Porosity issues with 6061-T6 aluminum

[GDKelley]

I'm starting to suspect they are pulling their welding rod out of the gas coverage, could that be the problem?...

[GDKelley]

I'll get all the settings from the welders that are having problems Monday. Myself along with 99% of our welders are D17.1 certified on 5 alloys. It's looking like it's probably equipment or technique as two other welders just passed x-ray on their .040 aluminum today first attempt. The two guys having...

[GDKelley]

We're having a problem with porosity in our 4027 aluminum 3G coupons. We test on .040 and .063 3G, pre weld cleaning is acetone wipe, ss wire brush with new brush and acetone wipe after, rubber gloves to handle coupons. We clean both coupons and welding wire and use pure argon. Would adding some helium...