Brazing sheet comprising an Al--Mg--Si alloy brazing material
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United States of America Patent
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Aug 10, 1993
Grant Date -
N/A
app pub date -
Oct 31, 1991
filing date -
Mar 9, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A brazing sheet having an Al alloy core material one or each of whose surfaces is clad with a brazing material, the brazing sheet being excellent in vacuum brazing ability suitable for the manufacture of aluminum heat exchangers that have a hollow structure. The brazing material is an Al--Mg--Si alloy brazing material comprising 0.6 to 1.8 wt % of Mg, 6.0 to 20.0 wt % of Si, and the balance of Al and inevitable impurities, and having, in its metal texture, 1,000/mm.sup.2 or more Mg.sub.2 Si particles 2 to 5 .mu.m in diameter, with the particles being assumed to be spheres, and 3,000/mm.sup.2 or more Si particles 6 .mu.m or less in diameter, with the particles being assumed to be spheres.
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