EP 2553131 B1 20190508 - HIGH TEMPERATURE STABLE ALUMINIUM ALLOY
Title (en)
HIGH TEMPERATURE STABLE ALUMINIUM ALLOY
Title (de)
HOCHTEMPERATURSTABILE ALUMINIUMLEGIERUNG
Title (fr)
ALLIAGE D'ALUMINIUM STABLE À HAUTE TEMPÉRATURE
Publication
Application
Priority
- NO 20100474 A 20100330
- NO 2011000111 W 20110330
Abstract (en)
[origin: WO2011122958A1] The present invention relates to Al-Mg-Si-Cu alloy optimised for high temperature stability The alloy is characterized in that its content of Mg and Si lies within a polygon defined by the following coordinates of an Mg-Si diagram: a1 - a2 - a3 - a4 -a1 where in wt.% a1 = 0.60Mg,0.60Si, a2 = 0.90Mg, 0.90Si, a3 = 1.30 Mg, 0.60 Si and a4 = LOOMg, 0.30Si, and with the additional alloying elements: - Cu between 0.20 and 0.50 wt.% - Fe between 0.08 and 0.40 wt.%, and where at least one of the following elements are added for the purpose of grain structure control during processing of the alloy - Mn between 0 and 0.80 wt.% - Cr between 0 and 0.30 wt.% - Zr between 0 and 0.30 wt.%, and optionally Ti up to 0, 1 wt% and B up to 0,1 wt% as grain refining elements, and further optionally Ge between 0 and 0.20 wt.% and Ag between 0 and 0.20 wt.%, rest Al, including incidental impurities. In the alloy as defined above the L-phase is the dominant precipitate type as regards number density upon over-ageing.
IPC 8 full level
C22C 21/08 (2006.01)
CPC (source: EP)
C22C 21/08 (2013.01)
Citation (opposition)
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Opponent : TRIMET Aluminium SE,
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Designated contracting state (EPC)
AL 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 RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2011122958 A1 20111006; EP 2553131 A1 20130206; EP 2553131 A4 20170405; EP 2553131 B1 20190508
DOCDB simple family (application)
NO 2011000111 W 20110330; EP 11763104 A 20110330