US3854938A
Expired / Lapsed
US
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Austenitic stainless steel
Assignee: Allegheny Ludlum Corp
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Filing: 1972-10-16
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Granted: 1974-12-17
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Expires: 1992-10-16
Abstract
Abstract An austenitic stainless steel which is suitable for use as a filler metal in gas shielded arc welding and a gas shielded arc welding process employing said steel as a filler metal. The steel consists essentially of, in weight percent, up to 0.1 percent carbon, 7.5 - 16.0 percent manganese, up to 1.0 percent silicon, 17.5 - 26.0 percent chromium, 5.0 - 17.0 percent nickel, 0.75 4.0 percent molybdenum, 0.2 - 3.8 percent nitrogen, balance iron and incidental impurities, and is additionally limited as follows: 1. The ratio of austenitizing elements to ferritizing elements is greater than 1 in accordance with the following expression: (% Ni + 30 (%C + %N) + 0.5 (%Mn)) /(%Cr + %Mo + 1.5 (%Si)) > 1 2. The manganese to nitrogen ratio is at least 42; and 3. The sum of the chromium, manganese, nickel and molybdenum content is at least 38.
Inventors
- 👤 H Baybrook
- 👤 J Chivinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:23
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3053; B23K35/308; B23K35/3086; C; C22; C22C; C22C38/00; C22C38/001; C22C38/18; C22C38/40; C22C38/58
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
127 words
AN AUSTENITIC STAINLESS STEEL FILLER METAL FOR USE IN GAS SHIELDED ARC WELDING, CONSISTING ESSENTIALLY OF, IN WEIGHT PERCENT, UP TO 0.1 PERCENT CARBON, 8.5-14.0 PERCENT MANGANESE, UP TO 0.6 PERCENT SILICON, 18.5-23.0 PERCENT CHROMIUM, 10.0-16.0 PERCENT NICKEL, 2.0-3.0 PERCENT MOLYBDENUM, 0.2-0.38 PERCENT NITROGEN, BLANCE IRON AND INCIDENTAL IMPURITIES; WHEREIN THE RATIO OF AUSTENITIZING ELEMENTS TO FERITIZING ELEMENTS IS IN EXCESS OF 1 IN ACCORDANCE WITH THE FOLLOWING EXPRESSION: (%NI +30 (%C + %N) + 0.5 (%MN)/(%CR + %MO + 1.5 (%SI)) $ 1 WHEREIN SAID MANGANESE AND NITROGEN CONTENTS ARE BALANCED IN ACCORDANCE WITH THE FOLLOWING EXPRESSION: %MN/%N 42 AND WHEREIN THE SUM OF SAID CHROMIUM, MANGANESE, NICKEL AND MOLYBDENUM CONTENTS ARE IN ACCORDANCE WITH THE FOLLOWING EXPRESSION: %MN + %CR + %NI + %MO 38.
Claim 2
Dependent Claim
127 words
AN AUSTENITIC STAINLESS STEEL FILLER METAL FOR USE IN GAS SHIELDED ARC WELDING, CONSISTING ESSENTIALLY OF, IN WEIGHT PERCENT, UP TO 0.1 PERCENT CARBON, 8.5-14.0 PERCENT MANGANESE, UP TO 0.6 PERCENT SILICON, 18.5-23.0 PERCENT CHROMIUM, 10.0-16.0 PERCENT NICKEL, 2.0-3.0 PERCENT MOLYBDENUM, 0.2-0.38 PERCENT NITROGEN, BLANCE IRON AND INCIDENTAL IMPURITIES; WHEREIN THE RATIO OF AUSTENITIZING ELEMENTS TO FERITIZING ELEMENTS IS IN EXCESS OF 1 IN ACCORDANCE WITH THE FOLLOWING EXPRESSION: (%NI +30 (%C + %N) + 0.5 (%MN)/(%CR + %MO + 1.5 (%SI)) $ 1 WHEREIN SAID MANGANESE AND NITROGEN CONTENTS ARE BALANCED IN ACCORDANCE WITH THE FOLLOWING EXPRESSION: %MN/%N 42 AND WHEREIN THE SUM OF SAID CHROMIUM, MANGANESE, NICKEL AND MOLYBDENUM CONTENTS ARE IN ACCORDANCE WITH THE FOLLOWING EXPRESSION: %MN + %CR + %NI + %MO 38.
Claim 3
Dependent Claim
23 words
An austenitic stainless steel filler metal according to claim 1 having a ratio of austenitizing elements to ferritizing elements in excess of 1.1.
Claim 4
Dependent Claim
22 words
An austenitic stainless steel filler metal according to claim 1 having a percent manganese to percent nitrogen ratio of at least 45.
Claim 5
Dependent Claim
134 words
an austenitic stainless steel filler metal for use in gas shielded arc welding, consisting essentially of, in weight percent, up to 0.05 percent carbon, 8.5-14.0 percent manganese, up to 0.4 percent silicon, 18.5-23.0 percent chromium, 10.0-16.0 percent nickel, 2.0-3.0 percent molybdenum, 0.22-0.33 percent nitrogen, balance iron and incidental impurities; wherein the ratio of austenitizing elements to ferritizing elements is in excess of 1 in accordance with the following expression: (%Ni + 30 (%C + %N) + 0.5 (%Mn))/(%Cr + %Mo + 1.5 (%Si)) > 1 wherein said manganese and nitrogen contents are balanced in accordance with the following expression: %Mn/%N > or = 42 and wherein the sum of said chromium, manganese, nickel and molybdenum contents are in accordance with the following expression: %Mn + %Cr + %Ni + %Mo > or = 38.
Claim 6
Dependent Claim
134 words
an austenitic stainless steel filler metal for use in gas shielded arc welding, consisting essentially of, in weight percent, up to 0.05 percent carbon, 8.5-14.0 percent manganese, up to 0.4 percent silicon, 18.5-23.0 percent chromium, 10.0-16.0 percent nickel, 2.0-3.0 percent molybdenum, 0.22-0.33 percent nitrogen, balance iron and incidental impurities; wherein the ratio of austenitizing elements to ferritizing elements is in excess of 1 in accordance with the following expression: (%Ni + 30 (%C + %N) + 0.5 (%Mn))/(%Cr + %Mo + 1.5 (%Si)) > 1 wherein said manganese and nitrogen contents are balanced in accordance with the following expression: %Mn/%N > or = 42 and wherein the sum of said chromium, manganese, nickel and molybdenum contents are in accordance with the following expression: %Mn + %Cr + %Ni + %Mo > or = 38.
Claim 7
Dependent Claim
125 words
An austenitic stainless steel consisting essentially of, in weight percent, up to 0.1 percent carbon, 8.5-14.0 percent manganese, up to 1.0 percent silicon, 17.5-26.0 percent chromium, 10.0-16.0 percent nickel, 0.75-4.0 percent molybdenum, 022-0.33 percent nitrogen, balance iron and incidental impurities; wherein the ratio of austenitizing elements to ferritizing elements is in excess of 1 in accordance with the following expression: (%Ni + 30 (%C + %N) + 0.5 (%Mn))/(%Cr + %Mo + 1.5 (%Si)) > 1 wherein said manganese and nitrogen contents are balanced in accordance with the following expression: %Mn/%N > or = 42 and wherein the sum of said chromium, manganese, nickel and molybdenum contents are in accordance with the following expression: %Mn + %Cr + %Ni + %Mo > or = 38.
Claim 8
Dependent Claim
125 words
An austenitic stainless steel consisting essentially of, in weight percent, up to 0.1 percent carbon, 8.5-14.0 percent manganese, up to 1.0 percent silicon, 17.5-26.0 percent chromium, 10.0-16.0 percent nickel, 0.75-4.0 percent molybdenum, 022-0.33 percent nitrogen, balance iron and incidental impurities; wherein the ratio of austenitizing elements to ferritizing elements is in excess of 1 in accordance with the following expression: (%Ni + 30 (%C + %N) + 0.5 (%Mn))/(%Cr + %Mo + 1.5 (%Si)) > 1 wherein said manganese and nitrogen contents are balanced in accordance with the following expression: %Mn/%N > or = 42 and wherein the sum of said chromium, manganese, nickel and molybdenum contents are in accordance with the following expression: %Mn + %Cr + %Ni + %Mo > or = 38.
Claim 9
Dependent Claim
21 words
An austenitic stainless steel according to claim 5 having a ratio of austenitizing elements to ferritizing elements in excess of 1.1.
Claim 10
Dependent Claim
20 words
An austenitic stainless steel according to claim 5 having a percent manganese to percent nitrogen ratio of at least 45.
Claim 11
Dependent Claim
125 words
An austenitic stainless steel consisting essentially of, in weight percent, up to 0.1 percent carbon, 8.5-14.0 percent manganese, up to 1.0 percent silicon, 18.5-23.0 percent chromium, 10.0-16.0 percent nickel, 2.0-3.0 percent molybdenum, 0.2-0.38 percent nitrogen, balance iron and incidental impurities; wherein the ratio of austenitizing elements to ferritizing elements is in excess of 1 in accordance with the following expression: (%Ni + 30 (%C + %N) + 0.5 (%Mn))/(%Cr + %Mo + 1.5 (%Si)) > 1 wherein said manganese and nitrogen contents are balanced in accordance with the following expression: %Mn/%N > or = 42 and wherein the sum of said chromium, manganese, nickel and molybdenum contents are in accordance with the following expression: %Mn + %Cr + %Ni + %Mo > or = 38.
Claim 12
Dependent Claim
125 words
An austenitic stainless steel consisting essentially of, in weight percent, up to 0.1 percent carbon, 8.5-14.0 percent manganese, up to 1.0 percent silicon, 18.5-23.0 percent chromium, 10.0-16.0 percent nickel, 2.0-3.0 percent molybdenum, 0.2-0.38 percent nitrogen, balance iron and incidental impurities; wherein the ratio of austenitizing elements to ferritizing elements is in excess of 1 in accordance with the following expression: (%Ni + 30 (%C + %N) + 0.5 (%Mn))/(%Cr + %Mo + 1.5 (%Si)) > 1 wherein said manganese and nitrogen contents are balanced in accordance with the following expression: %Mn/%N > or = 42 and wherein the sum of said chromium, manganese, nickel and molybdenum contents are in accordance with the following expression: %Mn + %Cr + %Ni + %Mo > or = 38.
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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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |