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Formula: Hf
Form: Wire
Material: Hafnium
CAS Number: 7440-58-6
Commodity: Metals
Temper: As Drawn
Hafnium Spooled Wire is a ductile, high-purity metallic wire form of hafnium, wound onto spools for ease of handling in research, fabrication, and industrial processes. It retains hafnium’s hallmark properties of high melting point, corrosion resistance, and excellent compatibility with extreme environments, while the wire geometry makes it especially suited for welding, plasma applications, and thin-film deposition. Aerospace, energy, and electronics industries rely on hafnium wire for critical applications where precision and durability are required. Specific technologies benefiting from hafnium spooled wire include wire drawing processes that produce smooth, high-strength wires conforming to ASTM B737 standards for hot-rolled and cold-drawn hafnium products; advanced plasma-cutting and welding devices where hafnium wire serves as a reliable electrode material; and semiconductor processing where fine wires act as sources for thin-film coatings. In research, hafnium spooled wire enables controlled studies of mechanical properties, surface structure, and high-temperature performance, advancing knowledge of refractory metals. By combining purity, formability, and resilience, Hafnium Spooled Wire remains indispensable in both scientific exploration and industrial manufacturing.
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Tolerances

Wire
Diameter ±10%
Length +5% / -1%

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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