Re: Block welding
The only real success we had with large cast iron parts was to preheat the whole thing with a couple rosebuds, arc weld with high-nickel rods, then pack and bury the part in lime and let it cool naturally (it would take a day or two).
I'm not a welder. I was a pre-heater and a lime-packing helper at the time. I can't give any detail on rod number, current or voltage. We were repairing slide valves approximately the same size as an engine block.
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