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ER70S-2 or ER70S-6? for TIG welding Carbon Steel
What is the best filler rod for TIG welding carbon steel? Is it good old ER70s-2? or ER70s-6 with higher silicon content? The differences between ER70S-2 and ER70S-6 are pretty subtle for fillet welds on clean metal. And even on light mill...