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Originally Posted by TrackRat
Please stop your inappropriate posts micah 675-
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+1
Magneisum has some great properties, but the fire issue cannot be ignored. The flash point of a material is the same regardless of its form. It is 500C in a shaving or a block. (It is however alot easier to get a shaving to 500C than an engine block) It is quite difficult to get a large hunk of Magnesium to burn, however it can happen, and when you are talking about hundreds of thousands of cars, the chances of it happening are not insignificant.
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Originally Posted by 5erman
people keep saying aluminum is stronger-magnesium is a much stronger metal foilks--
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This is also not technically true. The tensile yield strength of Magnesium ranges from about 21-25ksi. Some Aluminum alloys have a tensile yield strength of >60ksi. (For comparison, some steels can get over 200ksi). However this doesn't tell the whole story as Magneisum is very light at only 1.7 g/cm^3 vs Aluminum at 2.7, and steel at 7.9.
Material selection is never as simple as which one is the strongest, or lightest. A whole range of features including strength, density, stiffness, fatigue, corrosion, availability, cost, machinability and so on have to be considered.
And lastly... micah_675 you lost any spec of credibility you had when you brought up Milk of Magnesia, Milk of Magnesia is Magnesium hydroxide (Mg(OH)2) and is as similar to Magnesium as Oxygen is to water.