RR a good example is the corners on my ICC case which are TIG welded plus the full length rod that runs thru the hinges and locks with a padlock. For all around use and not flying too much the regular Basspro shop aluminum would be ok but you never know when someone will run over the case with some aircraft loading/unloading machinery

. Sadly I have seen guys unload their cases at airports on very expensive hunts with plastic cases.