Porosity in steel root pass on pipe

by John Heindel
(Apache Junction Arizona USA)

Why am I getting porosity when making a root pass? I have a Lincoln 175 TIG machine argon cooled. I'm in Arizona and it is hot! I'm using RG45 steel rod and 2%thorated tungsten

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Ditch the rg45 wire ...its strictly for gas welding and does not have the deoxidizers needed .

get some er70s2 or 3 and your porosity should go away.

good luck,

jody

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