Mg-BASE ALLOY

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An Mg-base alloy containing Zn and Al, characterized in that when the composition is represented by the formula : (100-a-b)wt%Mg – awt%Al – bwt%Zn, the relationship : 0.5 ≤ b/a is satisfied.  An Mg-base alloy which can attain a reduction in yield anisotropy with the tensile strength kept at a high level is provided by using easily available additional elements instead of rare earth elements, yield anisotropy being a significant problem of malleable magnesium alloys.