Method for brazing strips of aluminium alloy
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United States of America Patent
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Apr 19, 2011
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app pub date -
Nov 24, 2004
filing date -
Nov 28, 2003
priority date (Note) -
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Abstract
The invention relates to an aluminum alloy strip or sheet with the following composition (% by weight): Si 0.3-1.0; Fe<1.0; Cu 0.3-1.0; Mn 0.3-2.0; Mg 0.3-3.0; Zn<6.0; Ti<0.1; Zr<0.3; Cr<0.3; Ni<2.0; Co<2.0; Bi<0.5; Y<0.5, other elements <0.05 each and 0.15 total, the remainder being aluminum, coated on at least one face with an aluminum brazing alloy containing 4 to 15% of silicon and 0.01 to 0.5% of at least one of the Ag, Be, Bi, Ce, La, Pb, Pd, Sb, Y elements or mischmetal. Sheets and strips according to the invention can be used particularly for fluxless brazing of heat exchangers.
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