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Maybe one of the pro-welders out there can answer this: I always thought the reason that chrome moly could not be migged because mig uses a 'mild steel' rod and/or w/copper coating and that the mixing/welding together of mild steel or other metals not similar to chrome moly causes weld embrittlement. So why not MIG with chrome moly wire instead?



Their main concern is that you can over heat the
tubing with a mig, the tig concentrates the heat more