Magnesium alloy is an alloy composed of magnesium and other elements.

It is characterized by low density (about 1.8g/cm3 magnesium alloy), high specific strength, large specific elastic modulus, good heat dissipation, good shock absorption, greater impact load bearing capacity than aluminum alloy, and good corrosion resistance to organic matter and alkali.

The main alloy elements are aluminum, zinc, manganese, cerium, thorium and a small amount of zirconium or cadmium. At present, magnesium aluminum alloy is the most widely used, followed by magnesium manganese alloy and magnesium zinc zirconium alloy.

It is mainly used in aviation, aerospace, transportation, chemical industry, rocket and other industrial departments.