US3784373A - Austenitic stainless steel - Google Patents

Austenitic stainless steel Download PDF

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Publication number
US3784373A
US3784373A US00234305A US3784373DA US3784373A US 3784373 A US3784373 A US 3784373A US 00234305 A US00234305 A US 00234305A US 3784373D A US3784373D A US 3784373DA US 3784373 A US3784373 A US 3784373A
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max
percent
stainless steel
resistance
austenitic stainless
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M Ornitz
A Moskowitz
J Bressanelli
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Crucible Materials Corp
Crucible Inc
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Crucible Inc
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Assigned to COLT INDUSTRIES OPERATING CORP. reassignment COLT INDUSTRIES OPERATING CORP. MERGER AND CHANGE OF NAME Assignors: CRUCIBLE CENTER COMPANY (INTO) CRUCIBLE INC. (CHANGED TO)
Assigned to CRUCIBLE MATERIALS CORPORATION reassignment CRUCIBLE MATERIALS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: COLT INDUSTRIES OPERATING CORP.
Assigned to CHASE MANHATTAN BANK, THE (NATIONAL ASSOCIATION) AS AGENT, MELLON BANK, N.A. FOR THE CHASE MANHATTAN BANK (NATIONAL ASSOCIATION) AND MELLON BANK N.A. reassignment CHASE MANHATTAN BANK, THE (NATIONAL ASSOCIATION) AS AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). 1ST Assignors: CRUCIBLE MATERIALS CORPORATION, A CORP. OF DE.
Assigned to MELLON BANK, N.A. AS AGENT FOR MELLON BANK N.A. & MELLON FINANCIAL SERVICES CORPORATION, MELLON FINANCIAL SERVICES CORPORATION reassignment MELLON BANK, N.A. AS AGENT FOR MELLON BANK N.A. & MELLON FINANCIAL SERVICES CORPORATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). 2ND Assignors: CRUCIBLE MATERIALS CORPORATION, A CORP. OF DE.
Assigned to CRUCIBLE MATERIALS CORPORATION reassignment CRUCIBLE MATERIALS CORPORATION RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: MELLON BANK, N.A.
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel

Definitions

  • ABSTRACT H C H 75/128 F 75/l28 N
  • NICKEL CONTENT (7o) 1 AUSTENITIC STAINLESS STEEL In view of recent efforts with respect to pollution abatement various steps have been taken to reduce the emissions, particularly of unburnt hydrocarbons from stainless steel having chromium and nickel within the ranges of 20 to 30 percent and 22 to 32 percent, respectively, with a boron additive of up to 0.01 percent, while controlling manganese and silicon. More specifithe exhaust of motor vehicles. For this purpose it is 5 cally, the desired result is achieved by an alloy within known to use a thermal reactor which is essentially an the ranges set forth on Table l. afterburner in that unburnt components of the exhaust TABLE I gases such as hydrocarbons and carbon monoxide are further oxidized in the afterburner to nontoxic gas, e.g.
  • AISI Type 330 has been used for the purpose but in B 0J0 Q05 fth h. h k l t t k l Boron 0.0! max. 0.00l/0.005 0002 view 0 e 1g me e con en e.g. percent n1c e "on y Hal BaL the materlal costs for the reactor are extremely hlgh.
  • AISI Type 310 has been proposed but it does not have sufficient resistance to distortion during 20
  • Table 11 lists alloy Compositions melted and tested in high temperature service. establishing the above composition limits.
  • FIG. 1 is a graph showing the effect of manganese on the oxidation resistance of alloys of the type of the present invention
  • FIG. 2 is a graph showing the effect of silicon with respect to oxidation resistance
  • F 10.3 is a graph showing the effect of nickel with respect to thermal expansion.
  • FTG. 4 is a graph showing the effect of chromium on .oxidation resistance at high temperatures.
  • Test specimens were placed in porcelain crucible and weighed. The crucible containing the specimens was then placed in an air furnace. The test cycle consisted of heating in still air at the desired temperature for 20 hours and then air cooling to room temperature. Crucibles containing the specimens were reweighed and, since all oxide that formed was collected in the crucibles, a net weight gain was recorded. The test cycle was repeated until the desired total exposure time was attained.
  • Alloy 2525 in accordance with the invention, was subjected to TIG welding at speeds of up to 100 inches per minute; with the alloy in accordance with the invention crack-free welds were produced over a wide range of welding conditions and heat inputs. In contrast AISI Type 330 exhibited significant weld cracking under identical conditions.
  • silicon is significant for improving oxidation resistance at high temperatures as may be seen from FIG. 2 showing steels having 20 percent chromium and 20 percent nickel containing varying silicon contents and tested at l,900 and 2,000 F for 200 hours. Although silicon is significant for this purpose it has been found that if silicon is above 0.7 or 1 percent the susceptibility of the alloy to weld cracking increases. Specifically, the 2525 alloy of Table I, but containing 1.19 percent silicon, consistently showed longitudinal weld cracking after TIG welding; whereas, Alloy 2525 of Table I containing 0.53 percent silicon was immune to cracking during identical welding operations.
  • Nickel is a critical addition for high temperature (creep) strengths and is preferred within the range of 24 to 30 percent; higher or lower nickel levels than claimed result in lower creep strength. Also, as shown in FIG. 3, nickel has a strong effect on the oxidation resistance at high temperature and for this purpose also is preferred within the range of 24 to 30 percent. Chromium is also important for high temperature strength and, as shown in FIG. 4, is critical for oxidation resistance and also for resistance to corrosion in the intended exhaust gas environment within the range of 22 to 28 percent. FIG. 4 reports cyclic tests at 1,900 and 2,000 F for 200 hours. If, however, chromium is above about 30 percent it will undly embrittle the alloy, aside from increasing the cost thereof.
  • An austenitic stainless steel characterized by resistance to distortion at high temperature, and resistance to oxidation and scaling consisting essentially, in weight percent, of carbon 0.08 max., manganese 2.0 max., phosphorus 0.04 max., sulfur 0.04 max., silicon 0.7 max., nickel 24 to 30, chromium 23 to 28, nitrogen 0.08 max., boron 0.001 to 0.005 and the balance iron.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Arc Welding In General (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
US00234305A 1972-03-13 1972-03-13 Austenitic stainless steel Expired - Lifetime US3784373A (en)

