Exfoliation resistant aluminium-magnesium alloy
Abstract
Aluminium-magnesium alloy product for welded mechanical construction, having the following composition, in weight percent:- Mg 3.5-6.0 Mn 0.4-1.2 Zn 0.4-1.5 Zr 0.25 max. Cr 0.3 max. Ti 0.2 max. Fe 0.5 max. Si 0.5 max. Cu 0.4 max. one or more selected from the group: Bi 0.005-0.1 Pb 0.005-0.1 Sn 0.01-0.1 Ag 0.01-0.5 Sc 0.01-0.5 Li 0.01-0.5 V 0.01-0.3 Ce 0.01-0.3 Y 0.01-0.3 Ni 0.01-0.3 others (each) 0.05 max. (total) 0.15 max. balance aluminum.
Claims
exact text as granted — not AI-modified1 . Aluminium-magnesium alloy product for welded mechanical construction, having the following composition, in weight percent:-
Mg
3.5-6.0
Mn
0.4-1.2
Zn
0.4-1.5
Zr
0.25 max.
Cr
0.3 max.
Ti
0.2 max.
Fe
0.5 max.
Si
0.5 max.
Cu
0.4 max.
one or more selected from the group:
Bi
0.005-0.1
Pb
0.005-0.1
Sn
0.01-0.1
Ag
0.01-0.5
Sc
0.01-0.5
Li
0.01-0.5
V
0.01-0.3
Ce
0.01-0.3
Y
0.01-0.3
Ni
0.01-0.3
others (each) 0.05 max.
(total) 0.15 max.
balance aluminium.
2 . Aluminium-magnesium alloy product according to claim 1 , wherein the Bi content is in the range of 0.01 to 0.1 wt. %, and preferably 0.01 to 0.05 wt. %.
3 . Aluminium-magnesium alloy product according to claim 1 or 2 , wherein the Li content is in the range of 0.1 to 0.3 wt. %.
4 . Aluminium-magnesium alloy product according to any one of claims 1 to 3 , wherein the Mg content is in the range of 4.0 to 5.6 wt. %
5 . Aluminium-magnesium alloy product according to claim 4 , wherein the Mg content is in the range of 4.6 to 5.6 wt. %.
6 . Aluminium-magnesium alloy product according to any one of claims 1 to 5 , wherein the Zn content is in the range of 0.4 to 0.9 wt. %.
7 . Aluminium-magnesium alloy product according to any one of claims 1 to 6 , wherein the Zr content is in the range of 0.05 to 0.25 wt. %.
8 . Aluminium-magnesium alloy product according to any one of claims 1 to 7 , wherein the product is provided in the form of a rolled product, an extruded product or a drawn product.
9 . Aluminium-magnesium alloy product according to any one of claims 1 to 8 having a temper selected from a soft temper and a work-hardened temper.
10 . Welded structure comprising at least one welded plate or extrusion made of aluminium-magnesium alloy product according to any one of claims 1 to 9 .
11 . Welded structure according to claim 10 , wherein the proof strength of the weld of said plate or extrusion is at least 140 MPa.
12 . Welded structure according to claim 10 , having an improved resistance to exfoliation resistance when sensitised for at least 10 days at 120° C.
13 . Welded structure according to claim 10 , having an exfoliation resistance of PA or better in an ASSET test in accordance with ASTM G66 and when sensitised in a soft temper for 20 days at 120° C.
14 . Welded structure according to claim 10 , having an exfoliation resistance of PA or better in an ASSET test in accordance with ASTM G66 and when sensitised in a work hardened temper for 16 days at 100° C.
15 . Welded structure according to any one of claims 10 to 14 , wherein the welded structure is a marine vessel.
16 . Welded structure according to any one of claims 10 to 14 , wherein the welded structure is a container for land transportation.
17 . Use of an aluminium-magnesium alloy product according to any one of claims 1 to 16 at an operating temperature greater than 80° C.Join the waitlist — get patent alerts
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