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Originally Posted by jr429
Perhaps we should get back to how magnetism is actually detected?
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By all means explain away, but no one is checking for magnetism here, we were looking to see if it was attracted to a magnet, maybe not a big difference to some, but a critical difference still.
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I am NOT a metallurgist but I have paid good money to a lot of metallurgists and material failure scientists for everything from camshafts, valve caps, to seamless extruded piping used to mfg both titanium and SS exhaust systems. As I understand high impurity levels as well as the desire to "half ass" production from the foundry (and yes I have toured seamless tube foundries) can cause this type of rust situation.
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then you agree in the analysis that there is surface contamination...whether here or there or caused by this or that...all of which has been covered and listed and explained as a potential.
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I have seen this problem myself and shipped entire containers back because of it. On the flip side I have had exhaust systems come back due to defects, etc. from all over the world, some places clearly winter conditions with a lot of salt, and all of the product we produced never exhibited that kind of coating. So as a betting man I would say source material is impure or not truly 304. Maybe I"m wrong, but I've built and sold a lot of exhaust related components...
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Maybe it's time you support your local economy instead of buying the cheapest parts you can from china?
I honestly have no experience with bad material quality, my industry doesn't allow for the purchase of bottom barrel non traceable junk metals...want 304? buy 304...
want quality???...buy american