Patent ID: 8216693
Filing Date: 2012-07-10
Classification: B23K,B32B,C22C,F28F,Y10T

Abstract:
1. A brazing sheet of aluminum alloy composed of a core material and a first brazing filler metal covering one surface of said core material, wherein said core material contains as an essential component 0.2-1.0 mass % of Cu and as optional components at least one species of no more than 1.5 mass % of Si, no more than 1.8 mass % of Mn, no more than 0.35 mass % of Ti, and no more than 0.5 mass % of Mg, with the remainder being Al and inevitable impurities, and said first brazing filler metal has a liquid phase ratio (X %) at 600° C. and a thickness (Y μm) such that X and Y satisfy the following relationship: wherein the first brazing filler metal contains 2.0-8.0 mass % of Si and 1.0-6.0 mass % of Zn, with the remainder being Al and inevitable impurities.