US4095976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weldable alloy
Assignee: Haynes International Inc
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Filing: 1976-08-02
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Granted: 1978-06-20
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Expires: 1996-08-02
Abstract
Abstract An alloy containing 20-23% chromium, 17-20% iron, up to 2.5% cobalt, 7-10% molybdenum, up to 1% tungsten, up to 0.15% carbon, 0.2-1% silicon, up to 1% manganese and the balance nickel is greatly stabilized with respect to weld crack resistance by the addition of lanthanum in effective but small carefully controlled amounts to 0.08% in the presence of silicon as an essential minor ingredient.
Inventors
- 👤 Robert B. H. Herchenroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:56
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/055; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3033; B23K35/304
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
100 words
A weldable and oxidation resistant alloy consisting essentially by weight of: about 20 - 23% chromium about 17 - 20% iron up to 1% tungsten about 7 - 10% molybdenum about 0.05 - 0.15% carbon about 0.2 - 1% silicon up to 2.5% cobalt up to about 1% manganese about 0.05 to 0.5% aluminum an effective amount of lanthanum to provide weldability and high temperature oxidation resistance to about 0.08% and in a sufficiently concentrated form that the total amount of all other rare earth metals is less than the amount of lanthanum, and the balance nickel, and incidental impurities.
Claim 2
Dependent Claim
100 words
A weldable and oxidation resistant alloy consisting essentially by weight of: about 20 - 23% chromium about 17 - 20% iron up to 1% tungsten about 7 - 10% molybdenum about 0.05 - 0.15% carbon about 0.2 - 1% silicon up to 2.5% cobalt up to about 1% manganese about 0.05 to 0.5% aluminum an effective amount of lanthanum to provide weldability and high temperature oxidation resistance to about 0.08% and in a sufficiently concentrated form that the total amount of all other rare earth metals is less than the amount of lanthanum, and the balance nickel, and incidental impurities.
Claim 3
Dependent Claim
84 words
A weldable and oxidation resistant alloy with ranges in conformance with commercial melting capability consisting essentially in weight percent of about: chromium: 22 iron: 18.5 tungsten: 0.5 molybdenum: 9 carbon: 0.08 silicon: 0.5 cobalt: 1.5 manganese: 0.8 aluminum: about 0.05 to 0.5 lanthanum in effective amounts to provide weldability and high temperature oxidation resistance up to 0.08% and provided the total amount of rare earth elements other than lanthanum is minimized and maintained below the lanthanum content and the balance nickel and incidental impurities.
Claim 4
Dependent Claim
84 words
A weldable and oxidation resistant alloy with ranges in conformance with commercial melting capability consisting essentially in weight percent of about: chromium: 22 iron: 18.5 tungsten: 0.5 molybdenum: 9 carbon: 0.08 silicon: 0.5 cobalt: 1.5 manganese: 0.8 aluminum: about 0.05 to 0.5 lanthanum in effective amounts to provide weldability and high temperature oxidation resistance up to 0.08% and provided the total amount of rare earth elements other than lanthanum is minimized and maintained below the lanthanum content and the balance nickel and incidental impurities.
Claim 5
Dependent Claim
11 words
An alloy as claimed in claim 2 containing about 0.06% lanthanum.
Claim 6
Dependent Claim
19 words
An alloy as claimed in claim 2 containing about 0.03% lanthanum with ranges in conformance with commercial melting capability.
Claim 7
Dependent Claim
101 words
An oxidation resistant welded article made from an alloy consisting essentially of: about 20 - 23% chromium about 17 - 20% iron up to 1% tungsten about 7 - 10% molybdenum about 0.05 - 0.15% carbon about 0.2 - 1% silicon up to 2.5% cobalt up to about 1% manganese about 0.05 to 0.5% aluminum an effective amount of lanthanum to provide weldability and high temperature oxidation resistance to about 0.08% and in a sufficiently concentrated form that the total amount of all other rare earth metals is less than the amount of lanthanum and the balance nickel and incidental impurities.
Claim 8
Dependent Claim
101 words
An oxidation resistant welded article made from an alloy consisting essentially of: about 20 - 23% chromium about 17 - 20% iron up to 1% tungsten about 7 - 10% molybdenum about 0.05 - 0.15% carbon about 0.2 - 1% silicon up to 2.5% cobalt up to about 1% manganese about 0.05 to 0.5% aluminum an effective amount of lanthanum to provide weldability and high temperature oxidation resistance to about 0.08% and in a sufficiently concentrated form that the total amount of all other rare earth metals is less than the amount of lanthanum and the balance nickel and incidental impurities.
Claim 9
Dependent Claim
82 words
An oxidation resistant welded article made from an alloy with ranges in conformance with commercial melting capability consisting essentially of: chromium: 22 iron: 18.5 tungsten: 0.5 molybdenum: 9 carbon: 0.08 silicon: 0.5 cobalt: 1.5 manganese: 0.8 aluminum: 0.05 to 0.5 lanthanum in effective amounts to provide weldability and high temperature oxidation resistance up to 0.08% and provided the total amount of rare earth elements other than lanthanum is minimized and maintained below the lanthanum content and the balance nickel and incidental impurities.
