FIELD: metallurgy industry.
SUBSTANCE: invention relates to a brazing sheet of a laminated aluminium alloy and can be used in the manufacture of heat exchangers. The brazing sheet of the laminated aluminium alloy consisting of the material of the base layer, which on one or both sides has an intermediate layer composed of Al-Si brazing solder located between the base layer and a thin coating layer over the intermediate layer. And the material of the base layer and the coating layer has a higher melting point than the Al-Si brazing solder. The coating layer comprises, in weight %: Bi 0.01-1.00, Mg ≤ 0.05, Mn ≤ 1.0, Cu ≤ 1.2, Fe ≤ 1.0, Si ≤ 4.0, Ti ≤ 0.1, Zn ≤ 6, Sn ≤ 0.1, In ≤ 0.1, unavoidable impurities ≤0.05, Al - the rest.
EFFECT: brazing sheet can be soldered in an inert or reducing atmosphere without the need to use the flux that provides the strength of the brazed joint.
24 cl, 1 tbl, 7 ex
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