美国的经济正处于稳定的增长期，对铝的需求以较大幅度上升，１９９８年铝的消费量（原铝产量＋进口量＋再生铝量）达 ９２５５．７０８ｋｔ，比 １９９７年的增加 ４．４％。向主要市场的净发货量如表 １所列（％）。 交通运输业已成为铝的最大消费市场，１９９８年的消费量为 The U.S. economy is in a period of steady growth with a sharp increase in demand for aluminum. In 1998, the consumption of aluminum (primary aluminum + imports + recycled aluminum) reached 9255.708kt, an increase of 4 over 1997. 4%. Net shipments to major markets are shown in Table 1 (%). Transportation has become the largest consumer market for aluminum, with consumption in 1998 being