3/32" 2% lanthanated.  A 1/16" might be a better choice for a butt joint in this thickness but it can be done with either size.

That particular fab shop took great pains to separate carbon from stainless work. Even to the extent they built a wall and color coded all tools. Red for carbon and green for ss.

Always more to learn.

Aluminum seems to want to take more filler rod than steel but I think the technique varies from one situation to another.  there are times when I push quite a bit of filler rod into the puddle.  Other times I use the light tapping action.  It depend a lot on size of filler rod used and joint type.

For example, on a thin butt weld, much less filler is added than for a thicker fillet weld.

hope this helps

worm hole tracks can be tough to diagnose.  Sometimes its moisture in the flux so a slightly longer stickout can help in letting it heat up more before depositing into the puddle.  That also brings up the point that keeping a spool on the machine for a long time be a problem as the flux can absorb moisture.  going up or down a half a bit on voltage seems to work sometimes.  But when you correct the issue, you are never really 100% sure what did the trick.  thats my experience anyway.

Hey Jeff, thanks for the constructive criticism.   We will work to do better.

jody

thats great to hear

I usually go for a bit more cleaning action than normal on a job like this but not all that much...just a percent or 2 .  probably had it set to around 32% cleaning on the ac balance but not enough to round the tungsten much.  And I was using a square wave machine.

glad you enjoyed it.

Kevin Fox Great feedback.  Everyone can stand some self reflection from time to time.