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Tungsten Rod

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Composition: W Form: Rod Material: Tungsten CAS Number: 7440-33-7 Commodity: Metals Purity: 99.95%
Tungsten Rod offers a high melting point (3422 °C), low vapor pressure, and excellent dimensional stability (CTE: 4.5×10⁻⁶/K), making it suitable for high-temperature furnaces, electron beam instruments, and thermal evaporation systems. Its high density (19.3 g/cm³) provides effective radiation shielding in nuclear research and diagnostic imaging setups. Tungsten rods are used as a base for doped TIG (e.g. thoriated or lanthanated tungsten) electrodes, discharge tubes, and thermionic emission experiments due to their conductivity and durability. Their low thermal expansion and resistance to deformation support precision in load-bearing assemblies. Applications also include thin film deposition substrates and calibration in thermophysical testing across aerospace, metallurgy, and advanced materials research.
Starting at $299.00 each
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Material Properties

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°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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Available Configurations

Properties common to all products in this list

Composition: W Form: Rod Material: Tungsten CAS Number: 7440-33-7 Commodity: Metals Purity: 99.95%

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Tolerances

Rod
Diameter =<10mm ±10%
Diameter >10mm ±5%