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1. CA2251337 - ALUMINIUM ALLOY AND EXTRUSION

Office Canada
Application Number 2251337
Application Date 15.04.1997
Publication Number 2251337
Publication Date 23.10.1997
Grant Number
Grant Date 26.06.2007
Publication Kind C
IPC
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
21
Alloys based on aluminium
02
with silicon as the next major constituent
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
21
Alloys based on aluminium
06
with magnesium as the next major constituent
08
with silicon
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
F
CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS
1
Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
04
of aluminium or alloys based thereon
05
of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
C22C 21/02
C22C 21/08
C22F 1/05
CPC
C22C 21/08
C22F 1/05
Applicants ALCAN INTERNATIONAL LIMITED
Inventors PARSON, NICHOLAS CHARLES
ELLARD, BARRY ROY
MARSHALL, GRAEME JOHN
Priority Data 9607781.3 15.04.1996 GB
Title
(EN) ALUMINIUM ALLOY AND EXTRUSION
(FR) ALLIAGE A BASE D'ALUMINIUM ET EXTRUSION D'ALUMINIUM
Abstract
(EN)
A population of extrusion billets has a specification such that every billet is of an alloy of composition (in wt.%): Fe <0.35; Si 0.20-0.6; Mn <0.10; Mg 0.25-0.9; Cu <0.015; Ti <0.10; Cr <0.10; Zn <0.03; balance Al of commercial purity. After ageing to T5 or T6 temper, extruded sections can be etched and anodised to give extruded matt anodised sections having improved properties.

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