Flux-free brazing aluminum alloy brazing sheet

An aluminum alloy brazing sheet used for brazing in an inert gas atmosphere without using a flux, the aluminum alloy brazing sheet comprising:

• a core material;
• an intermediate material cladded onto one side surface of the core material;
• and
• a brazing material cladded onto a side surface of the intermediate material opposite to a side surface on which the core material exists, wherein
• the core material is formed of aluminum alloy consisting of Si of 0.50 to 0.90 mass %, Cu of 0.30 to 2.50 mass %, and Mn of 1.40 to 1.80 mass %, with a Mg content limited to 0.05 mass % or less, and with the balance being Al and inevitable impurities,
• the intermediate material is formed of aluminum alloy consisting of Mg of 0.40 to 1.00 mass %, and Zn of 2.00 to 6.00 mass %, optionally Mn, with the balance being Al and inevitable impurities, and
• the brazing material is formed of aluminum alloy consisting of Si of 6.00 to 13.00 mass %, Mg of 0.05 to 0.40 mass %, and Bi of 0.010 to 0.050 mass %, optionally Sr, optionally Cu, with the balance being Al and inevitable impurities.