[ RadSafe ] Which welding rods are hot?

Thompson, Dewey L DThompson3 at ameren.com
Mon Nov 5 14:18:05 CST 2012

Regular welding rods used for stick arc are not radioactive.  Tungsten Inert Gas  (TIG, sometimes called Gas Tungsten Arc Welding GTAW) electrodes generally are, they have Thorium in them.  I use one routinely in a Cloud Chamber as the alpha source.  There is research in the literature on the Th-232 exposure (main source is from grinding the electrode points need to be refreshed routinely).

A Link:



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From: radsafe-bounces at health.phys.iit.edu [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Ted de Castro
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Subject: [ RadSafe ] Which welding rods are hot?

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I know I've encountered some considerably hot welding rods - but didn't notice the type designation.

I just checked my own supply - so 60's, 70's and 78's - I was SURE at least my 6010 would be hot --- but NO - they none were.

So - asked of anyone who has some hot ones --- what type?

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