eV ) | 4/ 54.8 |
| Ionisation potential( No./eV ) | 3/ 30.65 |
| Ionisation potential( No./eV ) | 1/ 7.87 |
| Ionisation potential( No./eV ) | Jun-99 |
| Element | Value |
|---|---|
| Hardness - Mohs | 04-5 |
| Material condition | Polycrystalline |
| Poisson's ratio | 0.293 |
| Bulk modulus( GPa ) | 169.8 |
| Tensile modulus( GPa ) | 211.4 |
| Izod toughness( J m⁻¹ ) | 8-16 |
| Tensile strength( MPa ) | 180-210 |
| Yield strength( MPa ) | 120-150 |
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 10.1@20°C |
| Temperature coefficient( K⁻¹ ) | 0.0065@0-100°C |
| Thermal emf against Pt (cold 0C - hot 100C)( mV ) | 1.98 |
| Element | Value |
|---|---|
| Boiling point( C ) | 2750 |
| Density( gcm⁻³ ) | 7.87@20°C |
| Element | Value |
|---|---|
| Melting point( C ) | 1535 |
| Latent heat of evaporation( J g⁻¹ ) | 6095 |
| Latent heat of fusion( J g⁻¹ ) | 272 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 444@25°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 80.4@0-100°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 12.1@0-100°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% |