Patent ID: 9546411
Date: 2017-01-17
CPC Classifications: C22C,C22F

Claim:
1. An aluminum-alloy sheet, comprising: 0.10 to 0.40 mass % of Si, 0.35 to 0.80 mass % of Fe, 0.10 to 0.35 mass % of Cu, 0.20 or more and less than 0.80 mass % of Mn, 1.5 to 2.5 mass % of Mg, and Al, wherein a content ratio of Si to Fe is 0.75 or less, a solute Mn content is 0.12 to 0.20 mass %, a total amount of Fe and Mn in the alumimun-alloy sheet exceeds 1%, and the aluminum-alloy sheet has a proof stress of 225 N/mm