| 摘要 |
PROBLEM TO BE SOLVED: To provide an Al-Mg-Si aluminum alloy extruded-shape, which is superior in impact energy absorption when receiving an axially compressive impact load, and is suitable for structural members of automobiles and trains. SOLUTION: The Al-Mg-Si aluminum alloy extruded-shape has 150 N/mm<SP>2</SP>or higher of yield strength, and 60% or more of absorbed energy after the maximum load point against absorbed energy until reaching the maximum load point, in an instrumentation Charpy test. The aluminum alloy comprises 0.3-1.1% Mg, 0.5-1.3% Si, 0.05-0.7% Cu, 0.005-0.2% Ti, further one or more elements of 0.05-0.2% Zr, 0.05-0.5% Mn, and 0.001-0.2% Cr, and the balance Al with unavoidable impurities. COPYRIGHT: (C)2003,JPO
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