Aluminum brazing material for use in aluminum heat exchanger
AssigneesSumitomo Light Metal Industrial, Ltd., Sumitomo Precision Products Co., Ltd.
InventorsKeizo Nanba, Michiki Hagiwara, Shosuke Iwasaki, Tetsuo Abiko
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Abstract
Aluminum brazing alloys for assembling aluminum heat exchangers by brazing which consist essentially of 4.5 to 13.5% of Si, from 0.005% to less than 0.1% of Sr and the balance essentially Al and, further, optionally may contain at least one element selected from the group consisting of 0.3 to 3.0% of Mg, 2.3 t0 4.7% of Cu and 9.3 to 10.7% of Zn. The aluminum brazing alloys provide high strength brazed joints with highly refined microstructure and brazing operation can be performed in a good condition without causing any detrimental cavity. Such excellent properties make the brazing alloys especially suited for the fabrication of superhigh pressure heat exchangers.
Claims4
An aluminum brazing material used for assembling an aluminum heat exchanger by brazing, said aluminum brazing material consisting essentially of 4.5 to 10% of Si, from 0.03% to 0.07% of Sr, and the balance essentially aluminum.
An aluminum brazing material used for assembling an aluminum heat exchanger by brazing, said aluminum brazing material consisting essentially of 4.5 to 10% of Si, from 0.03% to 0.07% of Sr, at least one element selected from the group consisting of 0.3 to 3.0% of Mg, 2.3 to 4.7% of Cu and 9.3 to 10.7% of Zn, and the balance essentially aluminum.
An aluminum brazing material used for assembling an aluminum heat exchanger by brazing, said aluminum brazing material consisting essentially of 4.5 to 10% of Si, from 0.03% to 0.07% of Sr, from 9.3 to 10.7% of Zn and the balance essentially aluminum.
Dependencies are inferred from the claim text.