Which Al-Mg alloy has the highest hardness? (excluding other metal elements)

I don't know what kind of question you are mainly asking. Generally, aluminum-magnesium alloy refers to aluminum, magnesium and trace elements. How can it not contain other metal elements? If it is a brand with more aluminum content, the rigidity of AZ80 is still good. In fact, the strength of rigidity is not only the size of aluminum content. Because if the aluminum content is too high, the stress corrosion tendency of magnesium alloy will also increase, and the brittleness will also increase. Hardness is related to the composition of the material.