JET Fuel Can't Melt Steel Beams http://www.theladbible.com/articles...y-theory-debunked-by-one-guy-who-s-had-enough The events that took place on 11 September 2001 changed the world. Since then, it seems that conspiracy theorists can't get over one minor quibble. Steel melts at 2,700 degrees celsius and jet fuel burns at 1,500 degrees celsius. Therefore, "9/11 was a conspiracy" because "jet fuel can't melt steel beams".