| (19) |
 |
|
(11) |
EP 1 433 866 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
07.07.2004 Bulletin 2004/28 |
| (43) |
Date of publication A2: |
|
30.06.2004 Bulletin 2004/27 |
| (22) |
Date of filing: 23.12.2003 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
Designated Extension States: |
|
AL LT LV MK |
| (30) |
Priority: |
23.12.2002 US 436123 P
|
| (71) |
Applicant: Alcoa Inc. |
|
Pittsburgh, PA 15212-5858 (US) |
|
| (72) |
Inventors: |
|
- Butler jr.John
Lititz PA 17543 (US)
- YEH Jieh-Ren
Pittsburgh PA 15220 (US)
- Brichet Claude E
CH 4125 Riehen (CH)
- SAENZ DE MIERA Vincente Martin
Jaca 22700 Huesca (ES)
|
| (74) |
Representative: Carstairs, J. C. |
|
Forrester & Boehmert, Pettenkoferstrasse 20-22
80336 München
80336 München (DE) |
|
| |
|
| (54) |
Crash resistant aluminium alloy sheet products and method of making same |
(57) Aluminum sheet products having high strengths and favorable crashworthiness are disclosed.
The aluminum alloys include Si, Mg and Mn in controlled amounts which provide high
yield strengths while retaining formability and crash resistant properties. The sheet
products undergo heat treatment and slow quenching. The sheet products are particularly
suitable for use as auto body sheet products.