Patent US4029934A successfully refreshed from Google Patents.
US4029934A
Expired / Lapsed
US
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Welding, and a steel suitable for use therein
Assignee: British Steel PLC
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Filing: 1976-09-03
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Granted: 1977-06-14
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Expires: 1996-09-03
Abstract
Abstract A steel which contains up to 0.15% carbon, 0.5 to 1.5% manganese, 0.03 to 0.10% silicon, 0.2 to 0.6% molybdenum, up to 0.05% aluminium, 0.03 to 0.05% titanium and 0.002 to 0.008% boron is particularly suitable as a welding consumable, for example as an electrode for the submerged arc welding of high strength micro-alloyed structural steels. Especially when used with a basic flux, welds can be produced showing excellent notch toughness characteristics which can even be improved by post-weld thermal treatments such as stress relieving and normalizing.
Inventors
- 👤 Allan Clark
- 👤 Philip Robert Kirkwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:30
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3053; C; C22; C22C; C22C38/00; C22C38/002; C22C38/12; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12222; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2951
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
45 words
A consumable welding wire for a source of filler metal for a weldment, said wire consisting essentially of: Carbon 0.15% max Manganese 0.5-1.5% Silicon 0.03-0.10% Molybdenum 0.2-0.6% Aluminum 0.02% max Titanium 0.03-0.05% Boron 0.002-0.008% Sulphur 0.04% max Phosphorus 0.04% max Iron and incidental impurities Balance.
Claim 2
Dependent Claim
45 words
A consumable welding wire for a source of filler metal for a weldment, said wire consisting essentially of: Carbon 0.15% max Manganese 0.5-1.5% Silicon 0.03-0.10% Molybdenum 0.2-0.6% Aluminum 0.02% max Titanium 0.03-0.05% Boron 0.002-0.008% Sulphur 0.04% max Phosphorus 0.04% max Iron and incidental impurities Balance.
Claim 3
Dependent Claim
16 words
The welding wire of claim 1 in which the carbon content is not more than 0.10%.
Claim 4
Dependent Claim
15 words
The welding wire of claim 1 in which the molybdenum content is at least 0.3%.
Claim 5
Dependent Claim
19 words
The welding wire of claim 1 in which the sulphur and phosphorus contents are each not more than 0.03%.
Claim 6
Dependent Claim
21 words
A source of filler metal for a weldment, comprising the consumable wire of claim 1 in combination with a basic flux.
Claim 7
Dependent Claim
22 words
The wire of claim 1, further including a thin coating of copper comprising up to about .15% by weight of said wire.
Claim 8
Dependent Claim
23 words
In a process for submerged arc welding, the improvement comprising melting a wire having the composition of claim 1 under a basic flux.
Claim 9
Dependent Claim
30 words
The method of claim 7, comprising the step of subjecting the weldment to a thermal treatment selected from stress relieving and normalizing to improve the notch toughness of said weldment.
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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) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |