Tantalum-2.5% Tungsten (Ta-2.5W) is used in the aerospace industry for hot-gas valves and in the chemical industry for corrosion resistant heat exchangers, valves and liners.

CHEMICAL COMPOSITION ACCORDING TO ASTM B365 92 R05252 AS FOLLOWS:

 

Tantalum (Ta)

Remainder

Tungsten (W)

2.00-3.50%

Carbon (C)

0.0100%max

Oxygen (O)

0.0150%max

Nitrogen (N)

0.0100%max

Hydrogen (H)

0.0015%max

Niobium (Nb)

0.5000%max

Iron (Fe)

0.0100%max

Titanium (Ti)

0.0100%max