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This is my second butt weld. Two 1/8x1.25" flat pieces were placed next to one another lengthwise. I set amperage to 80 amps, according to Wayne. I used 6013 1/8" electrodes.
To weld them, I first tack welded them in two places, about 1/2" from each end. Then I ran one bead on one side and then, one bead on another. This operation consumed the remaining 2/3 of that electrode (first 1/3 was used for the first weld).
You see the weld with slag removed, from both sides. I then used a chop saw to cut the joined pieces to see what's happening in the weld. To my surprise, the weld looked like it was original metal, no sign of any inclusions, dissimilarity or boundary.
Then I tried to do some destructive testing. I sliced a small slice across the weld, put it in a vise and bent 90 degrees. Then I held it with pliers and banged on it with a hammer, until it bent 180 degrees. It bent and did not break.
