A brass alloy friendly manganese environment and its manufacturing method

A brass alloy friendly manganese environment comprising: 55-65% by weight decu a 1.0 to 6.5% by weight of Mn, 0.2-3.0% by weight of Al a 0-3.0 wt% Fe, 0.3-2.0% by weight one Desn a 0.01-0.3 wt% Mg, 0-0.3 wt% Bi and / or 0-0.2% by weight of Pb, the balance being Zn eimpurezas inevitable.