Patent ID: 8343635

Claim:
A multi-layered sheet of aluminum alloys, comprising: at least a core layer and a sacrificial layer, being clad, to be utilized for a heat exchanger by brazing, the core layer having an aluminum alloy composition comprising: Si: 0.2 to 1.5 mass %; Cu: 0.2 to 1.2 mass %; Mn: 0.2 to 1.4 mass %; Ti: 0.03 to 0.3 mass %; Fe: 1.0 mass % or less; and a balance being Al and inevitable impurities, and having a microstructure wherein a mean number density of dispersed particles, in which a mean value of centroid diameters observed by a 500-times SEM on a rolling plane of the core layer is 1 μm or more, is 7000 particles/mm 2 or less.