Title: The base metal needs to throughly mix with the weld filler metal. On top of that you do not want to burn up the base metal with to much heat. On the other side of the coin you do not want to produce to cold of a joint.
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The base metal needs to throughly mix with the weld filler metal. On top of that you do not want to burn up the base metal with to much heat. On the other side of the coin you do not want to produce to cold of a joint.