I've welded both cast steel and cast iron without any problems. The cast steel was on the bucket pivot on our loader. I ground it out and first laid down some 6011 in the bottom, then 7014 or 7018 on top. Been about a year now and the arm is still holding up, even after a winter of frozen manure piles, moving large chunks of concrete, rocks, and anything else the typical loader tractor gets abused for.
I've welded several cast iron things, one was the hitch clevis on our disc. Still holding solid. I veed it out all the way through, and laid multiple passes of Ni rod, chipping and peening it after every pass. I didn't have any sand or anything to stick it in to cool it as slow a it should be, but it's held very solid for 10 years now. (I was a freshman in High School welding class when I did it)
If you grind it out and chip the slag after every pass and take your time, I wouldn't be afraid of welding it at all. I've welded several other peices of cast so far, and so far they've all held up.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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