The aluminum alloy component and its production manner null Si which are superior in

摘要

PROBLEM TO BE SOLVED: To provide an aluminum alloy sheet excellent in anti-crushability, processability into a complicated shape and having high strength, and to provide a method for producing parts using the same. ;SOLUTION: This aluminum alloy sheet has a composition containing, by mass, 0.4 to 0.8% Si, 0.4 to 0.8% Mg, ≤0.3% Fe and ≤0.3% Mn, and the balance Al with inevitable impurities. The grain size in the sheet thickness direction of the crystal grains in the cross-section in the sheet thickness direction parallel to the rolling direction is defined as [rt], and the grain size in the rolling direction of the crystal grains is defined as [rl], the average value of [rt] is ≤100 μm, and the average value of [rl]/[rt], i.e., is ratio between [rl] and [rt] is ≥2. This aluminum alloy sheet is press-formed into a prescribed shape and is thereafter raised its strength to ≥230 MPa by artificial aging treatment.;COPYRIGHT: (C)2001,JPO