ALUMINUM ALLOY CLADDING MATERIAL FOR HEAT EXCHANGER

An aluminum alloy clad material for heat exchangers exhibits excellent brazability and excellent external surface corrosion resistance, and is suitable for use as a tube material or a tank or header material in an aluminum alloy heat exchanger manufactured by brazing. The aluminum alloy clad material is a three-layer clad material that includes a core material, a cladding material 1, and a cladding material 2, one side of the core material being clad with the cladding material 1, the other side of the core material being clad with the cladding material 2, the core material including an aluminum alloy that includes 0.5 to 1.8% of Mn, and limited to 0.05% or less of Cu, with the balance being A1 and unavoidable impurities, the cladding material 1 including an aluminum alloy that includes 3 to 10% of Si, and 1 to 10% of Zn, with the balance being A1 and unavoidable impurities, and the cladding material 2 including an aluminum alloy that includes 3 to 13% of Si, and limited to 0.05% or less of Cu, with the balance being A1 and unavoidable impurities, wherein the Si content X (%) in the cladding material 1 and the Si content Y (%) in the cladding material 2 satisfy the value (Y-X) is -1.5 to 9%, and the aluminum alloy clad material is used in a state in which the cladding material 1 comes on the air side.