What is the melting point of aluminum?

The melting point of pure aluminum is 660 degrees. Below 660 degrees aluminum is solid, above 660 degrees aluminum is liquid. But on the surface of aluminum, there are generally aluminum oxide films, which have a melting point of several thousand degrees Celsius. So aluminum that reaches melting point in normal life forms metallic aluminum droplets above 660 degrees. It doesn't drip because it's protected by an alumina film.

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