Aluminum alloy brazing sheet for heat exchanger
US8227091B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 18, 2007 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | Jan 29, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.