Patent ID: 10155289

Abstract:
A pressure resistant and corrosion resistant copper alloy contains 73.0 mass % to 79.5 mass % of Cu and 2.5 mass % to 4.0 mass % of Si with a remainder composed of Zn and inevitable impurities, in which the content of Cu [Cu] mass % and the content of Si [Si] mass % have a relationship of 62.0≤[Cu]−3.6×[Si]≤67.5. In addition, the area fraction of the α phase “α”%, the area fraction of a β phase “β”%, the area fraction of a γ phase “γ”%, the area fraction of the κ phase “κ”%, and the area fraction of a μ phase “μ”% satisfy 30≤“α”≤84, 15≤“κ”≤68, “α”+“κ”≥92, 0.2≤“κ”/“α”≤2, “β”≤3, “μ”≤5, “β”+“μ”≤6, 0≤“γ”≤7, and 0≤“β”+“μ”+“γ”≤8. Also disclosed is a method of manufacturing a brazed structure made of the above pressure resistant and corrosion resistant copper alloy.