Pure Tantalum (Ta)



Tantalum is a sensible choice whenever high corrosion resistance is required. Even though tantalum is not one of the noble metals, it is comparable to them in terms of chemical resistance. In addition, tantalum is very easy to work at well below room temperature despite its body-centered cubic crystal structure.



Sound speed, longitudinal clong

4100 m/s at 20 °C

Sound speed, transversal ctrans

2900 m/s at 20 °C


Electrical conductivity σel

8.00E+6 S/m at 20 °C

Electrical resistivity ρel

1.3E-7 Ω·m at 20 °C

Electron work function We

4.3 eV at 20 °C

Superconductive transition temperature Tsuper

-268.65 °C


Density ρ

16.6 g/cm³ at 20 °C

Molar mass M

180.95 g/mol

Neutron capture cross-section σN

0 m² at 20 °C


Elastic modulus E

186 GPa at 20 °C

Hardness, Vickers, 10 HV 10

80 - 125 [-] at 20 °C


Poisson's ratio ν

0.35 [-] at 20 °C


Boiling point Tb

5458 °C

Coefficient of thermal expansion α

6.4E-6 1/K at 20 °C

Crystallization temperature Tx

900 - 1450 °C

Melting point Tm

2996 °C

Specific heat capacity cp

140 J/(kg·K) at 20 °C

Thermal conductivity λ

57.5 W/(m·K) at 20 °C

Technological properties

Application areas

Tantalum's corrosion resistance makes it a valuable material in a large number of chemical applications. This material is used, for example, to produce heat exchangers for the equipment construction sector, charge carriers for furnace construction, implants for medical technology and capacitor components for the electronics industry.

This material data has been provided by Plansee.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.