Aluminum alloy for automobile wheels and automobile wheels

Abstract

To provide an aluminum alloy for an automobile wheel improved in tensile characteristics, modulus of longitudinal elasticity and corrosion resistance and to provide an automobile wheel.SOLUTION: There is provided an aluminum alloy for an automobile wheel which comprises Si in the range of 8.5 wt.% or more and 10.5 wt.% or less, Cu in the range of 0.8 wt.% or more and 1.1 wt.% or less, Mg in the range of 0.4 wt.% or more and 0.6 wt.% or less, Mn in the range of 0.30 wt.% or more and 0.60 wt.% or less, Fe in the range of 0.10 wt.% or more and 0.30 wt.% or less, Cr in the range of 0.01 wt.% or more and 0.03 wt.% or less and the balance Al with inevitable impurities, wherein the aluminum alloy does not contain 2 or more crystallized products containing 1 mass% or more of Cu and having a circle equivalent diameter of more than 5 μm per 1182 μm2, does not contain 2 or more Cr-containing intermetallic compounds having a length of 8 μm or more per 1182 μm2 and does not contain 2 or more primary Si grains having a circle equivalent diameter of more than 10 μm per 4726 μm2.SELECTED DRAWING: Figure 1

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