If you will,please clarify.Copper filler?Do you mean steel filler that is copper plated to prevent corrosion in storage?Which those tacking of steel tube blotches most likely are.Just questioning.There probably is a copper filler for tig welding copper.We used a Phosphorus/silver filler in the AC industry for brazing copper.A silver filler for copper to steel braze joints. I would like to know more.Perhaps some engineer will enlighten all of us? Harris Spracher,Waynesboro Va.
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