Aluminum alloy composite for brazing and heat exchanger...

Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...

Reexamination Certificate

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C428S213000, C428S220000, C428S548000

Reexamination Certificate

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07387844

ABSTRACT:
An Al—Si based brazing material is formed on one surface of a core material, and a cladding material is formed on the other surface of the core material with a cladding ratio of 6 to 30% with respect to an entire thickness thereof. The core material contains 0.2 mass % or less of Mg, 0.3 mass % or less of Cr, 0.2 mass % or less of Fe, 0.2 to 1.0 mass % of Cu, 0.05 to 1.3 mass % of Si, 0.3 to 1.8 mass % of Mn, and 0.02 to 0.3 mass % of Ti in such a manner that a total content of Cu and Si is in the range of 2.0 mass % or less. The cladding material contains 2 to 9 mass % of Zn, 0.3 to 1.8 mass % of Mn and/or 0.04 to 1.2 mass % of Si, and further contains 0.02 to 0.25 mass % of Fe, 0.01 to 0.30 mass % of Cr, 0.005 to 0.15 mass % of Mg, and/or 0.001 to 0.15 mass % of Cu.

REFERENCES:
patent: 5260142 (1993-11-01), Kawabe et al.
patent: 5350436 (1994-09-01), Takezoe et al.
patent: 2002/0034653 (2002-03-01), Okamoto et al.
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patent: 2001-026850 (2001-01-01), None
patent: 2002-294377 (2002-10-01), None
patent: 2003-268470 (2003-09-01), None
patent: 2003-293060 (2003-10-01), None
patent: 2003-293064 (2003-10-01), None
“ASM Specialty Handbook”, Aluminum and Aluminum Alloys, Third Edition, 1996, Edited by J.R. Davis, pp. 20-22 and 41, 43 and 44. (no month).

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