	US 12,077,840 B2
	6XXX aluminum alloy for extrusion with excellent crash performance and high yield strength and method of production thereof
Paula Camean Queijo, London (GB); Mehdi Ben Tahar, Grenoble (FR); Alexis Skubich, Lyons (FR); and Martin Jarrett, Oxfordshire (GB)
Assigned to CONSTELLIUM SINGEN GMBH, Singen (DE)
Appl. No. 17/049,715
Filed by CONSTELLIUM SINGEN GmbH, Singen (DE)
PCT Filed Apr. 18, 2019, PCT No. PCT/EP2019/060204 § 371(c)(1), (2) Date Oct. 22, 2020, PCT Pub. No. WO2019/206826, PCT Pub. Date Oct. 31, 2019.
Claims priority of application No. 18169106 (EP), filed on Apr. 24, 2018.
Prior Publication US 2021/0238721 A1, Aug. 5, 2021
Int. Cl. C22F 1/043 (2006.01); C22C 21/02 (2006.01)

CPC C22F 1/043 (2013.01) [C22C 21/02 (2013.01)]

18 Claims

1. An extruded product made of a 6xxx aluminum alloy comprising

0.40-0.70 wt. % Si,

0.40-0.80 wt. % Mg,

0.40-0.70 wt. % Cu,

up to 0.4 wt. % Fe,

up to 0.30 wt. % Mn,

up to 0.2 wt. % Cr,

up to 0.2 wt. % V,

up to 0.14 wt. % Zr,

up to 0.1 wt. % Ti,

up to 0.05 wt. % each impurity and 0.15% total, remainder aluminum,

wherein the ratio Mg/Si_freeis between 0.8 and 1.2 where Si_freeis calculated according to the equation Si_free=Si−0.3*(Mn+Fe) where Si, Mn and Fe correspond to the content in weight % of Si, Mn and Fe of said 6xxx aluminum alloy.