Patent ID: 6627330
Filing Date: 2003-09-30
Classification: B23K,B32B,F28D,F28F,Y10S,Y10T

Abstract:
An aluminum alloy brazing sheet with a quad-layer structure consisting of an outer filler material, intermediate layer material, core material, and inner filler material, laminated in that order from the outer surface, wherein the core material consists of 0.5-1.6% of Mn, 0.10-0.50% of Cu, 0.05-0.50% of Mg, and 0.06-0.30% of Ti, and, as impurities, 0.5% or less of Fe, 0.5% or less of Si, and 0.1% or less of Zn, with the remainder being Al and unavoidable impurities; the intermediate layer material consists of 0.2-1.5% of Mg and at least one of 0.5-4% of Zn, 0.005-0.2% of In, and 0.01-0.2% of Sn, and, as impurities, 0.3% or less of Si, 0.3% or less of Fe, 0.05% or less of Cu, 0.05% or less of Mn, and 0.3% or less of Ti, with the remainder being Al and unavoidable impurities, wherein the thickness of the intermediate layer material is 50 &mgr;m or more and no greater than the thickness of the core material, the outer filler material is an Alâ€”Siâ€”Mg alloy containing 0.005-0.2% of In and the inner filler material is an Alâ€”Siâ€”Mg alloy.