Nissan Motor Company Limited

Nippon Light Metal Company, Ltd.

Akio Yoshizawa

Toshiya Anami

Pizhi Zhao

Takeshi Handa

Tomoyuki Hirayama

Tsutomu Hattori

Yusuke Nagaishi

Koji Itakura

Shigenori Yoshizawa

Hirokazu Miyagawa

An aluminum alloy sheet includes an aluminum alloy substrate having a composition containing, by mass percentage, 3.0 to 4.0% of magnesium, 0.2 to 0.4% of manganese, 0.1 to 0.5% of iron, not less than 0.03% but less than 0.10% of copper, and less than 0.20% of silicon, with the remainder being aluminum and unavoidable impurities. A peak concentration of a copper concentration distribution in a thickness direction in a region at a depth of 15 nm to 200 nm from the surface of the aluminum alloy substrate is equal to or more than 0.15%, and the aluminum alloy substrate has a recrystallized structure with an average grain size of 15 &#x3bc;m or less.

Aluminum alloy sheet and method for manufacturing same

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Tochigi, Japan

Akio Yoshizawa