Abstract: A copper alloy for use in water works has not only a reduced lead content and the lowest possible Ni content, but also a reduced Bi content, and still exhibits suitable properties. The copper alloy includes: less than 0.5% by mass of Ni; 0.2% by mass or more and 0.9% by mass or less of Bi; 12.0% by mass or more and 20.0% by mass or less of Zn; 1.5% by mass or more and 4.5% by mass or less of Sn; and 0.005% by mass or more and 0.1% by mass or less of P; wherein the total content of Zn and Sn is 21.5% by mass or less, and the balance is a trace element(s) and Cu.

Abstract: It is an object of the present invention to obtain a copper alloy for use in a member for water works which inhibits leaching of Pb and exhibits suitable mechanical properties and castability, while restraining the amount of usage of Bi but securing the recyclability. The alloy of the present invention contains 0.5% by mass or less of Ni; 12% by mass or more and 21% by mass or less of Zn; 1.5% by mass or more and 4.5% by mass or less of Sn, a total content of Zn and Sn being 23.5% by mass or less; 0.005% by mass or more and 0.15% by mass or less of P; 0.05% by mass or more and 0.30% by mass or less of Pb; less than 0.2% by mass of Bi; and the balance, wherein the balance is Cu and unavoidable impurities.

Abstract: An object of the present invention is to provide a brass alloy, in which the content of Bi is reduced to secure a good recyclability while maintaining the dezincification corrosion resistance required for a member for water works, and which is capable of exhibiting an erosion-corrosion resistance and excellent mechanical properties to be used as a member for water works. This brass alloy contains: 24% by mass or more and 34% by mass or less of Zn; 0.5% by mass or more and 1.7% by mass or less of Sn; 0.4% by mass or more and 1.8% by mass or less of Al; 0.005% by mass or more and 0.2% by mass or less of P; and 0.01% by mass or more and 0.25% by mass or less of Pb; with the balance being copper and an unavoidable impurity(ies).

Abstract: Provided is a copper alloy for use in a member for water works, which has not only a reduced lead content and the lowest possible Ni content, but also a reduced Bi content, and which still exhibits suitable properties. The copper alloy includes: less than 0.5% by mass of Ni; 0.2% by mass or more and 0.9% by mass or less of Bi; 12.0% by mass or more and 20.0% by mass or less of Zn; 1.5% by mass or more and 4.5% by mass or less of Sn; and 0.005% by mass or more and 0.1% by mass or less of P; wherein the total content of Zn and Sn is 21.5% by mass or less, and the balance is a trace element(s) and Cu.