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 - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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