Materials > Titanium & Refractory Metals > Tantalum and Ta-Alloys

Tantalum and Ta-Alloys


Atomic Symbol:  Ta

Atomic Number:  73

Melting Point:  5424.8°F/2996.0 °C

Density:  16.65g/cm3


Marketech International, Inc. is a premium supplier of tantalum and Ta-alloys.  We supply only the highest quality tantalum and Ta-alloys at competitive pricing.  All material sold is certifiable and supplied to customer specifications.  Our materials are used across the globe for aerospace, defense, medical, energy,  electronic, industrial and commercial applications.Partnering with our extensive network of global suppliers, we sell all forms of tantalum and ta-alloys in a wide range of compositions.

Marketech also specializes in the machining of tantalum and other refractory metals.  Please visit the machining section of our website to learn about our capabilities and services offered.

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Our sales staff offers superior customer service and technical expertise, offering hard-to-find materials at competitive pricing.  

 Tantalum Tubes Tantalum Sheets, Plates, Rods, Bars, Foil


About Tantalum

Tantalum is classified as a refractory metal due to its high melting point.  It possesses a low vapor pressure and good electrical and thermal conductivity up to very high temperatures.  The advantages of tantalum are excellent corrosion resistance, high temperature strength, good machinability and good biocompatibility.

Tantalum is a strong, ductile metal that is nearly immune to chemical attack at room temperatures. It can be drawn into a fine wire that is used to evaporate metals, such as aluminum. Because of its high melting point it is frequently used as a substitute for platinum, which is more expensive. Tantalum can be alloyed with steel to increase steel's ductility, strength and melting point.

Applications for Tantalum

Tantalum is an element found in many ways in our everyday lives, improving technology and material performance. Its many applications include uses in electronics, medicine, engineering and energy generation.

About half of the tantalum consumed each year is used in the electronics industry, mainly as powder and wire for capacitors, owing to tantalum's particular ability to store and release electrical energy. This allows components to be exceptionally small and they are therefore favored in space-sensitive high-end applications in telecommunications, data storage and implantable medical devices. Tantalum is also used for electronic sound filters and as a barrier against copper diffusion in semi-conductors. Tantalum carbide's hardness makes it ideal for cutting tools.

Tantalum is used to make components for chemical plants, nuclear power plants, airplanes and missiles.  Since it does not react with body fluids it is used to make surgical equipment.  Tantalum also does not irritate the body and thererfore is used to make surgical sutures as well as implants such as artificial joints and cranial plates. 

Tables and Properties

High Quality Tantalum Metal (wt%)

Impurities (max.)
Type Nb C O N Fe Ni W Mo Si Ti
Ta-1 0.01 0.02 0.20 0.01 0.01 0.005 0.003 0.003 0.02 0.003
Ta-2 0.02 0.04 0.30 0.02 0.02 0.01 0.005 0.003 0.02 0.003
FTa-1 0.05 0.03 0.03 0.02 0.01 0.005 0.02 0.02 0.02 0.005
FTa-2 0.10 0.05 0.035 0.03 0.03 0.01 0.03 0.03 0.03 0.01

Typical Composition of Ta-Alloys (wt %)

Type Ta W Nb
R05252 97.5 2.5 -
R05255 90 10 -
R05240 60 - 40

Typical Specification

Type Dimension (mm) Perform Standard
Ta1, Ta2, FTa-1, FTa-2, R05255 R05252 R05240 Sheet, Plate Thickness: 0.01-10 Width max: 1000 Length on required ASTM B 708-98
Rod, Bar Diameter: Φ3.0-Φ110 Length on required ASTM B 365-98
Tube Outside Diameter: Φ0.5-Φ30 Wall Thickness: 0.20-5.00 Length on required ASTM B 52

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