US 12,319,989 B2
High strength press quenchable 7XXX alloy
David J. Shoemaker, Heath, OH (US); Timothy K. Fargo, Southfield, MI (US); Walter Gerberick, Westerville, OH (US); and Robert A. Matuska, Heath, OH (US)
Assigned to Kaiser Aluminum Fabricated Products, LLC, Franklin, TN (US)
Filed by Kaiser Aluminum Fabricated Products, LLC, Foothill Ranch, CA (US)
Filed on Jun. 11, 2020, as Appl. No. 16/899,301.
Claims priority of provisional application 62/944,200, filed on Dec. 5, 2019.
Prior Publication US 2021/0172044 A1, Jun. 10, 2021
Int. Cl. C22C 21/10 (2006.01); C21D 8/00 (2006.01); C21D 9/00 (2006.01)
CPC C22C 21/10 (2013.01) [C21D 8/00 (2013.01); C21D 9/0081 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An extruded, forged or rolled product manufactured from a 7xxx series aluminum alloy having a composition consisting of, (by weight %):
1.0-1.8% Mg
7.3-8.3% Zn
0.10-0.25% Zr
0.02-0.40% Cu
≤0.3% Si
≤<0.4% Fe
≤<0.4% Mn
≤<0.1% Ti
4.0-9.9% MgZn2
with other elements restricted as unavoidable impurities limited to 0.05% each and 0.15% total; and the balance aluminum, wherein
said extruded, forged or rolled product has a low quench sensitivity as defined as achieving 95% of maximum mechanical properties via forced air quenching.