Aluminum alloy and extrusion
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United States of America Patent
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Aug 28, 2012
Grant Date -
Jul 10, 2008
app pub date -
Mar 14, 2008
filing date -
Apr 15, 1996
priority date (Note) -
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Abstract
A population of extrusion billets has a specification such that every billet is of an alloy of composition (in wt. %): Fe<0.35; Si 0.20-0.6; Mn<0.10; Mg 0.25-0.9; Cu<0.015; Ti<0.10; Cr<0.10; Zn<0.03; balance Al of commercial purity. After ageing to T5 or T6 temper, extruded sections can be etched and anodised to give extruded matt anodised sections having improved properties.
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