Iron Foil

Designed for demanding environments, Goodfellow's Iron Foil delivers high magnetic performance, mechanical strength, and formability - ideal for electromagnetic devices, structural components, and advanced material research. Produced from 99.5% to 99.99% pure iron with ultra-tight thickness ranges (0.0005 mm to 3.1 mm), it integrates seamlessly into assemblies where magnetic permeability, structural integrity, and dimensional precision are essential. We offer in lengths and widths up to 1000 mm, with optional mirror polishing on both sides for enhanced surface quality and uniformity. Iron’s strong ferromagnetic properties and high permeability make it a core material for transformers, inductors, and magnetic shielding, while its ductility supports ultra-thin fabrication for sputtering targets and micro-scale components. Its conductivity and compatibility with CVD processes enable use in sensor housings, heating elements, and graphene growth substrates. These properties make our iron foil the preferred choice for magnetic shielding, structural reinforcements, scientific instrumentation, and energy system components.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Foil

Thickness	<0.01mm	±25%
Thickness	0.01mm - 0.05mm	±15%
Thickness	>0.05mm	±10%

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