EP0649913B1 - Acier inoxydable austénitique à hautes caractéristiques ayant une grande stabilité structurale et utilisations - Google Patents

Acier inoxydable austénitique à hautes caractéristiques ayant une grande stabilité structurale et utilisations Download PDF

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Publication number
EP0649913B1
EP0649913B1 EP94402202A EP94402202A EP0649913B1 EP 0649913 B1 EP0649913 B1 EP 0649913B1 EP 94402202 A EP94402202 A EP 94402202A EP 94402202 A EP94402202 A EP 94402202A EP 0649913 B1 EP0649913 B1 EP 0649913B1
Authority
EP
European Patent Office
Prior art keywords
steel according
stainless steel
corrosion
chemical composition
manufacturing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94402202A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0649913A1 (fr
Inventor
François Dupoiron
Jean-Christophe Gagnepain
Richard Cozar
Bernard Mayonobe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Creusot Loire SA
Creusot Loire Industrie SA
TECPHY
Original Assignee
Creusot Loire SA
Creusot Loire Industrie SA
TECPHY
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Creusot Loire SA, Creusot Loire Industrie SA, TECPHY filed Critical Creusot Loire SA
Publication of EP0649913A1 publication Critical patent/EP0649913A1/fr
Application granted granted Critical
Publication of EP0649913B1 publication Critical patent/EP0649913B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese

