Al-Si-Mg aluminum alloy for casting excellent in specific rigidity, strength and ductility, cast member made thereof, and road wheel for automobiles

摘要

A casting Al-Si-Mg-based aluminum alloy comprising by mass 12.0-14.0% of Si, 1.5-4.0% of Mg, and 0.10% or less of Mn, the balance being Al and inevitable impurities, and having excellent specific rigidity, strength and ductility, and its cast member.