You should never ever get a "bad batch" of metal. Its nearly impossible to buy metals without certification, and I doubt the do this. So either its a bad batch and you can simply sue the metal manufacture for false certification and easily win.....or you crashed the truck. Doesnt matter if you think it was a bad crash, it was obviously bad enough to bend parts. Parts bend when they are pushed beyond the limits and thats it. If you dont think it should have bent, then the part wasnt properly engineered for your application.