Formable, high strength aluminium-magnesium alloy material for application in welded structures

• US 20030145912A1
• Filed: 11/20/2002
• Published: 08/07/2003
• Est. Priority Date: 02/20/1998
• Status: Abandoned Application

• Current Assignee: Alfred Johann Peter Haszler, Desikan Sampath, Jean Pierre Jules Baekelandt, Job Anthonius Van Der Hoeven
• Original Assignee: Alfred Johann Peter Haszler, Desikan Sampath, Jean Pierre Jules Baekelandt, Job Anthonius Van Der Hoeven
• Inventors: Baekelandt, Jean Pierre Jules, Haszler, Alfred Johann Peter, Van Der Hoeven, Job Anthonius, Sampath, Desikan
• Application Number:
  US10/299,814
• Publication Number:
  US 20030145912A1
• Time in Patent Office: Days
• US Class Current: 148/417
• CPC Class Codes: B23K 35/288 with Sn or Zn
• CPC Class Codes: C22C 21/06 with magnesium as the next major constituent

Abstract

Aluminium-magnesium alloy in the form of a rolled product or an extrusion, having the following composition in weight percent:

Mg>3.0-4.5Mn  0.4-1.2Zn  0.4-1.7Zr  0.05-0.25Cr  0.3 max.Ti  0.2 max.V  0.2 max.Li  0.5 max.Sc  0.5 max.Fe  0.5 max.Si  0.5 max.Cu  0.15 max.Ag  0.4 max.others(each) max. 0.05(total) max. 0.15balance aluminium.

Claims

1. Aluminium-magnesium alloy in the form of a rolled product or an extrusion, having the following composition in weight percent.

2. Aluminium-magnesium alloy according to claim 1 having a temper selected from a soft temper, a work-hardened temper, a natural aged temper and an artificial aged temper.

3. Aluminium-magnesium alloy according to claim 1 or 2 wherein the Zn content is in the range 0.4 to 1.2 wt %.

4. Aluminium-magnesium alloy according to claim 3, wherein the Zn content is in the range of 0.4 to 0.9 wt %.

5. Aluminium-magnesium alloy according to any one of claims 1 to 4, wherein the Mg content is in the range 3.5 to 4.5 wt %.

6. Aluminium-magnesium alloy according to any one of claims 1 to 5, wherein the Cu content is in the range of 0.1 wt % max.

7. Aluminium-magnesium alloy according to any one of claims 1 to 6, wherein the Mn content is in the range of 0.4 to 0.75%.

8. Aluminium-magnesium alloy according to any one of claims 1 to 7, wherein the Fe/Mn ratio is in a range of 0.3 to 1.0.

9. Welded structure comprising at least one welded plate or extrusion made of aluminium-magnesium alloy according to any one of claims 1 to 8.

10. Welded structure according to claim 9 wherein the proof strength of the weld of said plate or extrusion is at least 110 MPa.

11. Joint structure comprising at least one plate or extrusion made of aluminium-magnesium alloy according to any one of claims 1 to 8.

12. Use of an aluminium-magnesium alloy according to any one of claims 1 to 11 at an operating temperature greater than 80°

C.

13. Use of an aluminium-magnesium alloy according to any one of claims 1 to 8 as a weld filler alloy.