I have a Lincoln AC225 welder (with add on DC).
I would like to make plug welds in 1/2" bar stock. I experimented recently with welding 1/2" thick plate. I started with a 1/4" hole and moved up to 1/2" holes . 1/2" was almost too small. I am using3/32" 6013 DC+. I would make a mulitple welds (about 3) chip out the slag between the welds and reweld. Without chipping there would be heavy slag in the weld.
Is there any general rules or techniques to follow?
Would 6011 be a better choice?