Process for producing a thin sheet suitable for making up constituent elements of cans
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United States of America Patent
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Apr 1, 1997
Grant Date -
N/A
app pub date -
Apr 24, 1995
filing date -
Jul 16, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a process for producing, by casting between rolls, an aluminum alloy sheet suitable for making up constituent elements of cans for food use, the aluminum alloy containing (by weight) between 1 and 4% of Mg and between 0 and 1.6% of Mn, the process being characterized in that said sheet is obtained by casting of said alloy in the liquid state between two rolls in the form of a strip having a thickness of at most 4 mm followed by at least one heat treatment at a temperature between 400.degree. and 580.degree. C. so that the sheet is at least partially recrystallized and cold-rolling to a final thickness of less than 0.3 mm. The sheet obtained has a yield stress, a formability index and a resistance of the coating to delamination which are improved and make it suitable for application to can manufacture and, in particular, to can lids.
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