As Neil points out with the Ronan Point example, British engineering doesn't have an entirely unblemished record when it comes to quality issues. I can recommend the book "Why Buildings Fall Down" by Levy and Salvadori. It says that the problems revealed by the Ronan Point collapse resulted in the demolition of "hundreds" of similarly unsafe tower blocks. Ronan Point itself was dismantled piecemeal because of concern that the building's structural integrity wouldn't support explosive demolition. "The joints between wall and slab, supposedly packed with mortar, were discovered to be full of voids and rubbish."
Returning to steel, this LINK gives production figures by country for 2014 – 2015. The annual total is 1,496,105,000 tonnes. This is a huge quantity of metal and I don't find it surprising that some of it isn't to specification. Does anyone have any figures showing the percentage of steel production that's faulty, rather than quoting individual examples of poor quality? Individual reports are unreliable because people are less likely to report good experiences. Failures are much more interesting than anything that "just works".
Regards,
Dave