ALUMINUM ALLOY EXTRUDED PRODUCT EXHIBITING EXCELLENT IMPACT CRACKING RESISTANCE AND IMPACT ABSORBER

摘要

An aluminum alloy extruded product that exhibits excellent impact cracking resistance is formed of an aluminum alloy that includes 0.50 to 0.75 mass % of Mg, 4.5 to 6.5 mass % of Zn, 0.10 to 0.20 mass % of Cu, 0.17 to 0.23 mass % of Zr, 0.005 to 0.05 mass % of Ti, 0.05 mass % or less of Mn, 0.03 mass % or less of Cr, 0.20 mass % or less of Fe, and 0.10 mass % or less of Si, with the balance being Al and unavoidable impurities.