2005 - Volume #29, Issue #2, Page #36
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New Technique For Welding Cast Iron

Eugene Keener, Smithville, Ohio: "Welding cast iron is much easier than people think. Instead of using a ni-rod, I use a no. 7018 in a DC reverse polarity mode. I treat the cast iron the same as if I were using ni-rod. However, the 7018 rod is much cheaper and holds better. Of course, if it's a small cast item, it's best to heat the whole item to 400? or so and it'll weld much better. If the casting is too big to do that, I just weld a little at a time an inch or so in length then take a ballpeen hammer or a pointed chipping hammer - and mark it so it stretches out and doesn't pull loose from the rigid cast. I don't start welding another section until I can put my bare hand on the last one. This prevents the piece from getting too hot."

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2005 - Volume #29, Issue #2