I have a lot of trouble with imported steel, 'Australian Tube Mills' and other Aussie made steel is far above the standard that's being imported of late, RHS, sheetmetal, pipe, flatbar, shaft and the list goes on, imported crap is cheaper but a much lower quality, even had trouble with imported alloy sheets, cracking on folding, brown rust on welding, ect.
I've said it before and I'll say it again, the only way to stop them is not to support them, I ask for Australian made materials only, when it comes to fabrication, last thing I want is a customer coming back to me because I 'tight assed Charlie' on a job using inferior imported materials, let alone the thought that some materials broke and caused injury or death, bad ju ju :|