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Formula: W
Form: Wire
Material: Tungsten
CAS Number: 7440-33-7
Commodity: Metals
Purity: 99.95%
Diameter: 0.03mm
Coating: Platinum Plated

Platinum Plated Tungsten Spooled Wire

Platinum Plated Tungsten Spooled Wire is used in specialized thermocouples, mass spectrometers, and high-temperature vacuum systems for its stable electrical conductivity, oxidation resistance, and thermal durability. The tungsten core offers mechanical strength and a high melting point, while the platinum coating enhances surface conductivity and chemical inertness. This material pairing is suited to applications in aerospace propulsion testing, semiconductor wafer fabrication, and precision surgical probes. Its performance remains consistent in controlled laboratory environments where reliable signal transmission and corrosion resistance are essential under extreme conditions. It is also employed in electrochemical sensing platforms, where the platinum layer provides a reliable catalytic surface for redox reactions in fuel cells and biosensors for research and industrial applications with extreme thermal and chemical conditions.
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Tolerances

Wire
Diameter ±10%
Length +5% / -1%

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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