Metal sheet for a motor vehicle body having high mechanical strength
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United States of America Patent
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Nov 10, 2020
Grant Date -
Jun 28, 2018
app pub date -
Jun 3, 2016
filing date -
Jun 5, 2015
priority date (Note) -
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Abstract
The subject matter of the invention is a sheet for stamped lining or structural parts for an auto body stilled referred to as a body-in-white, made of aluminum alloy having the following composition (% by weight): Si: 0.85-1.20, Fe: <0.30, Cu: 0.10-0.30, Mg: 0.70-0.90, Mn: <0.3; Zn: 0.9-1.60, V: 0.02-0.30, Ti: 0.05-0.20, other elements <0.05 each and <0.15 total, balance aluminum, having, after solution heat treatment, quenching, pre-aging or reversion, possible aging at ambient temperature for 72 hours to 6 months, 2% controlled tensile pre-deformation, and paint baking treatment for 20 minutes at 185° C., an elastic limit Rpo.2 of at least 300 MPa. The sheets according to the invention make it possible to reduce the thickness of the parts while still meeting all the other required properties.
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