目前我国铝的产量,在钢、铝、铅、锌四大品种总产量中约占36%,主要用于制作轻型结构材料、电器工业材料、耐蚀材料、包装材料等。铝的导电率是铜的61%,但由于铝的重量只有铜的三分之一,所以按重量计算铝的导电数超过铜。而且铝制导线比较容易冷却,不易被电流烧坏,能承受更大电流等,所以用铝作电线电缆比铜导线更为经济。随着我国电线电 At present, China’s aluminum production accounts for 36% of the total output of the four major varieties of steel, aluminum, lead and zinc, and is mainly used for making light structural materials, electrical industrial materials, corrosion-resistant materials and packaging materials. The conductivity of aluminum is 61% of that of copper, but because the weight of aluminum is only one-third of that of copper, the conductivity of aluminum exceeds that of copper by weight. And aluminum wire easier to cool, not easily be burned by current, can withstand greater current, so with aluminum wire and cable for copper wire is more economical. With China’s wire and cable