What elements are magnesium alloys composed of?

Magnesium alloy is an alloy composed of magnesium as the base and other elements added. Its characteristics are: low density (about 1.8g/cm3 magnesium alloy), high specific strength, high specific elastic modulus, good heat dissipation, good shock absorption, greater impact load capacity than aluminum alloy, and good corrosion resistance to organic matter and alkali. The main alloying elements include aluminum, zinc, manganese, cerium, thorium, and a small amount of zirconium or cadmium. At present, the most widely used is magnesium aluminum alloy, followed by magnesium manganese alloy and magnesium zinc zirconium alloy. Mainly used in industrial sectors such as aviation, aerospace, transportation, chemical engineering, and rockets. Among practical metals, magnesium is the lightest metal, with a specific gravity of approximately 2/3 that of aluminum and 1/4 that of iron. It is the lightest metal among practical metals, with high strength and rigidity.