Copper alloy

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Copper alloy containing (wt.%) : Zn = 10.0, Sn = 13.0, Mn = 3.0, Al or Si (0.1-5-0) total, Ni = 2.0, P = 0.04, Pb = 3.0, Fe = 0.5, S = 0.04, Sb = 0.1, rare earth = 3.0, > 80% residual Cu and preferably not more than 0.25% impurities.