WROUGHT ALUMINIUM AA7000-SERIES ALLOY PRODUCT AND METHOD OF PRODUCING SAID PRODUCT
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United States of America Patent
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app pub date -
Dec 4, 2006
filing date -
Jul 21, 2005
priority date (Note) -
Abandoned
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Abstract
A wrought aluminium AA7000-series alloy product, including (in wt %): Zn 7.5 to 14.0, Mg 1.0 to 5.0, Cu<0.28, Fe<0.6, Si<0.5, and one or more members selected from the group of: Zr<0.30, Ti<0.30, Hf<0.30, Mn<0.80, Cr<0.40, V<0.40, and Sc<0.70, remainder: incidental elements and impurities, each <0.05, total <0.15, and balance aluminium. The product has reduced hot crack sensitivity, and improved strength and toughness properties, and has a hardness of more than 180 HB in artificially aged condition.
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