铝的强度不及钢，但是当铝与少量的钢，锰和镁制成合金，并经过热处理后，其强度可以接近钢。
Aluminum is much less strong than steel. But when it is alloyed with small quantities of copper, manganese and magnesium and treated with heat, its strength may be close to steel.
铝的强度不及钢，但是当铝与少量的钢，锰和镁制成合金，并经过热处理后，其强度可以接近钢。
Aluminum is much less strong than steel. But when it is alloyed with small quantities of copper, manganese and magnesium and treated with heat, its strength may be close to steel.
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