| 摘要 |
A weldable aluminum alloy workable into sheet form containing Si, Mg and Cu, and a process for its production are disclosed. The alloy comprises (in percent by weight) proportions of Si and Mg as defined by a trapezium having the following co-ordinates: -Si Mg -(A) 0.5 0.1 -(B) 0.5 0.2 -(C) 1.3 0.5 -(D) 1.3 0.1 - Cu: 0.1-0.5; Mn: 0-0.2; Ti: 0-0.1; Fe: 0-0.35; other impurites each: </=0.05 total impurity content: </=0.15 balance Al. The production procedure comprises semi-continuous or continuous casting of blanks, an optional homogenisation operation, a hot transformation operation which is terminated in the range of 270 DEG to 340 DEG C., an optional cold transformation operation, a complete solution treatment, a shaping operation using stamping or pressing, folding, bending, etc . . . , and a tempering operation.
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