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A calcium-bearing magnesium and rare earth element alloy consists essentially of, in mass percent, zinc (Zn) : 1 - 3%; aluminum (Al) : 1 - 3%; calcium (Ca) : 0.1 - 0.4%; gadolinium (Gd) : 0.1 - 0.4%; yttrium (Y) : 0 - 0.4%; manganese (Mn) : 0 - 0.2%; and balance magnesium (Mg).