| 摘要 |
An aluminum alloy comprises 2.91-4.5 wt.% magnesium, 0.5-0.8 wt.% manganese, 0.05-0.3 wt.% copper, 0.05-0.3 wt.% chromium, 0.05-0.9 wt.% zinc, 0.4 wt.% or less iron, 0.25 wt.% or less silicon, 0.2 wt.% or less titanium, remainder of aluminum, and unavoidable impurities. The content of zinc, chromium, copper, manganese and magnesium is 0.05-0.15 wt.%. An aluminum alloy comprises 2.91-4.5 wt.% magnesium, 0.5-0.8 wt.% manganese, 0.05-0.3 wt.% copper, 0.05-0.3 wt.% chromium, 0.05-0.9 wt.% zinc, 0.4 wt.% or less iron, 0.25 wt.% or less silicon, 0.2 wt.% or less titanium, remainder of aluminum, and unavoidable impurities. The content of zinc, chromium, copper, manganese and magnesium is 0.05-0.15 wt.%, and satisfies the relation: (2.3x %Zn+1.25x %Cr+0.65x %Cu+0.05x %Mn)+2.4>= %Mg. Independent claims are included for the following: (1) use of aluminum alloy; and (2) manufacture of aluminum alloy strip and sheet. |
