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Abstract

Multilayered brazing sheet including aluminium core alloy layer of 3xxx-series aluminium 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 0.07% Mg, up to 0.2% Cr, up to 0.25% Zr, up to 0.2% Ti, up to 0.15% Zn, balance aluminium and impurities, first and second brazing clad layers on opposed faces of core layer, and an inter-layer on either or both sides of core layer between the core layer and first or second brazing clad layer. The first and second brazing layers are 4xxx-series aluminium alloy. The inter-layer(s) is 3xxx-series aluminium alloy, having, in wt. %, up to 0.6% Si, 0.2% to 0.7% Fe, up to 0.2% Cu, 1.0% to 1.6% Mn, up to 0.25% Zn, up to 0.04% Mg, up to 0.2% Cr, up to 0.2% Zr, up to 0.07% Ti, balance aluminium and impurities.

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First Claim