The main element of aluminum magnesium alloys is aluminum, and a small amount of magnesium or other metal materials are added to strengthen their hardness. Because itself is a metal, its thermal conductivity and strength is particularly outstanding.

Aluminum and magnesium alloys are strong and light in quality, low in density, good in heat dissipation, and strong in compression resistance, which can fully meet the requirements of 3C products for high integration, lightness, miniaturization, anti-crash, electromagnetic shielding and heat dissipation. It is several times as hard as conventional plastic cases but only a third as heavy, and is commonly used in the middle and upper end of ultra-thin or small laptop cases. What's more, the silver-white magnesium-aluminum case makes the product more luxurious and aesthetically pleasing. It's also easy to color, and can be finished in personalized pink-blue and pink colors that engineering plastics and carbon fibers can't match.

As a result, al-mg alloy has become the first choice of the case material for portable notebook computers. At present, most of the laptop products of manufacturers have adopted al-mg alloy case technology. Disadvantages: magnesium aluminum alloy is not very strong wear resistant, high cost, more expensive, and forming than ABS is difficult (need to use stamping or die casting process), so notebook computers generally only use aluminum magnesium alloy on the top cover, few models with aluminum magnesium alloy to manufacture