US 11,851,736 B2
Hardenable aluminum alloy
Mark Erlwein, Neudenau (DE); Heinz Werner Höppel, Erlangen (DE); Felix Glöckel, Bamberg (DE); Bodo Gerold, Simbach am Inn (DE); Stefan Pogatscher, Leoben (AT); and Peter J. Uggowitzer, Ottenbach (CH)
Assigned to AMAG Rolling Gmbh, Braunau am Inn-Ranshofen (AT); and AUDI AG, Ingolstadt (DE)
Filed by AMAG Rolling GmbH, Braunau am Inn Ranshofen (AT); and AUDI AG, Ingolstadt (DE)
Filed on Nov. 16, 2018, as Appl. No. 16/192,928.
Claims priority of application No. 17202190 (EP), filed on Nov. 16, 2017; and application No. 18174637 (EP), filed on May 28, 2018.
Prior Publication US 2019/0144977 A1, May 16, 2019
Int. Cl. C22C 21/10 (2006.01); B21D 22/02 (2006.01); C22F 1/053 (2006.01)
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

OG Complex Work Unit Math
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.