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Tantalum Wire

Tantalum Wire

Tantalum wire is a ductile and corrosion-resistant metal wire made from tantalum, a rare and hard transition metal. Tantalum wire is used in a wide range of applications, including in the electronics industry, where it is used for wiring in capacitors, in the medical industry for implants and surgical tools, and in the aerospace industry for high-temperature applications. Tantalum wire is also used in the chemical industry for its resistance to corrosion and high melting point. Tantalum wire can be produced in different diameters and can be further processed into various shapes and forms, including coils and filaments.

Tantalum Wire Properties (Theoretical)

Molecular Weight 180.94
Appearance Silvery-gray solid
Melting Point 3017 °C
Boiling Point 5458 °C
Density 16.69 g/cm3 (20 °C)
Solubility in H2O N/A
Crystal Phase / Structure α: body-centered cubic (bcc) / β: tetragonal
Electrical Resistivity 131 nΩ·m (20 °C)
Electronegativity 1.5 Paulings
Heat of Fusion 36.57 kJ/mol
Heat of Vaporization 753 kJ/mol
Poisson's Ratio 0.34
Specific Heat 140 J/kg·K
Thermal Conductivity 57.5 W/m·K
Thermal Expansion 6.3 µm/m·K
Vickers Hardness 870–1200 MPa
Young's Modulus 186 GPa


Diameter 0.004" - 0.125"
Purity 99.5% - 99.99%
Condition Annealed, Unannealed

Tantalum and tatanlum alloy Wire Specifications

  • Materials: R05200, R05400, R05252 (Ta2.5W), R05255 (Ta10W), R05240 (Ta40Nb)
  • Standard: ASTM B365, ASTM F560 (Medical Grade)
  • Size: 0.004" - 0.125" diameter x L
  • Purity: 99% - 99.999%

Tantalum Wire Mechanical Properties

Product condition Tensile strength (MPa) Elongation, %
Annealed 300~600 10~30
Half annealed >600~1000 <5
Unannealed >1000 <5

Tantalum Wire Applications

  • Anode Leads for Tantalum Electrolytic Capacitors
  • Made of tantalum yarn or tantalum mesh
  • Making Tantalum Capacitors
  • Medical tantalum wire can be used to suture nerves and tendons.


We handle our products with care to ensure they remain in their original condition during storage and transportation and to preserve their quality.

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