CPC C22C 21/10 (2013.01) [B21D 22/02 (2013.01); C22F 1/053 (2013.01)] | 21 Claims |
1. An aluminum sheet or strip composed of a tempered aluminum alloy, the tempered aluminum alloy consisting of:
2.5 to 3.5 wt. % zinc (Zn),
0.5 to 1.5 wt. % magnesium (Mg),
0.2 to 0.8 wt. % silicon (Si),
0.005 to 0.2 wt. % tin (Sn) and/or indium (In) and/or cadmium (Cd), and optionally
up to 0.35 wt. % copper (Cu),
up to 0.3 wt. % silver (Ag),
up to 0.25 wt. % iron (Fe),
up to 0.12 wt. % manganese (Mn),
up to 0.15 wt. % titanium (Ti),
and balance aluminum and inevitable impurities where each of the inevitable impurities amounts to at most 0.05 wt. % and the inevitable impurities all together amount to at most 0.15 wt. %, wherein the magnesium (Mg) and silicon (Si) fulfill the relation
and the tempered aluminum alloy is in a T4 state with a stabilization annealing treatment T4-FH, having a first yield strength Rp0.2 of at most 160 MPa.
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