Metal treatment – Stock – Aluminum base
Patent
1995-06-09
1999-01-26
Ryan, Patrick
Metal treatment
Stock
Aluminum base
420532, 420533, 420535, 420543, 420537, 148417, C22C 2100
Patent
active
058633596
ABSTRACT:
There is claimed a lower wing structure for a commercial jet aircraft which includes a substantially unrecrystallized rolled plate member made from an aluminum alloy consisting essentially of about 3.6 to 4.0 wt. % copper, about 1.0 to 1.6 wt. % magnesium, about 0.3 to 0.7 wt. % manganese, about 0.05 to 0.25 wt. % zirconium, the balance aluminum and incidental elements and impurities. On a preferred basis, the alloy products of this invention include very low levels of both iron and silicon, typically on the order of less than 0.1 wt. % each, and more preferably about 0.05 wt. % or less iron and about 0.03 wt. % or less silicon. This alloy composition may be rolled to form lower wing skin plates and extruded or rolled to form wing box stringers therefrom.
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Bray Gary H.
Karabin Lynette M.
Liu John
Warren Allison S.
Aluminum Company of America
Elve M. Alexandra
Ryan Patrick
Topolosky Gary P.
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