I've welded several diiferent things made of cast iron. Intake and exhaust manifolds, antique chairs, generator brackets, manifolds on Detroit V8s,etc. using 7018 Low Hydrogen rod DC+ polarity and a hot enough to get a good weld. Most cases on the smaller items I warm them a bit first then weld and peen it several times right when I am done welding. On the longer welds or multi welds such as a manifold in several pieces, I tack it together and peen after each tack, then I really don't worry about preheating the large items that much. I just weld an inch or two at each spot then move around the part welding and peening until it is completely welded. By then the part is pretty much the same temp all over and I peen it a few more times around the part for the first 5 minutes after welding. Then either let it cool down by itself or in the case of the larger parts place it in sand until it cools. Usually have really good success with this method. Good Luck Dan
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Today's Featured Article - Women and Tractors - Tractor Engine Repair - by Teri Burkholder. One of the great things about working on a tractor engine with your other half is that you know what he is thinking of at all times and can anticipate his every move and his next thought of what he will do. With Ben, anyway, I can tell! He'll be busy working and I’m handing him tools and he says, "give me that..." and I’ve already got it in his hand or "hand me that....."and I’ve got the portable light right where he needed it placed to see. "Run in the house and get me a...."as I open th
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