Hartlötblech

摘要

The invention relates to a brazing sheet with a two-layer structure or a three-layer structure, having a core sheet made of an aluminium alloy core material and on one side or both sides thereof a brazing layer of an aluminium alloy containing silicon as main alloying element, wherein the aluminium alloy of the core sheet has the composition (in weight %):- Mn 0.5 to 1.5 Cu 0.5 to 2.0 Si 0.3 to 1.5 Mg < 0.05 Fe < 0.4 Ti <0.15 Cr <0.35 Zr and/or V < 0.35 in total Zn < 0.25 balance aluminium and unavoidable impurities, and wherein said brazing sheet has a post-braze 0.2% yield strength of at least 50 MPa and having a corrosion life of more than 12 days in a SWAAT test without perforations in accordance with ASTM G-85, and further to a method of its manufacture.