| 摘要 |
<p>The purpose of the present invention is to provide: an Al-Mg-Si type high-strength aluminum alloy extrudate which has excellent corrosion resistance and ductility and which has satisfactory hardenability during extrusion and thereby has high productivity; and a process for producing the extrudate. The extrudate is characterized by containing, in terms of mass%, 0.65-0.90% Mg, 0.60-0.90% Si, 1.0-1.3% Mg2Si as a stoichiometric composition, the excess of Si over the stoichiometric composition Mg2Si being 0.10-0.30% of the alloy composition, 0.20-0.40% Cu, 0.20-0.40% Fe, 0.10-0.20% Mn, Fe+Mn being 0.35% or more, and 0.005-0.1% Ti, with the remainder comprising aluminum and unavoidable impurities.</p> |
