Al alloy brazing material and brazing sheet for heat-exchangers and method for fabricating al alloy heat-exchangers

Abstract From the Canadian patent

A typical aluminum alloy brazing material (A) disclosed comprises over 7.0 wt. % and not more than 12.0 wt. % of Si over 0.1 wt. % and not more than 8.0 wt. % of Cu over 0.05, wt. % and not more than 0.5 wt. % of Fe further at least one, kind selected from a group consisting of. over 0.5 wt. % and not more than 5.5 wt. % of Zn, over 0.002 wt. % and not more than 0.3 wt. % of In and over 0.002 wt. % and not more than 0.3 wt. % of Sn, and the balance of A1. and inevitable impurities. A typical aluminum alloy brazing sheet with a three-layer structure cladded comprises a brazing material (A), a core material (B) comprising over 0.6 wt. % and not more than 2.5 wt. % of Si, over 0.5 wt. % and …