Claims
- 1. In the method of vacuum brazing, the improvement which comprises using as brazing alloy an aluminum alloy brazing composition consisting of an aluminum alloy core and a cladding applied to at least one side of the aluminum alloy core, wherein the aluminum alloy core consists essentially of manganese from about 0.8 to about 1.5%, silicon from about 0.45 to about 0.75%, titanium from about 0.03 to about 0.1%, a combined magnesium, copper and zinc content not in excess of about 0.15%, an iron content not in excess of about 0.3%, the total quantity of other impurities not exceeding about 0.15%, balance aluminum; and wherein the cladding consists of an AA 4XXX series aluminum alloy.
- 2. The method of claim 1 wherein the combined magnesium, copper and zinc content of the core alloy is not in excess of about 0.10%.
- 3. The method of claim 1 wherein the titanium content of the core alloy is within the range from about 0.03 to about 0.07%.
- 4. The method of claim 1 wherein the cladding is selected from AA 4047, 4147 and 4104 alloys.
- 5. The method of claim 1 wherein the brazing composite is in sheet form and the core alloy is clad on both sides with the cladding alloy.
- 6. The method of claim 1 wherein the aluminum alloy brazing composite is used in the brazing of evaporators.
Parent Case Info
This is a divisional of application Ser. No. 08/118,272, filed on Sep. 9, 1993, now U.S. Pat. No. 5,356,725.
US Referenced Citations (13)
Divisions (1)
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Number |
Date |
Country |
Parent |
118272 |
Sep 1993 |
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