ALUMINUM ALLOY BRAZING SHEET FOR HEAT EXCHANGER
First Claim
1. An aluminum alloy brazing sheet for heat exchangers comprising a core material, a sacrificial anode material formed in one face side of the core material, and a brazing filler metal made of an Al—
- Si based alloy formed in the other face side of the core material, wherein the sacrificial anode material contains Fe;
0.03 to 0.30% by mass, Mn;
0.01 to 0.40% by mass, Si;
0.4 to 1.4% by mass, Zn 2.0 to 5.5% by mass, Mg;
0.05% by mass or less, and the balance comprises Al and inevitable impurities and satisfies that the crystal grain size after a heat treatment of 600°
C.×
5 minutes is 100 to 400 μ
m.
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Accused Products
Abstract
Disclosed is an aluminum alloy brazing sheet for heat exchangers, which has high strength after brazing, high corrosion resistance and excellent brazability. Specifically disclosed is an aluminum alloy brazing sheet (1a) for heat exchangers comprising a core member (2), a sacrificial member (3) formed on one side of the core member (2), and a brazing filler metal (4) formed on the other side of the core member (2) and composed of an Al—Si alloy. The sacrificial member (3) contains 0.03-0.30% by mass of Fe, 0.01-0.40% by mass of Mn, 0.4-1.4% by mass of Si, 2.0-5.5% by mass of Zn, not more than 0.05% by mass of Mg and the balance of Al and unavoidable impurities. In addition, the sacrificial member (3) has a crystal grain size of 100-400 & mgr;m after 5-minute heat treatment at 600 & ring;C during the brazing.
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Citations
1 Claim
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1. An aluminum alloy brazing sheet for heat exchangers comprising a core material, a sacrificial anode material formed in one face side of the core material, and a brazing filler metal made of an Al—
- Si based alloy formed in the other face side of the core material, wherein the sacrificial anode material contains Fe;
0.03 to 0.30% by mass, Mn;
0.01 to 0.40% by mass, Si;
0.4 to 1.4% by mass, Zn 2.0 to 5.5% by mass, Mg;
0.05% by mass or less, and the balance comprises Al and inevitable impurities and satisfies that the crystal grain size after a heat treatment of 600°
C.×
5 minutes is 100 to 400 μ
m.
- Si based alloy formed in the other face side of the core material, wherein the sacrificial anode material contains Fe;
Specification