An aluminum alloy com-prised of aluminum (Al) 90%, with the remaining 10% constituting mag-nesium, silicon, and an intermetallic compound of dialuminum calcium (Al2Ca).
A magnesium (Mg) alloy, which is the lightest type of structural metal. This alloy is comprised of 90% Mg, 1-9% luminum, with trace amounts of alloy-ing elements zinc and manganese, as well as an intermetallic compound of dialuminum calcium
(Al2Ca).