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(11) | EP 2 248 924 A8 |
(12) | CORRECTED EUROPEAN PATENT APPLICATION |
published in accordance with Art. 153(4) EPC |
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(54) | ALUMINUM ALLOY LAMINATE |
(57) Provided is a multi-layered sheet which has undergone heating corresponding to brazing,
such as an aluminum-alloy radiator tube, or a multi-layered sheet such as an aluminum-alloy
brazing sheet. The multi-layered sheet can have a reduced thickness and has excellent
fatigue properties. The multi-layered sheet of aluminum alloys comprises a core layer
(2) which has been clad at least with a sacrificial layer (3). This multi-layered
sheet is a multi-layered sheet to be subjected to brazing or welding to produce a
heat exchanger or is a multi-layered sheet which has undergone heating corresponding
to brazing. The core layer (2) comprises a specific 3000-series composition. In this
core layer (2), the average density in number of dispersed particles having a specific
size has been regulated. As a result, fatigue properties, which govern cracking, can
be highly improved.
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