(19)
(11) EP 2 248 924 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
30.03.2011 Bulletin 2011/13

(43) Date of publication:
10.11.2010 Bulletin 2010/45

(21) Application number: 09709940.2

(22) Date of filing: 05.02.2009
(51) International Patent Classification (IPC): 
C22C 21/00(2006.01)
C22F 1/00(2006.01)
C22F 1/04(2006.01)
F28F 19/06(2006.01)
(86) International application number:
PCT/JP2009/051998
(87) International publication number:
WO 2009/101896 (20.08.2009 Gazette 2009/34)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

(30) Priority: 12.02.2008 JP 2008030679
12.02.2008 JP 2008030680
25.11.2008 JP 2008299562

(71) Applicant: Kabushiki Kaisha Kobe Seiko Sho
Kobe-shi, Hyogo 651-8585 (JP)

(72) Inventors:
  • MATSUMOTO, Katsushi
    Hyogo 651-2271 (JP)
  • TAMURA, Eiichi
    Hyogo 651-2271 (JP)
  • KINEFUCHI, Masao
    Hyogo 651-2271 (JP)
  • UEDA, Toshiki
    Tochigi 321-4367 (JP)
  • KOSHIGOE, Fumihiro
    Tochigi 321-4367 (JP)
  • KIMURA, Shimpei
    Tochigi 321-4367 (JP)

(74) Representative: Müller-Boré & Partner Patentanwälte 
Grafinger Straße 2
81671 München
81671 München (DE)

   


(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.