Hafnium Foil

Formula: Hf

Form: Foil/Film/Sheet

Material: Hafnium

CAS Number: 7440-58-6

Commodity: Metals

Purity: 97%

Hafnium Foil is a metallic foil available as part of our extensive range of specialty metals and alloys. With 74 variations to choose from, this foil comes in multiple thicknesses and dimensions to suit a variety of applications. Known for its high melting point, excellent corrosion resistance and thermal neutron absorption cross section, Hafnium Foil is commonly used in aerospace components, plasma cutting electrodes and control rods in nuclear reactors. The availability of this versatile material in foil form expands its potential in high-temperature furnace linings, radiation shielding and microelectronics.

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Technical Data Sheet Safety Data Sheet Tolerance Properties

each

Tolerances

Foil/Film/Sheet

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

Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	72
Crystal structure	Hexagonal close packed
Electronic structure	Xe 4f¹⁴ 5d² 6s²
Valences shown	4
Atomic weight( amu )	178.49
Thermal neutron absorption cross-section( Barns )	103
Photo-electric work function( eV )	3.9
Natural isotope distribution( Mass No./% )	179/ 13.8
Natural isotope distribution( Mass No./% )	176/ 5.2
Natural isotope distribution( Mass No./% )	180/ 35.2
Natural isotope distribution( Mass No./% )	174/ 0.2
Natural isotope distribution( Mass No./% )	177/ 18.5
Natural isotope distribution( Mass No./% )	178/ 27.1
Atomic radius - Goldschmidt( nm )	0.159
Ionisation potential( No./eV )	3/ 23.3
Ionisation potential( No./eV )	1/ 7.0
Ionisation potential( No./eV )	2/ 14.9
Ionisation potential( No./eV )	4/ 33.3

Mechanical Properties

Element	Value
Material condition	Hard
Material condition	Soft
Poisson's ratio	0.26
Poisson's ratio	0.26
Bulk modulus( GPa )	109
Bulk modulus( GPa )	109
Tensile modulus( GPa )	141
Tensile modulus( GPa )	141
Hardness - Vickers( kgf mm⁻² )	150-180
Tensile strength( MPa )	445
Tensile strength( MPa )	745
Yield strength( MPa )	365
Yield strength( MPa )	240

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	32.2@20@20°C
Superconductivity critical temperature( K )	0.128
Temperature coefficient( K⁻¹ )	0.0044@0-100°C

Physical Properties

Element	Value
Boiling point( C )	4602
Density( gcm⁻³ )	13.1@20°C

Thermal Properties

Element	Value
Melting point( C )	2227
Latent heat of evaporation( J g⁻¹ )	3700
Latent heat of fusion( J g⁻¹ )	122
Specific heat( J K⁻¹ kg⁻¹ )	146@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	23@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	6@0-100°C

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Hafnium Foil

Tolerances

Material Properties for Metals