Nowadays people are glued to their phones.But few may care about the material of the cell phone body.
The three leading smart phone producers - Apple Inc(the USA), Samsang Corp.(South Korea) ,and Huawei Technologies （China） employ aluminum ,magnesium or titanium to the cell phone body.
Titanium is gergeous , but the cost is high, moreover its density is high.(The density of Ti is 66.7% higher than that of Al).Magnesium is magnificent and light , but its stength is lower than that of aluminum.Meanwhile, Mg does't have good corrosion resistance like aluminum;its price is also high. Thus,aluminum is now a good material for making cell phone body.It is cheap, and of good performamce, and it is also easy for recycling.
High strength 7075 and 6013 aluminum alloys are used for the body of some large-screen smart phones. Aluminum alloy increases the cell phone body's bending strength and damage resistance, and decreased its thickness and weight.
To solve the poor bending strength of hte cell phone body, iPhone 6S and iPhone 6S plus use 7075 aluminum plate for theirs bodies.7075 aluminum alloy is of the highest strength among all aluminum alloys.It is the best aluminum alloy for the cell phone body.