Patent ID: 8113414

Claim:
A method of brazing an aluminum alloy material, comprising: selecting an aluminum alloy filler material and a flux comprising KAlF 4 and K 2 AlF 5 .H 2 O satisfying the following condition: Ts≦Tf ≦Ts+ 6° C., wherein Tf represents an incipient fluidization temperature of the filler material, and Ts represents an incipient fluidization temperature of the flux; providing a brazing sheet comprising an aluminum alloy core material, and the aluminum alloy filler material; providing the flux comprising KAlF 4 and K 2 AlF 5 .H 2 O; and brazing the aluminum alloy material by heating the filler material and the flux wherein the aluminum alloy core material contains 0.05 mass % or more and 2 mass % or less of magnesium.