I have been told that copper contamination can be the cause of cracks in welds. Is this true? Is this specific to a type of metal? If it does cause cracks why is copper used so commonly around welded components? I.e., GTAW collets, GMAW contact tips and nozzles, pipeline backup shoes for the root-pass. Is there any type of copper alloy that is better to use than another to stop the cracking?
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