Magnesium will not catch on fire unless it is small chips or a dust (being in a form that allows the most amount of oxygen to enter into the atomic structure) and then high heat applied. I don't think this is a problem for you.
Magnesium is the lightest engineering metal (excluding exotic metals like beryllium and lithium). As a pure metal it is very weak, so all engineered magnesium products are alloys with about 10% aluminum and 1% zinc.
For hitting potholes; the modulus of elasticity (stiffness) of magnesium alloys is 6.5 million PSI, carbon-fibers can exceed 100 million PSI ( but it won't indicate any bending of flexing if this is exceeded, it will shatter), aluminum is 10 million PSI, but's it's heavier than both mag and CF.
***Audiosolstice- please correct me, but I thought that one of the first manned missions to space, NASA used pure oxygen for the astronauts to breathe, which later combusted and blew the thing out of the sky
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Last edited by Mr.TrevorClever; 03-27-2005 at 09:55 PM.