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Formula: W
Form: Disk
Material: Tungsten
CAS Number: 7440-33-7
Commodity: Metals
Purity: 99.95%
Temper: As Rolled
Tungsten disks are part of our extensive range of disks and targets. With 44 variations available, they provide properties like high density, strength and hardness, while remaining somewhat brittle. Example applications of these disks include being used as high-speed rotating balance weights, kinetic energy penetrators, and X-ray shielding in medical and industrial settings. The range of sizes and thicknesses offered makes Tungsten disks suitable for prototyping, research and small-scale production.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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Tolerances

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

Material Properties for Metals

Atomic Properties
Element Value
Atomic number 74
Crystal structure Body centred cubic
Electronic structure Xe 4f¹⁴ 5d⁴ 6s²
Valences shown 2,3,4,5,6
Atomic weight( amu ) 183.85
Thermal neutron absorption cross-section( Barns ) 18.5
Photo-electric work function( eV ) 4.55
Natural isotope distribution( Mass No./% ) 183/ 14.3
Natural isotope distribution( Mass No./% ) 182/ 26.3
Natural isotope distribution( Mass No./% ) 186/ 28.6
Natural isotope distribution( Mass No./% ) 180/ 0.1
Natural isotope distribution( Mass No./% ) 184/ 30.7
Atomic radius - Goldschmidt( nm ) 0.141
Ionisation potential( No./eV ) 1/ 7.98
Ionisation potential( No./eV ) 2/ 17.7
Mechanical Properties
Element Value
Material condition Soft
Material condition Hard
Poisson's ratio 0.28
Poisson's ratio 0.28
Bulk modulus( GPa ) 311
Bulk modulus( GPa ) 311
Tensile modulus( GPa ) 411
Tensile modulus( GPa ) 411
Hardness - Vickers( kgf mm⁻² ) 360
Hardness - Vickers( kgf mm⁻² ) 500
Tensile strength( MPa ) 550-620
Tensile strength( MPa ) 1920
Yield strength( MPa ) 550
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 5.4@20@20°C
Superconductivity critical temperature( K ) 0.0154
Temperature coefficient( K⁻¹ ) 0.0048@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV ) 1.12
Physical Properties
Element Value
Boiling point( C ) 5660
Density( gcm⁻³ ) 19.3@20°C
Thermal Properties
Element Value
Melting point( C ) 3410
Latent heat of evaporation( J g⁻¹ ) 4009
Latent heat of fusion( J g⁻¹ ) 192
Specific heat( J K⁻¹ kg⁻¹ ) 133@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 173@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 4.5@0-100°C

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