What is the Difference Between Aluminum and Magnesium?

The main differences between aluminum and magnesium lie in their physical properties, density, and applications. Here are some key differences between the two:

1. Density: Aluminum has a density of 2.70 g/cm³, while magnesium has a lower density of 1.74 g/cm³, making magnesium the lightest structural metal.
2. Melting Point: Aluminum has a higher melting point of around 660°C (1220°F), while magnesium has a lower melting point of approximately 650°C (1202°F).
3. Rigidity: Aluminum is more rigid than magnesium, making it best suited for moderate to mild climates. Magnesium, on the other hand, is more flexible and is the better option for cold climates or freezer deliveries.
4. Strength and Ductility: While magnesium is lighter and has a lower melting point, aluminum is stronger and more ductile.
5. Weight Savings: The lower density of magnesium allows for significant weight savings compared to aluminum, with magnesium being 66% of aluminum's density.

In summary, aluminum is more rigid and stronger, making it suitable for a wide range of applications, while magnesium is lighter and more flexible, with lower density and melting point. The choice between aluminum and magnesium depends on the specific requirements of the application, such as weight, strength, and operating conditions.

Comparative Table: Aluminum vs Magnesium

Here is a table comparing the differences between aluminum and magnesium:

Aluminum and magnesium are both metals with similar appearances, but they have distinct differences. Aluminum is corrosion resistant, has three valence electrons, and is denser than magnesium. On the other hand, magnesium is not corrosion resistant, has two valence electrons, and is less dense than aluminum. They also have different applications, with aluminum being used in various industries and magnesium being essential for biological growth and development.