US3663208A
Expired / Lapsed
US
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A chromium-nickel alloy steel containing copper
Assignee: Firth Brown Ltd
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Filing: 1969-06-19
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Granted: 1972-05-16
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Expires: 1989-06-19
Abstract
Abstract An alloy steel for high temperature applications, such as for compressor and turbine discs in gas turbines consists essentially of: 0.02-0.25 percent carbon, 0.05-1.5 percent silicon, 0.1-1.5 percent manganese, 7.0-12.0 percent chromium, 0.2-4.0 percent nickel, 0.2-5.0 percent molybdenum, 0.10-0.60 percent vanadium, 0.05-0.70 percent niobium, up to 7.0 percent cobalt, up to 5.0 percent copper, 0.002-0.03 percent boron, at least 0.010 percent but less than 0.050 percent nitrogen, the balance, apart from incidental impurities being iron.
Inventors
- 👤 Henry William Kirby
- 👤 Arthur Hogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:30
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/44; C22C38/54
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
71 words
An alloy consisting essentially of the following elements in the stated weight percentages: Carbon 0.10 - 0.20 Silicon 0.10 - 0.80 Manganese 0.50 - 1.0 Chromium 9.0 - 11.0 Nickel 1.5 - 3.5 Molybdenum 1.5 - 3.0 Vanadium 0.20 - 0.50 Niobium 0.10 - 0.40 Cobalt 2.0 - 3.5 Copper 0.25 to 2.0 Boron 0.005 - 0.020 Nitrogen at least 0.010 but less than 0.050 Iron and incidental impurities: the balance.
Claim 2
Dependent Claim
47 words
An alloy according to claim 1 consisting essentially of the following elements in the stated weight percentages: Carbon 0.05 Silicon 0.45 Manganese 0.80 Chromium 10.5 Nickel 0.5 Molybdenum 1.5 Vanadium 0.22 Niobium 0.45 Cobalt 4.0 Copper 2.0 Boron 0.010 Nitrogen 0.025 Iron and incidental impurities: the balance.
Claim 3
Dependent Claim
47 words
An alloy according to claim 1 consisting essentially of the fOllowing elements in the stated weight percentages: Carbon 0.07 Silicon 0.50 Manganese 0.80 Chromium 9.0 Nickel 0.4 Molybdenum 1.5 Vanadium 0.20 Niobium 0.60 Cobalt 4.0 Copper 1.35 Boron 0.10 Nitrogen 0.20 Iron and incidental impurities: the balance.
Claim 4
Dependent Claim
47 words
An alloy according to claim 1 consisting essentially of the following elements in the stated weight percentages: Carbon 0.06 Silicon 0.45 Manganese 0.85 Chromium 10.7 Nickel 0.4 Molybdenum 1.6 Vanadium 0.21 Niobium 0.46 Cobalt 4.2 Copper 1.8 Boron 0.010 Nitrogen 0.025 Iron and incidental impurities: the balance.
Claim 5
Dependent Claim
47 words
An alloy according to claim 1 consisting essentially of the following elements in the stated weight percentages: Carbon 0.07 Silicon 0.40 Manganese 0.90 Chromium 10.5 Nickel 0.5 Molybdenum 1.6 Vanadium 0.21 Niobium 0.46 Cobalt 4.2 Copper 2.9 Boron 0.012 Nitrogen 0.012 Iron and incidental impurities: the balance.
Claim 6
Dependent Claim
47 words
An alloy according to claim 1 consisting essentially of the following elements in the stated weight percentages: Carbon 0.04 Silicon 0.20 Manganese 0.75 Chromium 10.1 Nickel 0.3 Molybdenum 1.5 Vanadium 0.22 Niobium 0.48 Cobolt 4.2 Copper 2.0 Boron 0.009 Nitrogen 0.031 Iron and incidental impurities: the balance.
Claim 7
Dependent Claim
47 words
An alloy according to claim 2 consisting essentially of the following elements in the stated weight percentages: Carbon 0.15 Silicon 0.35 Manganese 0.70 Chromium 10.0 Nickel 2.5 Molybdenum 2.5 Vanadium 0.35 Niobium 0.25 Cobalt 3.0 Copper 0.25 Boron 0.010 Nitrogen 0.020 Iron and incidental impurities: the balance.
Claim 8
Dependent Claim
47 words
An alloy according to claim 2 consisting essentially of the following elements in the stated weight percentages: Carbon 0.16 Silicon 0.18 Manganese 0.63 Chromium 9.6 Nickel 2.4 Molybdenum 2.8 Vanadium 0.35 Niobium 0.15 Cobalt 2.9 Copper 0.40 Boron 0.009 Nitrogen 0.016 Iron and incidental impurities: the balance.
Claim 9
Dependent Claim
47 words
An alloy according to claim 2 consisting essentially of the following elements in the stated weight percentages: Carbon 0.11 Silicon 0.51 Manganese 0.72 Chromium 11.0 Nickel 2.3 Molybdenum 2.0 Vanadium 0.31 Niobium 0.11 Cobalt 2.9 Copper 0.30 Boron 0.006 Nitrogen 0.023 Iron and incidental impurities: the balance.
Claim 10
Dependent Claim
47 words
An alloy according to claim 2 consisting essentially of the following elements in the stated weight percentages: Carbon 0.16 Silicon 0.49 Manganese 0.66 Chromium 10.1 Nickel 2.3 Molybdenum 3.0 Vanadium 0.37 Niobium 0.20 Cobalt 3.0 Copper 0.25 Boron 0.005 Nitrogen 0.028 Iron and incidental impurities: the balance.
Claim 11
Dependent Claim
47 words
An alloy according to claim 2 consisting essentially of the following elements in the stated weight percentages: Carbon 0.18 Silicon 0.32 Manganese 0.87 Chromium 10.1 Nickel 2.4 Molybdenum 3.0 Vanadium 0.38 Niobium 0.23 Cobalt 3.1 Copper 0.25 Boron 0.006 Nitrogen 0.024 Iron and incidental impurities: the balance.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |