US3837846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Austenitic steel alloy adapted to be welded without cracking
Assignee: Vereinigte Deutsche Metallwerke AG
•
Filing: 1972-03-23
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Granted: 1974-09-24
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Expires: 1992-03-23
Abstract
Abstract An austenitic steel alloy capable of being welded without cracking by the argon arc-welding process, consists of substantially 16 to 35 percent by weight chromium, 15 to 45 percent by weight nickel, 0 to 5 percent by weight molybdenum, 0 to 3 percent by weight copper, 0.1 to 1.5 percent by weight aluminum, 0.01 to 0.10 percent by weight carbon, 0.30 to 0.60 percent by weight silicon, 0 to 0.008 percent by weight calcium, 0 to 0.05 percent by weight zirconium, and manganese, titanium, sulfur and phosphorus in weight-percent concentrations within the area to the left of curve I in the graph of FIG. 2 of the drawing, the balance being iron and the usual (inevitable) impurities.
Inventors
- 👤 H Becker
- 👤 G Kohlert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:13
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
36 words
The alloy defined in claim 1 wherein the manganese, titanium, sulfur and phosphorus weight-percent concentrations are substantially within the area to the left of the curve II in the graph of FIG. 2 of the drawing.
Claim 2
Dependent Claim
82 words
The alloy defined in claim 1 wherein the manganese, titanium, sulfur and phosphorus weight concentrations are defined by the relationship Alpha > or = A + (B X Beta ) where Alpha is the sum of the weight percentages of manganese and titanium, B is the sum of weight percentages of sulphur and phosphorous, A is -0.05 percent and B is 100 for Beta 0.0065 to 0.0145 percent, and A is -9.48 percent and B is 750 for Beta > 0.0145 percent.
Claim 3
Dependent Claim
13 words
The alloy defined in claim 1 which contains at least 0.01 percent zirconium.
Claim 4
Dependent Claim
16 words
The alloy defined in claim 4 having a zirconium content of about 0.02 percent by weight.
Claim 5
Dependent Claim
18 words
The alloy defined in claim 1 having a calcium content of substantially 0.004 to 0.006 percent by weight.
Claim 6
Dependent Claim
16 words
The alloy defined in claim 1 wherein the manganese content is approximately twice the silicon content.
Claim 7
Dependent Claim
119 words
An austenitic steel alloy adapted to be welded without cracking, consisting of essentially 16 to 35 percent by weight chromium, 15 to 45 percent by weight nickel, 0 to 5 percent by weight molybdenum, 0 to 3 percent by weight copper, 0.1 to 1.5 percent by weight aluminum, 0.01 to 0.1 percent by weight carbon, 0.30 to 0.60 percent by weight silicon, 0.004 to 0.006 percent by weight calcium, 0 to 0.05 percent by weight zirconium, and an effective amount of manganese, titanium, sulfur and phosphorous limited to the weight-percentage concentrations within the area to the left of the curve I in the graph of FIG. 2 of the drawing, the balance being iron and the usual inevitable impurities.
Claim 8
Dependent Claim
36 words
The alloy defined in claim 8 wherein the manganese, titanium, sulfur and phosphorous weight-percentage concentrations are substantially within the area to the left of the curve II in the graph of FIG. 2 of the drawing.
Claim 9
Dependent Claim
16 words
The alloy defined in claim 8 wherein the silicon content is about 0.50 percent by weight.
Claim 10
Dependent Claim
13 words
The alloy defined in claim 8 which contains at least 0.01 percent zirconium.
Claim 11
Dependent Claim
16 words
The alloy defined in claim 11 having a silicon content of about 0.02 percent by weight.
Claim 12
Dependent Claim
16 words
The alloy defined in claim 8 wherein the manganese content is approximately twice the silicon content.
Claim 13
Dependent Claim
119 words
An austenitic steel alloy adapted to be welded without cracking and consisting of essentially 16 to 35 percent by weight chromium, 15 to 45 percent by weight nickel, 0 to 5 percent by weight molybdenum, 0 to 3 percent by weight copper, 0.1 to 1.5 percent by weight aluminum, 0.01 to 0.1 percent by weight carbon, 0.3 to 0.6 percent by weight silicon, 0.001 to 0.008 percent by weight calcium, 0 to 0.05 percent by weight zirconium, and an effective amount of manganese, titanium, sulfur and phosphorous limited to the weight-percentage concentrations within the area to the left of curve I of the graph of FIG. 2 of the drawing, the balance being iron and the usual inevitable impurities.
References Cited (Backward Citations)
US2519406A
Cited
US3184577A
Cited
US3212884A
Cited
US3300347A
Cited
US3594158A
Cited
US3519419A
Cited
US3573034A
Cited
US3563729A
Cited
US3573899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |