Is aluminum stronger than steel?
Nope, to check this answer, do an experiment: hammer a piece of aluminum foil. You will see that it creases easily wheres steel cannot be broken down easily.
However, aluminum is also more light-weight than steel. Aluminum is cheaper to manufacture, easier to bend as needed into a variety of shapes, can be shipped more easily (less weight=less cost), and makes many items lighter in weight (cars, airplanes, etc.)
The one big drawback is that cars used to have steel bumpers. Since most are now steel or plastic, and bumpers are often the first to make contact with another car or object, the bumper is less sturdy now than when it was steel.
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So let us get this straight for the record 11 years after the fact of the most abhorrent crime perpetrated in this century so far.....Two "hijacked" planes hit the WTC Nth and Sth towers piercing the steel construction, exploded inside, left gaping holes in the steel buildings in the shape of the wings of the planes and made the buildings pancake into their own footprint after 2 hours maximum after the planes hit the buildings.
9-11 Truthers are crazy and unpatriotic aren't they
9-11 Never Forget .... Never forget the Government did it!