Claim 10
Dependent Claim
82 words
An oxidation resistant welded article made from an alloy with ranges in conformance with commercial melting capability consisting essentially of: chromium: 22 iron: 18.5 tungsten: 0.5 molybdenum: 9 carbon: 0.08 silicon: 0.5 cobalt: 1.5 manganese: 0.8 aluminum: 0.05 to 0.5 lanthanum in effective amounts to provide weldability and high temperature oxidation resistance up to 0.08% and provided the total amount of rare earth elements other than lanthanum is minimized and maintained below the lanthanum content and the balance nickel and incidental impurities.
Claim 11
Dependent Claim
14 words
An oxidation resistant welded article as claimed in claim 8 containing about 0.03% lanthanum.
Claim 12
Dependent Claim
75 words
A weldable and oxidation resistant alloy with ranges in conformance with commercial melting capability consisting essentially in weight percent of about: chromium: about 22 iron: about 18.5 tungsten: about 0.5 molybdenum: about 9 carbon: about 0.08 silicon: about 0.5 cobalt: about 1.5 manganese: about 0.8 lanthanum: about 0.03 and provided the total amount of rare earth elements other than lanthanum is minimized and maintained below the lanthanum content and the balance nickel and incidental impurities.
Claim 13
Dependent Claim
75 words
A weldable and oxidation resistant alloy with ranges in conformance with commercial melting capability consisting essentially in weight percent of about: chromium: about 22 iron: about 18.5 tungsten: about 0.5 molybdenum: about 9 carbon: about 0.08 silicon: about 0.5 cobalt: about 1.5 manganese: about 0.8 lanthanum: about 0.03 and provided the total amount of rare earth elements other than lanthanum is minimized and maintained below the lanthanum content and the balance nickel and incidental impurities.
Claim 14
Dependent Claim
78 words
An oxidation resistant welded article made from an alloy consisting essentially of: about 20 - 23% chromium about 17 - 20% iron up to 1% tungsten about 7 - 10% molybdenum about 0.05 - 0.15% carbon about 0.2 - 1% silicon up to 2.5% cobalt up to about 1% manganese about 0.03% lanthanum and providing the total amount of all other rare earth metals is less than the amount of lanthanum and the balance nickel and incidental impurities.
Claim 15
Dependent Claim
78 words
An oxidation resistant welded article made from an alloy consisting essentially of: about 20 - 23% chromium about 17 - 20% iron up to 1% tungsten about 7 - 10% molybdenum about 0.05 - 0.15% carbon about 0.2 - 1% silicon up to 2.5% cobalt up to about 1% manganese about 0.03% lanthanum and providing the total amount of all other rare earth metals is less than the amount of lanthanum and the balance nickel and incidental impurities.
Claim 16
Dependent Claim
74 words
An oxidation resistant welded article made from an alloy with ranges in conformance with commercial melting capability consisting essentially of: chromium: about 22 iron: about 18.5% tungsten: about 0.5 molybdenum: about 9 carbon: about 0.08 silicon: about 0.5 cobalt: about 1.5 manganese: about 0.8 lanthanum: about 0.03 and provided the total amount of rare earth elements other than lanthanum is minimized and maintained below the lanthanum content and the balance nickel and incidental impurities.
Claim 17
Dependent Claim
74 words
An oxidation resistant welded article made from an alloy with ranges in conformance with commercial melting capability consisting essentially of: chromium: about 22 iron: about 18.5% tungsten: about 0.5 molybdenum: about 9 carbon: about 0.08 silicon: about 0.5 cobalt: about 1.5 manganese: about 0.8 lanthanum: about 0.03 and provided the total amount of rare earth elements other than lanthanum is minimized and maintained below the lanthanum content and the balance nickel and incidental impurities.
Claim 18
Dependent Claim
77 words
A weldable and oxidation resistant alloy consisting essentially by weight of: about 20 - 23% chromium about 17 - 20% iron up to 1% tungsten about 7 - 10% molybdenum about 0.05 - 0.15% carbon about 0.2 - 1% silicon up to 2.5% cobalt up to about 1% manganese about 0.03% lanthanum and provided the total amount of all other rare earth metals is less than the amount of lanthanum, and the balance nickel, and incidental impurities.
Claim 19
Dependent Claim
77 words
A weldable and oxidation resistant alloy consisting essentially by weight of: about 20 - 23% chromium about 17 - 20% iron up to 1% tungsten about 7 - 10% molybdenum about 0.05 - 0.15% carbon about 0.2 - 1% silicon up to 2.5% cobalt up to about 1% manganese about 0.03% lanthanum and provided the total amount of all other rare earth metals is less than the amount of lanthanum, and the balance nickel, and incidental impurities.
References Cited (Backward Citations)
US3304176A
Cited
US3383206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |