Patent ID: 8227091

Claim:
An aluminum alloy brazing sheet, comprising a core material, a sacrificial anode material formed in one face side of the core material, and a brazing filler metal made of an Al-Si based alloy formed in the other face side of the core material, wherein the sacrificial anode material has a composition comprising Fe: 0.03 to 0.30% by mass, Mn: 0.01 to 0.40% by mass, Si: larger than 0.4 and 1.4% or less by mass, Zn 2.0 to 5.5% by mass, Mg: 0.05% by mass or less, and Al and inevitable impurities and wherein the sacrificial anode material after a heat treatment of 600° C.×5 minutes has a crystal grain size in a range of from 100 to 400 μm.