Aluminum alloy brazing sheet, method of producing said brazing sheet, heat-exchanger using said brazing sheet and method of producing said heat-exchanger

摘要

Disclosed is a brazing sheet for heat-exchanger tube with three-layer structure in a thickness of not more than 0.25 mm, using an aluminum alloy comprising over 0.2 wt. % and not more than 2.5 wt. % of Si, over 0.05 wt. % and not more than 2.0 wt. % of Fe, over 0.7 wt. % and not more than 2.5 wt. % of Cu, over 0.05 wt. % and not more than 2.0 wt. % of Mn and the balance of aluminum and inevitable impurities as a core material, cladded one side thereof with aluminum alloy comprising over 3.0 wt. % and not more than 6.0 wt. % of Zn, over 0.05 wt. % and not more than 2.5 wt. % of Mg and the balance of aluminum and inevitable impurities in a thickness of over 46 mu m and not more than 70 mu m as a sacrificial material, and cladded other side thereof with brazing material comprising aluminum alloy. The purpose is to provide an aluminum alloy brazing sheet, which enables to lighten the heat-exchanger and which has high strength after brazing and excellent corrosion resistance.