Aluminum alloy extrusions with excellent axial collapse characteristics

摘要

PROBLEM TO BE SOLVED: To provide an alminum alloy extruded shape material excellent in axial collapse characteristics and suitable as an automotive structural member such as a side member or the like. ;SOLUTION: This aluminum alloy extruded shape material is the one in which, in a stress-strain diagram in the case of a tensile test, to the area (B part) surrounded by the stress-strain diagram, the area (A part) surrounded by the tangent of the maximum stress point, the straight line obtd. by connecting the fracture strain point and the fracture stress point and the stress-strain diagram from the maximum stress point to the fracture stress point is ≥0.7%. As the aluminum alloy, an Al-Mg-Si alloy contg., by weight, 0.3 to 1.6% Mg, 0.2 to 1.6% Si, 0.2 to 1.0% Cu and 0.005 to 0.2% Ti is suitable.;COPYRIGHT: (C)2000,JPO