I am having an issue that is beyond my limited knowledge of metallurgy. My company makes extruded fin tubing for use in heat exchangers. I was given a sample of a raw copper tube that was too soft for our operators to run it. It was being crushed as it passed through the machine. My boss wanted me to verify that the material was nonconforming and there for rejectable. When I analyzed the sample I expected to see grains that were larger than what was specified in the purchase order. What I found however were clusters of small and medium sized grains surrounding larger ones. I was wondering if anyone might know what would cause this. I have never had this issue before and I'm stumped.
Red Flag Submitted
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action.
Reply To This Thread
Posting in the Eng-Tips forums is a member-only feature.