PLANSEE produces pure tantalum as an unalloyed metal with a guaranteed purity of 99.8 %. It has a melting point of 2996 °C and is ductile up to approx. -200 °C despite of its cubic body-centred cubic lattice.
Tantalum can be machined easily for a cubic body-centred metal and shows already at room temperatures elongation > 20 % at tensile strength > 200 N/mm2 in recrystallized condition. For applications at temperatures above 300 °C it has to be noticed that tantalum becomes brittle in contact with oxygen or hydrogen. For nitrogen and hydrocarbons the maximum application temperature is 700 °C.
Advantages of pure tantalum
- excellent corrosion resistance
- high temperature strength
- easy to machine
- good biocompatibility
The use of tantalum
- heat exchangers for the chemical apparatus engineering
- components for the high temperature furnace construction
- manufacture of capacitors in the electronics industry
- boats and coils for resistive evaporation
- string coverings of musical instruments
- medical technology
Tantalum is used in the form of crucibles (drawing dies). Available products include sheet, rod, tube and wire as well as machined and chipless-formed parts according to customer drawings.
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Tantalum was discovered in the year 1802 by the Swedish chemist A.K. Ekeberg. He called the newly found material tantalum, because the behavior of its oxide, which is not easily dissoluble in acid, reminded him of the Pillars of Tantalus. In nature tantalum is always found together with niobium, a material with very similar characteristics.Semifinished products made of tantalum and tantalum alloys (e.g. Ta2.5W) are manufactured by means of sintering as well as melting.
PLANSEE has a long-standing experience in the production of semifinished products as well as readymade components made of tantalum.
 More information on tantalum
Safety data sheet tantalum
Certificate Bureau Veritas
 Corrosion resistance of various metals and alloys
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