I'm about to make my annual pigrimage to the welding supply store. Very soon I'm going to be doing a lot of critical TIG welds (fillets) in 3/16" A36 or A500 steel.
I've read that the 2% thoria is added to enhance then current carrying capacity of the electrode, but the radioactivity scares me even if it's pretty low level. Would I be sacrificing anything if I switched to the lanthanum types? Should I get the yellow or the black?
--zeb