Abstract: A lead-free brass alloy contains 57.0 to 60.0% wt. Cu, 1.0 to 2.0% wt. Al, 1.5 to 2.5% wt. Mn, 0.1 to 1.0% wt. Fe, at most 0.5% wt. Ni, at most 0.5% wt. Sn, 0.5 to 2.0% wt. Si, less than 0.1% wt. Pb, balance Zn and also unavoidable impurities. Wherein the copper equivalent (CuEq) is in the range from 52.0 to 58.0%.

Abstract: A milking device for milking dairy cattle contains at least one teat cup which is connected to a milk-collecting container by a hose. In order to simplify the production of the milking device, at least one surface coming in contact with the milk or one component of the teat cup and/or of the milk-collecting container is made of an alloy that contains at least 50% Cu and, as a further alloying constituent, at least 2% Zn or at least 2% Sn.