铝的最大优点之一是密度小,仅为2700千克/米~3。铝中添加某些合金元素,合金的密度会有所变化。添加重金属元素(如Cu)使合金密度增加,添加轻金属元素(如Mg)使合金密度减小。 铝中添加金属锂,轻化效果非常明显,因为锂的密度只有530千克/米~3。含有1％～2.7％Li的铝合金要 One of the biggest advantages of aluminum is the low density of only 2700 kg / m ~ 3. Some aluminum alloy elements added, the alloy density will change. Adding heavy metal elements (such as Cu) to increase the density of the alloy, the addition of light metal elements (such as Mg) to reduce the density of the alloy. Aluminum metal lithium added, light effect is very obvious, because the density of lithium is only 530 kg / m ~ 3. Aluminum alloy containing 1% ~ 2.7% Li