| 摘要 |
The invention relates to a brazing sheet with a two-layer structure or a thr ee- layer structure, having a core sheet made of an aluminium alloy core materia l 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, Z r and/or V < 0.35 in total, Zn < 0.25 balance aluminium and unavoidable impurities, an d 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 o f its manufacture. |