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US23430572A 1972-03-13 1972-03-13

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US (1) US3784373A (enrdf_load_stackoverflow)
JP (1) JPS5129847B2 (enrdf_load_stackoverflow)
CA (1) CA981488A (enrdf_load_stackoverflow)
DE (1) DE2308107A1 (enrdf_load_stackoverflow)
FR (1) FR2175755B1 (enrdf_load_stackoverflow)
GB (1) GB1368557A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4347080A (en) * 1980-01-12 1982-08-31 Daido Tokushuko K.K. Austenitic free-cutting stainless steel
US20070142689A1 (en) * 2005-12-21 2007-06-21 Basf Aktiengesellschaft Process for continuous heterogeneously catalyzed partial dehydrogenation of at least one hydrocarbon to be dehydrogenated
CN108193135A (zh) * 2018-02-08 2018-06-22 四川维珍高新材料有限公司 一种低碳高强度奥氏体耐热钢及其制备方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5595107U (enrdf_load_stackoverflow) * 1978-12-25 1980-07-02

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2121391A (en) * 1933-11-30 1938-06-21 Rustless Iron & Steel Corp Noncorrodible alloy articles and method of making same
US3159479A (en) * 1962-11-28 1964-12-01 Int Nickel Co Austenitic chromium-nickel stainless steels resistant to stress-corrosion cracking
US3306736A (en) * 1963-08-30 1967-02-28 Crucible Steel Co America Austenitic stainless steel
US3523788A (en) * 1967-06-02 1970-08-11 United States Steel Corp Austenitic stainless steel of improved stress corrosion resistance
US3573034A (en) * 1967-09-18 1971-03-30 Armco Steel Corp Stress-corrosion resistant stainless steel
US3615368A (en) * 1967-06-19 1971-10-26 Boehler & Co Ag Geb Nickel-chromium steel having increased resistance to corrosion

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2750283A (en) * 1953-05-27 1956-06-12 Armco Steel Corp Stainless steels containing boron
US3385739A (en) * 1965-04-13 1968-05-28 Eaton Yale & Towne Alloy steel articles and the method of making

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2121391A (en) * 1933-11-30 1938-06-21 Rustless Iron & Steel Corp Noncorrodible alloy articles and method of making same
US3159479A (en) * 1962-11-28 1964-12-01 Int Nickel Co Austenitic chromium-nickel stainless steels resistant to stress-corrosion cracking
US3306736A (en) * 1963-08-30 1967-02-28 Crucible Steel Co America Austenitic stainless steel
US3523788A (en) * 1967-06-02 1970-08-11 United States Steel Corp Austenitic stainless steel of improved stress corrosion resistance
US3615368A (en) * 1967-06-19 1971-10-26 Boehler & Co Ag Geb Nickel-chromium steel having increased resistance to corrosion
US3573034A (en) * 1967-09-18 1971-03-30 Armco Steel Corp Stress-corrosion resistant stainless steel

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4347080A (en) * 1980-01-12 1982-08-31 Daido Tokushuko K.K. Austenitic free-cutting stainless steel
US20070142689A1 (en) * 2005-12-21 2007-06-21 Basf Aktiengesellschaft Process for continuous heterogeneously catalyzed partial dehydrogenation of at least one hydrocarbon to be dehydrogenated
US7790942B2 (en) 2005-12-21 2010-09-07 Basf Se Process for continuous heterogeneously catalyzed partial dehydrogenation of at least one hydrocarbon to be dehydrogenated
US20100286461A1 (en) * 2005-12-21 2010-11-11 Base Se Process for continuous heterogeneously catalyzed partial dehydrogenation of at least one hydrocarbon to be dehydrogenated
US8721996B2 (en) 2005-12-21 2014-05-13 Basf Se Reactor for continuous heterogeneously catalyzed partial dehydrogenation of at least one hydrocarbon to be dehydrogenated
CN108193135A (zh) * 2018-02-08 2018-06-22 四川维珍高新材料有限公司 一种低碳高强度奥氏体耐热钢及其制备方法

Also Published As

Publication number Publication date
FR2175755B1 (enrdf_load_stackoverflow) 1976-04-09
JPS5129847B2 (enrdf_load_stackoverflow) 1976-08-27
GB1368557A (en) 1974-09-25
DE2308107A1 (de) 1973-09-27
CA981488A (en) 1976-01-13
JPS492711A (enrdf_load_stackoverflow) 1974-01-11
FR2175755A1 (enrdf_load_stackoverflow) 1973-10-26

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Free format text: MERGER AND CHANGE OF NAME;ASSIGNOR:CRUCIBLE CENTER COMPANY (INTO) CRUCIBLE INC. (CHANGED TO);REEL/FRAME:004120/0308

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