Autobody skin piece made of an al-si-mg sheet metal alloy and fixed to a steel structure
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United States of America Patent
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N/A
Issued Date -
Aug 23, 2007
app pub date -
Jun 17, 2004
filing date -
Jun 18, 2003
priority date (Note) -
Abandoned
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Abstract
Auto body roof comprising at least one steel part and a skin part made of an aluminum alloy that is attached to the steel part before painting. The aluminum part comprises a sheet of the following composition: Si: 0.7-1.3, Fe<0.5, Cu: 0.5-1.1, Mn: 0.4-1.0, Mg: 0.6-1.2, Zn<0.7, Cr<0.25, Zr+Ti<0.20, other elements <0.05 each and <0.15 total, and the remainder aluminium. The aluminum part, after solution treatment, quenching and age-hardening for three weeks at room temperature, possesses a yield strength R.sub.0.2 of less than 170 MPa, and preferably 160 MPa.
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Cited Art Landscape
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