Claims
- 1. Sheet for welded constructions having an ultimate tensile strength R.sub.m >275 MPa, elongation A>22% and a product A.times.R.sub.m >7000, having the composition, consisting essentially of in % by weight:
- ______________________________________Mg: 4.2-4.7; Mn: 0.20-0.40; Zn: <0.20;Fe: 0.20-0.45; Si <0.25; Cr <0.15;Cu <0.25; Ti <0.10; Zr <0.10;______________________________________
- other elements <0.05 each and <0.20 in total,
- balance Al.
- 2. Sheet according to claim 1, having disperoids and eutectics in a proportion such that the volumetric fraction of dispersoids is less than 1.5 times the fraction of the eutectics.
- 3. Sheet according to claim 1, produced without final annealing.
- 4. Sheet according to claim 3, produced by hot-rolling with a rolling mill delivery temperature of between 300 and 370.degree. C.
- 5. Sheet according to claim 4, wherein the hot rolling mill delivery temperature is between 320 and 360.degree. C.
- 6. Sheet according to claim 4, having a width greater than 2200 mm.
- 7. Sheet according to claim 5, having a width greater than 2200 mm.
- 8. A stationary or movable tank comprising at least one sheet for welded construction having an ultimate tensile strength R.sub.m >275 MPa, elongation A>22% and a product A.times.R.sub.m >7000, said at least one sheet having the composition, consisting essentially of in % by weight:
- ______________________________________Mg: 4.2-4.7; Mn: 0.20-0.40; Zn: <0.20;Fe: 0.20-0.45; Si <0.25; Cr <0.15;Cu <0.25; Ti <0.10; Zr <0.10;______________________________________
- other elements <0.05 each and <0.20 in total,
- balance Al.
- 9. A tank according to claim 8, which is a road or railway tanker.
Priority Claims (1)
Number |
Date |
Country |
Kind |
95 12466 |
Oct 1995 |
FRX |
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Parent Case Info
This application is a continuation-in-part of U.S. application Ser. No. 08/729,838 filed Oct. 15, 1996, now abandon.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4043840 |
Sperry et al. |
Aug 1977 |
|
5523050 |
Lloyd et al. |
Jun 1996 |
|
Non-Patent Literature Citations (1)
Entry |
"Contribution to the Study of the Rate of Fatigue Cracking of the Aluminum Alloy 5083 at Low Temperature", R. Deschamps, Metaux Corrosion-Industrie, vol. 21, Jul.-Aug.1976, pp. 278-291 (with English language Abstract). |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
729838 |
Oct 1996 |
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