US4494988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Galling and wear resistant steel alloy
Assignee: Armco Inc
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Filing: 1983-12-19
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Granted: 1985-01-22
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Expires: 2003-12-19
Abstract
Abstract A chromium-nickel-silicon-manganese steel alloy consisting essentially of about 1.0% maximum carbon, from 10% to about 16% manganese, about 0.07% maximum phosphorus, about 0.1% maximum sulfur, 4% to 6% silicon, 4% to 6% chromium, 4% to about 6% nickel, about 0.05% maximum nitrogen, and balance essentially iron. Preferred embodiments exhibit excellent galling resistance, metal-to-metal wear resistance, high impact strength, oxidation resistance and corrosion resistance.
Inventors
- 👤 William J. Schumacher
- 👤 Harry Tanczyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:36
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/58
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
62 words
A steel alloy having high tensile strength, metal-to-metal wear resistance, and oxidation resistance, said alloy consisting essentially of, in weight percent, about 1.0% maximum carbon, from 10% to about 16% manganese, about 0.07% maximum phosphorus, about 0.1% maximum sulfur, 4% to about 6% silicon, 4% to about 6% chromium, 4% to about 6% nickel, about 0.05% maximum nitrogen, and balance essentially iron.
Claim 2
Dependent Claim
62 words
A steel alloy having high tensile strength, metal-to-metal wear resistance, and oxidation resistance, said alloy consisting essentially of, in weight percent, about 1.0% maximum carbon, from 10% to about 16% manganese, about 0.07% maximum phosphorus, about 0.1% maximum sulfur, 4% to about 6% silicon, 4% to about 6% chromium, 4% to about 6% nickel, about 0.05% maximum nitrogen, and balance essentially iron.
Claim 3
Dependent Claim
62 words
The alloy claimed in claim 1 having superior galling resistance, good corrosion resistance and cryogenic impact strength, and being substantially fully austenitic in the hot worked condition, consisting essentially of 0.05% maximum carbon, from 11% to about 14% manganese, 4% to about 6% silicon, 4% to about 6% chromium, 4.5% to about 6% nickel, about 0.05% maximum nitrogen, and balance essentially iron.
Claim 4
Dependent Claim
43 words
The alloy claimed in claim 2, consisting essentially of 0.04% maximum carbon, from 12% to about 13.5% manganese, about 4.5% to about 5.2% silicon, about 4.7% to about 5.3% chromium, about 5% to about 5.5% nickel, 0.05% maximum nitrogen, and balance essentially iron.
Claim 5
Dependent Claim
49 words
The alloy claimed in claim 1 having superior metal-to-metal wear resistance, consisting essentially of about 0.9% maximum carbon, 10% to about 13% manganese, about 4.5% to about 5.5 silicon, about 5% to about 6% chromium, about 4.5% to about 5.5% nickel, about 0.05% maximum nitrogen, and balance essentially iron.
Claim 6
Dependent Claim
12 words
The alloy claimed in claim 4, wherein carbon is at least 0.1%.
Claim 7
Dependent Claim
19 words
The alloy claimed in claim 1, wherein up to 3% molybdenum is substituted for chromium on a 1:1 basis.
Claim 8
Dependent Claim
19 words
The alloy claimed in claim 1, wherein up to 3% aluminum is substituted for chromium on a 1:1 basis.
Claim 9
Dependent Claim
19 words
The alloy claimed in claim 1, wherein up to 4% copper is substituted for nickel on a 2:1 basis.
Claim 10
Dependent Claim
63 words
A cast steel alloy having high tensile strength, metal-to-metal wear resistance, and oxidation resistance, said alloy consisting essentially of, in weight percent, about 1.0% maximum carbon, from 10% to about 16% manganese, about 0.07% maximum phosphorus, about 0.1% maximum sulfur, 4% to about 6% silicon, 4% to about 6% chromium, 4% to about 6% nickel, about 0.05% maximum nitrogen, and balance essentially iron.
Claim 11
Dependent Claim
63 words
A cast steel alloy having high tensile strength, metal-to-metal wear resistance, and oxidation resistance, said alloy consisting essentially of, in weight percent, about 1.0% maximum carbon, from 10% to about 16% manganese, about 0.07% maximum phosphorus, about 0.1% maximum sulfur, 4% to about 6% silicon, 4% to about 6% chromium, 4% to about 6% nickel, about 0.05% maximum nitrogen, and balance essentially iron.
Claim 12
Dependent Claim
64 words
A hot worked product having superior galling resistance, metal-to-metal wear resistance, and good impact resistance and corrosion resistance, said product being fabricated from a steel alloy consisting essentially of, in weight percent, 0.05% maximum carbon, from 11% to about 14% manganese, 4% to about 6% silicon, 4% to about 6% chromium, 4.5% to about 6% nickel, about 0.05% maximum nitrogen, and balance essentially iron.
Claim 13
Dependent Claim
64 words
A hot worked product having superior galling resistance, metal-to-metal wear resistance, and good impact resistance and corrosion resistance, said product being fabricated from a steel alloy consisting essentially of, in weight percent, 0.05% maximum carbon, from 11% to about 14% manganese, 4% to about 6% silicon, 4% to about 6% chromium, 4.5% to about 6% nickel, about 0.05% maximum nitrogen, and balance essentially iron.
Claim 14
Dependent Claim
46 words
The product claimed in claim 10, wherein said alloy consists essentially of 0.04% maximum carbon, from 12% to about 13.5% manganese, about 4.5% to about 5.2% silicon, about 4.7% to about 5.3% chromium, about 5% to about 5.5% nickel, 0.05% maximum nitrogen, and balance essentially iron.
Claim 15
Dependent Claim
64 words
A sintered powder steel alloy having high tensile strength, metal-to-metal wear resistance, and oxidation resistance, said alloy consisting essentially of, in weight percent, about 1.0% maximum carbon, from 10% to about 16% manganese, about 0.07% maximum phosphorus, about 0.1% maximum sulfur, 4% to about 6% silicon, 4% to about 6% chromium, 4% to about 6% nickel, about 0.05% maximum nitrogen, and balance essentially iron.
Claim 16
Dependent Claim
64 words
A sintered powder steel alloy having high tensile strength, metal-to-metal wear resistance, and oxidation resistance, said alloy consisting essentially of, in weight percent, about 1.0% maximum carbon, from 10% to about 16% manganese, about 0.07% maximum phosphorus, about 0.1% maximum sulfur, 4% to about 6% silicon, 4% to about 6% chromium, 4% to about 6% nickel, about 0.05% maximum nitrogen, and balance essentially iron.
Claim 17
Dependent Claim
64 words
A cold worked product having superior galling resistance, metal-to-metal wear resistance, and good impact resistance and corrosion resistance, said product being fabricated from a steel alloy consisting essentially of, in weight percent, 0.05% maximum carbon, from 11% to about 14% manganese, 4% to about 6% silicon, 4% to about 6% chromium, 4.5% to about 6% nickel, about 0.05% maximum nitrogen, and balance essentially iron.
Claim 18
Dependent Claim
64 words
A cold worked product having superior galling resistance, metal-to-metal wear resistance, and good impact resistance and corrosion resistance, said product being fabricated from a steel alloy consisting essentially of, in weight percent, 0.05% maximum carbon, from 11% to about 14% manganese, 4% to about 6% silicon, 4% to about 6% chromium, 4.5% to about 6% nickel, about 0.05% maximum nitrogen, and balance essentially iron.
References Cited (Backward Citations)
US1561306A
Cited
US3912503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |