Magnesium (Mg) is a common alloying element in aluminum alloys.
When added to aluminum, magnesium forms a compound called magnesium silicide (Mg2Si),It improves strength, hardness and corrosion resistance.

Magnesium also improves the workability of aluminum alloys,Making them easier to cut and shape.The strengthening of aluminum by magnesium is significant,for every 1% increase in magnesium, the tensile strength increases by approximately 34MPa.If less than 1% manganese is added, the strengthening effect can be supplemented.

Therefore, the addition of manganese can reduce the magnesium content and reduce the tendency of hot cracking.

Common alloys with higher magnesium content are Series 5 alloys,It has good corrosion resistance and weldability.

Aluminum sheet or aluminium plates with high magnesium content mainly have the following types, which are sorted by the amount of magnesium content: 5052 aluminum plates, 5754 aluminum plates, 5083 aluminum plates, 5A06 aluminum plates, among which 5083 and 5A06 aluminum plates have very high magnesium content, and their corrosion resistance is very good, so they are often used in the ship industry.