Showa Denko K.k.

Nobuhiko Akagi

Kazuo Kimura

A method for manufacturing an Al&#x2014;Mg&#x2014;Si series alloy plate includes the steps of hot-rolling and subsequently cold-rolling an Al&#x2014;Mg&#x2014;Si series alloy ingot. The Al&#x2014;Mg&#x2014;Si series alloy ingot consists of Si: 0.2 to 0.8 mass %, Mg: 0.3 to 1 mass %, Fe: 0.5 mass % or less, Cu: 0.5 mass % or less, at least one of elements selected from the group consisting of Ti: 0.1 mass % or less and B: 0.1 mass % or less and the balance being Al and inevitable impurities. Heat-treating for holding a rolled ingot at 200 to 400&#xb0; C. for 1 hour or more is performed after a completion of the hot-rolling but before a completion of the cold-rolling.

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Sakai, Japan

Nobuhiko Akagi