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Formula: Fe
Form: Foil (Light Tight)
Material: Iron
CAS Number: 7439-89-6
Commodity: Metals
Light Tight: Light Tight
We offer an extensive range of Iron Foil (Light Tight) products. With 139 variations available, this foil provides opacity and can block light for applications requiring light shielding. This makes it useful for shielding photosensitive materials or devices where exposure to light must be prevented. Applications include shielding components in optical instruments or protecting light-sensitive chemicals during transport and storage. The wide choice of Iron Foil (Light Tight) we stock allows flexibility in selecting the right thickness, size and properties for your specific light blocking requirements.
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Material Properties for Metals

Atomic 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
Mechanical Properties
Element Value
Hardness - Mohs 04-May
Material condition Polycrystalline
Poisson's ratio 0.293
Bulk modulus( GPa ) 169.8
Tensile modulus( GPa ) 211.4
Izod toughness( J m⁻¹ ) Aug-16
Tensile strength( MPa ) 180-210
Yield strength( MPa ) 120-150
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 10.1@20@20°C
Temperature coefficient( K⁻¹ ) 0.0065@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV ) 1.98
Physical Properties
Element Value
Boiling point( C ) 2750
Density( gcm⁻³ ) 7.87@20°C
Thermal Properties
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

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