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 - Harvestin Corn in Southern Wisconsin: The Early Years - by Pat Browning. In this area of Wisconsin, most crops are raised to support livestock production or dairy herds in various forms. Corn products were harvested for grain, and for ensilage (we always just called it 'silage'). Silo Filling Time On dairy farms back in the 30's and into the first half of the 40's, making of corn silage was done with horses pulling a corn binder producing tied bundles of fresh, sweet-smelling corn plants, nice green leaves with ear; the
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