ALUMINUM ALLOY CLAD PLATE FOR HEAT EXCHANGER HAVING EXCELLENT EROSION RESISTANCE AND FORMABILITY

摘要

PROBLEM TO BE SOLVED: To provide an aluminum alloy clad plate which prevents the occurrence of erosion in the boundaries between a core material and brazing filler metals and has excellent formability. SOLUTION: The aluminum alloy clad plate 1 is obtained by cladding brazing filler metals 3 and 4 consisting of an Al-Si based aluminum alloy to both sides of a core material 2 consisting of an Al-Mn based aluminum alloy. The 0.2% proof stress of the clad plate 1 is controlled to 130 to 290% to the proof stress of a stock material. The core material 2 has a composition containing, by mass, 0.05 to 0.3% Cu, and the balance Al, Mn and Ti with inevitable impurities. At least one of the brazing filler metals 3 and 4 has a composition containing 7 to 13% Si and 1 to 10% Zn, and the balance Al with inevitable impurities.