Aluminum alloy plate for automobile body panel excellent in yarn rust resistance, paint bake hardenability and processability, and production method thereof, and automobile body panel using the same and production method thereof

摘要

PROBLEM TO BE SOLVED: To provide an aluminum alloy sheet for an automobile body panel excellent in filiform rust resistance and recycling property and a manufacturing method therefor, an automobile body panel using the same and a manufacturing method therefor.SOLUTION: An aluminum alloy sheet for an automobile body panel excellent in filiform rust resistance and recycling property, is made of an Al alloy containing Mg:0.30 to 0.80 mass% (hereafter referred to as "%"), Si:0.80 to 1.40%, Mn:0.20 to 0.65%, Zn:0.44 to 0.60%, Fe:0.25 to 0.40% and Cu:0.17 to 0.25%, has elongation of 23% at 100 days after solution heat treatment, bearing force after conducting coating galling treatment of 200 MPa or more and further point number in a Heming test based on JISH7701 of 0 to 2 point. The present invention also provides a manufacturing method for the aluminum alloy sheet, an automobile body panel using the aluminum alloy sheet and a manufacturing method therefor.SELECTED DRAWING: None