Patent US4158606A successfully refreshed from Google Patents.
US4158606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Austenitic stainless steel alloys having improved resistance to fast neutron-induced swelling
Assignee: United States Department of Energy
•
Filing: 1978-03-15
•
Granted: 1979-06-19
•
Expires: 1998-03-15
Abstract
Abstract The present invention is based on the discovery that radiation-induced voids which occur during fast neutron irradiation can be controlled by small but effective additions of titanium and silicon. The void-suppressing effect of these metals in combination is demonstrated and particularly apparent in austenitic stainless steels.
Inventors
- 👤 Everett E. Bloom
- 👤 James O. Stiegler
- 👤 Arthur F. Rowcliffe
- 👤 James M. Leitnaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:25
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/44; C22C38/50
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
55 words
In a nuclear reactor having a structural component made of austenitic stainless exposed to fast neutron flux swelling conditions, the improvement wherein said austenitic stainless steel consists essentially of Fe, Cr and Ni and prescribed within the area ABCD in the ternary diagram of FIG. 3, and a void depressing concentration of Si and Ti.
Claim 2
Dependent Claim
55 words
In a nuclear reactor having a structural component made of austenitic stainless exposed to fast neutron flux swelling conditions, the improvement wherein said austenitic stainless steel consists essentially of Fe, Cr and Ni and prescribed within the area ABCD in the ternary diagram of FIG. 3, and a void depressing concentration of Si and Ti.
Claim 3
Dependent Claim
35 words
The component of claim 1 in which said austenitic stainless steel consists essentially of in weight percent 8.7-16.3 Cr, 13.4-19.4 Ni, 1.9-2.3 Mo, a void depressing concentration of Si and Ti and the balance Fe.
Claim 4
Dependent Claim
32 words
The component of claim 1 or 2 in which the silicon concentration is in the range of 0.7-2 percent and the titanium concentration is in the range of 0.1 to 0.5 percent.
Claim 5
Dependent Claim
41 words
The component of claim 1 in which said austenitic stainless steel consists essentially of in weight percent 18-20 Cr, 8-11 Ni, up to 0.08 C, up to 2 Mn, a void depressing concentration of Si and Ti and the balance Fe.
Claim 6
Dependent Claim
39 words
The component of claim 1 in which said austenitic stainless steel consists essentially of in weight percent 16-18 Cr, 10-14 Ni, 2-3 Mo, 0.04-0.06 C, 1.5-2 Mn, a void depressing concentration of Si and Ti and the balance Fe.
Claim 7
Dependent Claim
43 words
The component of claim 1 in which said austenitic stainless steel consists essentially of in weight percent 17-19 Cr, 8-11 Ni, up to 2 Mn, up to 0.08 C, a void depressing concentration of Si and Ti, minimum Ti=5×C and the balance Fe.
Claim 8
Dependent Claim
37 words
The component of claim 1 in which said austenitic stainless steel consists essentially of in weight percent 14.8 Cr, 15 Ni, 1.96 Mn, 1.1 Mo, a void depressing concentration of Si and Ti and the balance Fe.
Claim 9
Dependent Claim
19 words
The component of claim 5 in which said austenitic stainless steel contains 0.2-0.46% Ti and 0.70-2% Si by weight.
References Cited (Backward Citations)
CA550108A
Cited
CA883741A
Cited
US3440037A
Cited
CA937427A
Cited
US3764302A
Cited
US3751244A
Cited
US3969161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-18 | 1982-12-18 | 1983-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-18 | 1986-12-18 | 1987-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-18 | 1990-12-18 | 1991-06-19 | $7700.00 | Window Closed / Lapsed |