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Abstract

Multilayered brazing sheet material including an aluminum core alloy layer having a first brazing clad layer material on one face of the core layer and a second brazing clad layer material on the other face of the core material, and an inter-layer between the core layer and the first brazing clad layer material, wherein the core layer is 3xxx-series aluminum alloy having, in wt. %, up to 0.4% Si, up to 0.5% Fe, 0.4% to 0.75% Cu, 0.6% to 1.1% Mn, up to 0.04% Mg, up to 0.2% Cr, up to 0.25% Zr, up to 0.2% Ti, up to 0.15% Zn, balance aluminum and impurities, wherein the first brazing layer and the second brazing layer are 4xxx-series aluminum alloy having 7% to 14% Si and up to 2% Mg, balance aluminum and impurities, and wherein the inter-layer is aluminum alloy of the 1xxx-series alloys.

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First Claim