US2004256036A1PendingUtilityA1
Aluminium-magnesium alloy product
Priority: Aug 13, 2001Filed: Jul 31, 2002Published: Dec 23, 2004
Est. expiryAug 13, 2021(expired)· nominal 20-yr term from priority
Inventors:Job Anthonius Van Der HoevenLinzhong ZhuangBruno SchepersPeter De SmetJean Pierre Jules Baekelandt
B62D 29/00C22C 21/06B62D 29/008
24
PatentIndex Score
0
Cited by
0
References
0
Claims
Abstract
Aluminium-magnesium alloy in the form of a rolled product or an extrusion, having the composition in weight percent:—Mg 4.5-5.6 Mn 0.05-0.4 Zn 0.40-0.8 Cu 0.06-0.35 Cr 0.25 max. Fe 0.35 max. Si 0.25 max. Zr 0.12 max. Ti 0.3 max. others (each) max. 0.05, (total) max. 0.15 balance aluminium.
Claims
exact text as granted — not AI-modified1 . Aluminium-magnesium alloy in the form of a rolled product or an extrusion, having the composition in weight percent:
Mg 4.5-5.6 Mn 0.05-0.4 Zn 0.40-0.8 Cu 0.06-0.35 Cr 0.25 max. Fe 0.35 max. Si 0.25 max. Zr 0.12 max. Ti 0.3 max., impurities (each) max. 0.05, (total) max. 0.15 balance aluminium.
2 . Product according to claim 1 , wherein the amount of Zr does not exceed 0.05 wt. %.
3 . Product according to claim 1 , wherein the amount of Zr does not exceed 0.02 wt. %.
4 . Product according to any one of claim 1 , wherein the amount of Cu is more than 0.075 wt. %.
5 . Product according to any one of claim 1 , wherein the amount of Cu is more than 0.10 wt. %.
6 . Product according to claim 1 , wherein the amount of Cu does not exceed 0.24 wt. %.
7 . Product according to claim 1 , wherein the amount of Cu does not exceed 0.18 wt. %.
8 . Product according to claim 1 , wherein the amount of Cu does not exceed 0.15 wt. %.
9 . Product according to claim 1 , wherein the amount of Mg does not exceed 4.8 wt. %.
10 . Product according to claim 1 , wherein the amount of Mn is in the range of 0.1 to 0.2 wt. %.
11 . Product according to claim 1 , wherein the amount of Zn is in the range of 0.4 to 0.75 wt. %.
12 . Product according to claim 1 , wherein the amount of Zn is in the range of 0.4 to 0.6 wt. %.
13 . Product according to claim 1 , wherein the amount of Cr is in the range of 0.06 to 0.2 wt. %.
14 . Product according to claim 1 , wherein the amount of Cr is in the range of 0.11 to 0.2 wt. %.
15 . Product according to claim 1 , wherein the amount of Si is max. 0.2 wt. %.
16 . Product according to claim 1 , wherein the amount of Si is max. 0.12 wt. %.
17 . Product according to claim 1 , wherein the amount of Si is max. 0.10 wt. %.
18 . Product according to claim 1 , wherein the amount of Fe is max. 0.2 wt. %.
19 . Product according to claim 1 , wherein the amount of Ti is max. 0.15 wt. %.
20 . Product according to claim 1 , wherein the product is provided in an O-temper condition.
21 . Product according to claim 1 , wherein the product is provided in an H-temper condition.
22 . Product according to claim 1 , wherein the product is a rolled product having a gauge up to 200 mm.
23 . Product according to claim 1 , wherein the product is a rolled product having a gauge in the range of 0.5 to 5 mm.
24 . Product according to claim 1 , wherein the product has a weight loss after sensitising for 100 hours at 100° C. less than 25 Mg/cm 2 when tested against intergranular corrosion in accordance with ASTM G67.
25 . Product according to claim 1 , wherein the product has a weight loss after sensitising for 100 hours at 100° C. less than 15 Mg/cm when tested against intergranular corrosion in accordance with ASTM G67.
26 . Product according to claim 1 , wherein the product has an elongation A50 of at least 24%.
27 . Aluminium-magnesium alloy in the form of a rolled product or an extrusion, having the composition consisting of, in weight percent:
Mg
4.5-5.6
Mn
0.05-0.4
Zn
0.40-0.8
Cu
0.06-0.35
Cr
0.25 max.
Fe
0.35 max.
Si
0.25 max.
Zr
0.12 max.
Ti
0.3 max.,
impurities (each) max. 0.05, (total) max. 0.15 balance aluminium.
28 . Welded structure, comprising at least one section of the product according to claim 1 .
29 . Welded pressure vessel comprising a shell that comprises the wrought aluminium-magnesium alloy product according to claim 1 .
30 . Method of producing an aluminium alloy rolled product comprising the steps of:
(i) providing an intermediate alloy product having a composition according to the composition according to claim 1; (ii) cold working the intermediate alloy product to a final gauge to obtain an intermediate wrought product; (iii) annealing the intermediate wrought product by heating the product at a heating rate in the range of 2 to 200° C./sec, holding the product at a soaking temperature in the range of 480 to 570° C. for a duration of up to 100 sec, followed by a cooling at a cooling rate in the range of 10 to 500° C./sec to a temperature below 150° C.
31 . Method according to claim 30 , wherein the product is held at the soaking temperature in the range of 480 to 570° C. for a duration of up to 40 sec.
32 . Method according to claim 30 , wherein the soaking temperature during step (iii) is in the range of 520 to 550° C.
33 . Method according to claim 30 , wherein the heating rate during processing step (iii) is at least 50° C./sec.
34 . Method according to claim 30 , wherein the heating rate during processing step (iii) is at least 80° C./sec.
35 . Method according to claim 30 , wherein the final gauge of the aluminium sheet is in a range of 0.5 to 5 mm.
36 . Method according to claim 30 , wherein processing step (iii) is carried out in a continuous annealing facility.Join the waitlist — get patent alerts
Track US2004256036A1 — get alerts on status changes and closely related new filings.
We store only your email — no account needed. See our privacy policy.