Tungsten-Thorium

Aerospace

Semiconductors

Chemical Industry

Catalog

Available shades

Select a grade to view its complete technical data sheet: chemical composition, mechanical properties, and available shapes and dimensions.

WTh

Tungsten-Thorium

ASTM B801

Concept Métal, your supplier of thoriated tungsten

Thoriated tungsten is a tungsten alloy containing a small percentage of thorium oxide (ThO₂). This addition gives it superior electron emission properties compared to pure tungsten and better mechanical strength at high temperatures.

What is thoriated tungsten?

Thoriated tungsten is an alloy in which ThO₂ particles are finely dispersed throughout the tungsten matrix. They facilitate electron emission and stabilize the metal’s structure at high temperatures.

This material has several advantages:

easier arc ignition at low voltage
excellent electric arc stability
enhanced mechanical performance at very high temperatures
improved machinability compared to pure tungsten

Learn more

What are the applications for thoriated tungsten?

Thoriated tungsten is used for:

DC TIG welding electrodes (WT10 / WT20 / WT30 / WT40)
Cathodes for X-ray tubes and medical imaging
filaments and heating elements for vacuum furnaces
high-temperature aerospace components
ion sources and research equipment

Since thorium is only slightly radioactive, thorium-free alternatives are available (WL15, WL20, WC20). Our specialists can advise you on the best choice based on your application and regulatory requirements.

Applications

Available Sizes

Gallery

Is your shade not listed?

Our teams can source specific grades or those that are hard to find on the market. Contact us with your designation or standard.