US3767388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding rod for the welding of chromium stainless steel
Assignee: Hitachi Ltd
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Filing: 1971-09-03
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Granted: 1973-10-23
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Expires: 1991-09-03
Abstract
Abstract A welding rod for the welding of chromium stainless steel comprising not more than 0.07 percent by weight of C, not more than 1.0 percent by weight of Si, not more than 1.0 percent by weight of Mn and 11 - 13.5 percent by weight of Cr as essential components, said welding rod consisting of 0.02 - 0.06 percent by weight of C, 0.1 - 1 percent by weight of Si, 0.1 percent by weight of Mn, 11 - 13.5 percent by weight of Cr, 3.0 - 3.95 percent by weight of Ni, 0.3 - 0.6 percent by weight of Mo, 0.005 - 0.1 percent by weight of Al, 0.005 - 0.1 percent by weight of Ti and the remainder of Fe and impurities.
Inventors
- 👤 S Asakura
- 👤 K Watanabe
- 👤 H Wachi
- 👤 T Nemoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:12
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/50; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3053; B23K35/308; B23K35/3086
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
17 words
A welding rod as defined in claim 1, which has a diameter of 4.0 mm or larger.
Claim 2
Dependent Claim
37 words
A welding rod as defined in claim 1, which in the arc welding of said chromium stainless steel enables the pre-heating temperature of the chromium stainless steel to be welded to be in the range of 50*-150*C.
Claim 3
Dependent Claim
65 words
A welding rod as defined in claim 1, which in the arc welding of said chromium stainless steel enables a satisfactory arc welding to be achieved when the preheating temperature and the interpass temperature of the chromium stainless steel to be welded are 50*-150*C. and after welding of the welded chromium stainless steel is cooled to 50*-150*C. and subjected to a post-heat treatment at 580*-650*C.
Claim 4
Dependent Claim
72 words
A welding rod as defined in claim 1, which is used for the arc welding of chromium stainless steel comprising not more than 0.07 percent by weight of C, not more than 1.0 percent by weight of Si, not more than 1.0 percent by weight of Mn, 11 - 13.5 percent by weight of Cr, 3.0 - 3.95 percent by weight of Ni and 0.3 - 0.6 percent by weight of Mo.
Claim 5
Dependent Claim
159 words
A welding rod for use in the arc welding of chromium stainless steel comprising not more than 0.07 percent by weight of C, not more than 1.0 percent by weight of Si, not more than 1.0 percent by weight of Mn, 11 - 13.5 percent by weight of Cr, 3.0 - 3.95 percent by weight of Ni and 0.3 - 0.6 percent by weight of Mo as the essential components, said welding rod consisting of 0.02 - 0.06 percent by weight of C, 0.1 - 1 percent by weight of Si, 0.1 - 1 percent by weight of Mn, 11 - 13.5 percent by weight of Cr, 3.0 - 3.95 percent by weight of Ni, 0.3 - 0.6 percent by weight of Mo, 0.01 - 0.05 percent by weight of Al, 0.04 - 0.06 percent by weight of Ti and the remainder of Fe and impurities, the sum of Al and Ti being 0.02 - 0.08 percent by weight.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |