Tantalum is a rare, hard, blue-grey, dense, lustrous metal that is renowned for its high corrosion resistance. It is a very hard, malleable, ductile, easily fabricated and highly conductive of heat and electricity. Tantalum is one of the most inert, unreactive metals known.

Tantalum product uses

Tantalum’s primary use is in high power electronic capacitors and resistors. Tantalum is one of the best metals for this purpose as it confers a high capacitance in a small volume, offering size and weight advantages in sophisticated hand-held electronic devices such as mobile phones and portable computers.

The chemical inertness of tantalum allows its use to medical and dental applications, since the metal does not interact with body tissues. It is used in artificial hip and knee joints, as well as pins, screws, staples, and other devices used to hold bones together.

Tantalum is also used to produce superalloys that have high melting points, excellent strength and  good ductility. Tantalum alloys are used in laboratory equipment, writing pen tips, and tools that operate at high speeds and temperatures.

Tantalum properties

Density 16.65 g/cm3 (at 20°C)
Mohs' hardness 6.5
Melting point 3017°C
Thermal capacity 140 J/(kg . K)
Thermal conductivity 57 W/(m . K)
Electrical conductivity 7.61 . 106 A/(V . m)

Tantalum is sold as

  • Bars
  • Rods

LKAB Minerals' Tantalum originates from reliable sources in the U.S. and China.

Tantalum toxicology


Product expert

Leon Hendriks
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