High proof stress Al—Zn aluminum alloy extrusion material superior in bendability
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United States of America Patent
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Feb 12, 2019
Grant Date -
Nov 19, 2015
app pub date -
May 8, 2015
filing date -
May 13, 2014
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Abstract
A high proof stress aluminum alloy extrusion material having superior bendability and crack resistance. The high proof stress aluminum alloy extrusion material is an aluminum alloy comprising: 5.0 to 7.0 wt % of zinc; 0.5 to 1.5 wt % of magnesium; 0.05 to 0.3 wt % of copper; no greater than 0.15 wt % of zirconium; 0.1 to 0.4 wt % of iron; 0.05 to 0.4 wt % of silicon; with the balance being Al and impurities, in which at least 90% of a metallographic structure is a recrystallized structure.
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