Aluminum alloy fin material and heat exchanger
AssigneeMitsubishi Aluminum Co., Ltd.
InventorsMichihide Yoshino, Masakazu Edo
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Abstract
[Problem] There is provided an aluminum alloy fin material with high strength, superior brazability and superior corrosion resistance. [Solving means] An aluminum alloy fin material has a composition, in % by mass, of the following: Zr: 0.05 to 0.25%, Mn: 1.3 to 1.8%, Si: 0.7 to 1.3%, Fe: 0.10 to 0.35%, and Zn: 1.2 to 3.0%, the remainder being Al and inevitable impurities. The aluminum alloy fin material has a solidus temperature of 615° C. or higher, a tensile strength after brazing of 135 MPa or higher, a pitting potential after brazing in the range of −900 to −780 mV, and an average crystal grain diameter in a rolled surface after brazing in the range of 200 μm to 1,000 μm.
Claims9
An aluminum alloy fin material, wherein the aluminum alloy fin material has a composition, in % by mass, of the following:
- Zr:
- 0.05 to 0.25%, Mn:
- 1.3 to 1.8%, Si:
- 0.7 to 1.3%, Fe:
- 0.10 to 0.35%, and Zn:
- 1.2 to 3.0%, the remainder being Al and inevitable impurities, and wherein the aluminum alloy fin material has a solidus temperature of 615° C. or higher, a tensile strength after brazing of 135 MPa or higher, a pitting potential after brazing in the range of −900 to −780 mV, and an average crystal grain diameter in a rolled surface after brazing in the range of 200 μm to 1,000 μm.
Dependencies are inferred from the claim text.