Originally posted by Northern
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also word to the wise, with backer plates / chill rings and such, copper is great as steel wont stick too it but if you get it too hot, (IIRC copper has a melting point of just shy of 2000*) well below that of steel. If your doing anything where copper has gravity pulling it towards the weld puddle be careful to not over heat the copper. Copper and Steel DONT LIKE EACH OTHER AND WILL NOT PLAY NICE. Copper will actively migrate in the weld once cooled looking for a way out, and will while molten migrate into the expanded micro structure of the semi molten steel during the welding process at the limits of weld penetration. ANY COPPER inclusions will cause weld cracking at some point just a question of when, while this is not really a big deal when used as a chill ring/backer plate for auto body repairs and such, its just something to be aware of.
Also on a side note what happened the whole forum seems to be loading much faster and more over the whole experience is just more enjoyable than it has been since the software swap, all of the sudden today!!!!!! I still love this place
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