Patent ID: 7189294

Claim:
A method for manufacturing an Al—Mg—Si series alloy plate, the method comprising: hot-rolling and subsequently cold-rolling an Al—Mg—Si series alloy ingot, wherein said Al—Mg—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, and wherein heat-treating for holding a rolled ingot at 200 to 300° C. for 1 hour or more is performed after a completion of said hot-rolling but before a completion of said cold-rolling and no solution treating is performed after said completion of said cold-rolling.