Abstract: A wear-resistant copper-zinc alloy includes in mass %, 28 to 55% Zn, 0.5 to 2% P, and a balance of Cu and unavoidable impurities, and the wear-resistant copper-zinc alloy has an electrical conductivity of 10 to 33% IACS and a hardness of 3.6[Zn]-55 HBW or more, where [Zn] denotes the Zn content in mass %. Alternatively, a wear-resistant copper-zinc alloy includes in mass %, 40 to 55% Zn, 1 to 6% Mn, and a balance of Cu and unavoidable impurities, and the wear-resistant copper-zinc alloy has an electrical conductivity of 10 to 33% IACS and a hardness of 3.6[Zn]-55 HBW or more, where [Zn] denotes the Zn content in mass %.

Abstract: A wear-resistant copper-zinc alloy includes in mass %, 28 to 55% Zn, 0.5 to 2% P, and a balance of Cu and unavoidable impurities, and the wear-resistant copper-zinc alloy has an electrical conductivity of 10 to 33% IACS and a hardness of 3.6[Zn]-55 HBW or more, where [Zn] denotes the Zn content in mass %. Alternatively, a wear-resistant copper-zinc alloy includes in mass %, 40 to 55% Zn, 1 to 6% Mn, and a balance of Cu and unavoidable impurities, and the wear-resistant copper-zinc alloy has an electrical conductivity of 10 to 33% IACS and a hardness of 3.6[Zn]-55 HBW or more, where [Zn] denotes the Zn content in mass %.

Abstract: Provided is a copper alloy tube that is a drawn tube made from a CuCrZr alloy which suppresses the deterioration of mechanical strength and, in particular, the coarsening of crystal grains even in a temperature zone of a solutionizing treatment, and is thus excellent in high-temperature brazeability, as well as the manufacturing method therefor. The manufacturing method comprises a solutionizing step of heating and holding a tubular extrusion material at a solutionizing temperature of 900° C.