(September 15, 2016 at 2:00 pm)Huggy74 Wrote:(September 15, 2016 at 8:32 am)Jörmungandr Wrote: Tell me how you know the molten material is steel and not aluminum?
It's unreasonable to assume otherwise seeing how aluminum is 3 times more expensive than steel.
Not really. Many of the non load supporting structures will be aluminium and other alloys. Also airliners are almost entirerly made of aluminium alloy.