You do know DOM has a seam right?
And when you bend metal you put it in its plastic range, so you add strength to it. It then takes even more force to get it to bend again, until you reach the UTS, and it breaks. Its called cold working, DOM is erw, cold worked to its finally size.
yes i know it has a seem, its different though, that's why DOM is stronger then HREW thats a fact.
and if you bend HREW wrong you can make it weaker and there's not a wrong way to bend DOM.
