| 摘要 |
<p>An aluminium alloy brazing sheet comprising: a core material made of an aluminium alloy consisting of ‰¤0.1 wt% Si, most preferably ‰¤ 0.06wt% Si, ‰¤ 0.35 wt% Mg, from 1.0 to 2.0 wt%, preferably 1.4 to 1.8 wt% Mn, from 0.2 to 1.0, preferably 0.6 to 1.0 wt% Cu, ‰¤0.7 wt% Fe, ‰¤0.3 wt% each of Zr, Ti, Ni, Hf, V, Cr, In, Sn and ‰¤0.5 wt% total of Zr, Ti, Ni, Hf, V, Cr, In, Sn, the remainder being Al and unavoidable impurities; and a waterside cladding material clad on at least one side of the core material, said cladding material being made of an aluminium alloy having a potential lower than that of said core material and consisting essentially of 0.5-1.5 wt% of Si, 1.0 to 2.0 wt% preferably 1.4-1.8 wt% of Mn, ‰¤0.15 wt% Mg, ‰¤ 0.1% Cu, ‰¤ 0.7 wt% Fe, ‰¤1.4 wt%, preferably ‰¤ 1.1 wt%, most preferably ‰¤0.4 wt% Zn, ‰¤0.3 wt% each of Zr, Ti, Ni, Hf, V, Cr, In, Sn and ‰¤0.5 wt% total of Zr, Ti, Ni, Hf, V, Cr, In, Sn; the remainder being Al and unavoidable impurities, wherein the ratio of wt% Si in the waterside clad to wt% Si in the core is at least 5:1, preferably at least 10:1.</p> |
