日本古河铝业公司开发成功机罩、门等汽车板材用的新铝合金“30—40合金”。通过添加镁约8％,拉伸强度提高到34～36公斤/毫米~2,延伸率增加到38％～40％,并持有汽车板材铝化不可缺少的高成形性。高镁添加铝合金板以工业规模制造成功在世界上尚属首次。为适应汽车重量减轻的需要,各家铝轧制公司都在致力于汽车板材铝化的新合金开 Japan’s Furukawa Aluminum Company developed a new aluminum alloy “30-40 alloy” for automobile panels, such as hoods and doors. By adding about 8% magnesium, tensile strength increased to 34 to 36 kg / mm2, elongation increased to 38% to 40%, and holds an automotive sheet aluminum indispensable high formability. For the first time in the world, the addition of high-magnesium aluminum plates to industrial-scale manufacturing is the success. In order to meet the needs of vehicle weight reduction, all aluminum rolling companies are committed to the car sheet aluminized new alloy open