Title:
BRAZING SHEET MADE OF ALUMINUM ALLOY FOR HEAT EXCHANGER
Document Type and Number:
Japanese Patent JP3533434
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve the brazability and formability of a brazing sheet bar made of aluminum for resistance welding, used for a tube material for heat exchanger for automobile, etc., after being subjected to resistance welding.
SOLUTION: An aluminum alloy, having a composition consisting of, by weight, 0.05-0.8% Si, 0.05-0.6% Fe, 0.3-1.1% Cu, 0.6-1.6% Mn, further ≤0.3% each of one or ≥2 elements among Cr, Zr, and Ti, and the balance Al with inevitable impurities, is used as a core material, and one side or both sides of this core material are clad with Al-Si alloy as brazing filler metal. In the resultant brazing sheet made of aluminum alloy constituted as mentioned above, the ratio between the rolling-directional average length (a) of the crystalline grains, before brazing heating, of the core material and the sheet-thickness- directional average length (b), a/b, is regulated to 7.5-3.0.
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Inventors:
Yamada, Tomohiro
Dokou, Takenobu
Dokou, Takenobu
Application Number:
JP21133296A
Publication Date:
May 31, 2004
Filing Date:
August 09, 1996
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD:THE
International Classes:
F28F21/08; B23K1/00; B23K35/22; B23K35/40; C22C21/00; (IPC1-7): C22C21/00; B23K35/22; F28F21/08
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