ran out tonite to pick up some alum filler rod -- all the welding shop had left was 4047.. i've seen it here recommended for castings, so i picked up a few pounds.
i tried it on plate Aluminum. the weld beads looked .. 'funky'.. it *looked* rough but felt smooth to the touch. sort of like big 'grain'
curious: is this a weaker weld? should i use 4047 ONLY for castings, or can i use it on plate AL in a pinch?
(i ordered the regular stuff, but am anxious to keep the practice up)
thanks,
-tony