Definitions

  • the present invention relates to stainless steel austenitic with high mechanical resistance, high corrosion resistance and very good structural stability.
  • High austenitic stainless steels mechanical characteristics and high resistance to known corrosion also have the disadvantage of not be able to be used in the form of solid parts. In effect, when parts cool, instability of the structure causes intermetallic precipitation which very markedly deteriorate the resistance to corrosion and mechanical properties of steel.
  • the purpose of the present invention is to provide high austenitic stainless steel mechanical and which simultaneously has a very large corrosion resistance in a chlorinated medium and a very good structural stability.
  • the subject of the invention is an austenitic stainless steel with high mechanical characteristics, high resistance to corrosion and having great structural stability, the chemical composition of which comprises by weight: 23% ⁇ Cr ⁇ 28% 15% ⁇ Ni ⁇ 28% 0.5% ⁇ Mn ⁇ 6% 0% ⁇ Cu ⁇ 5% 0% ⁇ C ⁇ 0.06% 0% ⁇ If ⁇ 1% 0% ⁇ Nb ⁇ 0.5% 0% ⁇ V ⁇ 0.5% 0% ⁇ Al ⁇ 0.1% 3% ⁇ Mo ⁇ 8% 0.35% ⁇ N ⁇ 0.8% 1% ⁇ W ⁇ 5% the rest being made up of iron and impurities linked to the production.
  • the chemical composition of the steel comprises by weight: 23% ⁇ Cr ⁇ 26% 21% ⁇ Ni ⁇ 23% 2% ⁇ Mn ⁇ 3.5% 1% ⁇ Cu ⁇ 2% 0% ⁇ C ⁇ 0.03% 0% ⁇ If ⁇ 0.4% 0% ⁇ Nb ⁇ 0.5% 0% ⁇ Al ⁇ 0.1% 4.5% ⁇ Mo ⁇ 6.5% 0.4% ⁇ N ⁇ 0.55% 2% ⁇ W ⁇ 3.5% the rest being made up of iron and impurities linked to the production.
  • the chemical composition of the steel must, preferably satisfy the relationship: 113 + 16 (% Mo + 0.7% W) + 525% N> 420
  • this steel can be used for the production of solid parts. He can also be used for manufacturing equipment for massive oil rigs or for manufacturing equipment for chemical plants, for pulp mills paper, pollution control facilities or for manufacture of containers for transporting products corrosive, or finally, for the manufacture of ship. This steel can also be used to make clad sheets.
  • stainless steels austenitics which are alloys based on iron and high chromium and nickel content which have a structure naturally austenitic in the solid state practically at any temperature.
  • the structure is not 100% austenitic near the solidification point but becomes solid as soon as the temperature lowers.
  • superaustenitic the structure is 100% austenitic upon solidification.
  • the inventors unexpectedly found that by simultaneously adding to these steels contents high in nitrogen: from 0.35% by weight to 0.8% by weight, and preferably from 0.4% to 0.55% and in tungsten: from 1% by weight at 5% by weight, and preferably 2% to 3.5%, we obtained at the same time high mechanical characteristics, very high resistance to corrosion in the environment chlorinated and very good structural stability, i.e. kinetics of precipitation of intermetallic phases at very slow high temperature.
  • Such steels always contain a little carbon, silicon and aluminum. Carbon content must be less than 0.06% and preferably less 0.03% to avoid precipitation of carbide at grain boundaries.
  • the silicon and aluminum that served as deoxidizers during processing are limited to 1% for silicon and 0.1% for aluminum.
  • the corrosion rate in hydrochloric medium is 100 MDJ (mg / dm 2 / day); after hyper quenching followed by an sensitization treatment by maintaining at 800 ° C. for 15 min, the corrosion rate under the same conditions is 200 MDJ.
  • the steel according to the invention is much less sensitive to thermal cycles of sensitization. It results that it is possible to produce clad sheets consisting of a layer of steel according to the invention and a layer of structural steel, the properties of which of stainless plating are comparable to the properties a massive stainless steel sheet made in the same shade.
  • the steel according to the invention having a large structural stability can be used to manufacture including molded parts, forgings, rolled bars, rolled sheets, profiles, seamless tubes and welded tubes in particular when these objects are massive, that is to say when they are used in the form of thick pieces i.e. minimum thickness greater than 4 mm, especially when these are pieces thicker than 4 mm and less than 40 mm; they then present a good homogeneity of characteristics in thickness; for thicknesses greater than 40 mm, very good stability structural maintains high levels of resilience and ductility in thickness.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Pens And Brushes (AREA)
  • Catalysts (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Laminated Bodies (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Physical Vapour Deposition (AREA)
  • Heat Treatment Of Articles (AREA)
EP94402202A 1993-10-21 1994-10-03 Acier inoxydable austénitique à hautes caractéristiques ayant une grande stabilité structurale et utilisations Expired - Lifetime EP0649913B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9312578A FR2711674B1 (fr) 1993-10-21 1993-10-21 Acier inoxydable austénitique à hautes caractéristiques ayant une grande stabilité structurale et utilisations.
FR9312578 1993-10-21

Publications (2)

Publication Number Publication Date
EP0649913A1 EP0649913A1 (fr) 1995-04-26
EP0649913B1 true EP0649913B1 (fr) 2000-01-26

Family

ID=9452089

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94402202A Expired - Lifetime EP0649913B1 (fr) 1993-10-21 1994-10-03 Acier inoxydable austénitique à hautes caractéristiques ayant une grande stabilité structurale et utilisations

Country Status (12)

Country Link
US (1) US5494636A (es)
EP (1) EP0649913B1 (es)
AT (1) ATE189268T1 (es)
CA (1) CA2118288C (es)
DE (1) DE69422772T2 (es)
DK (1) DK0649913T3 (es)
ES (1) ES2141808T3 (es)
FI (1) FI109032B (es)
FR (1) FR2711674B1 (es)
GR (1) GR3033188T3 (es)
NO (1) NO302710B1 (es)
PT (1) PT649913E (es)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6354219B1 (en) 1998-05-01 2002-03-12 Owen Oil Tools, Inc. Shaped-charge liner
WO1999061673A1 (en) * 1998-05-27 1999-12-02 U.S. Department Of Commerce And National Institute Of Standards And Technology High nitrogen stainless steel
DE19924098A1 (de) * 1999-05-26 2000-12-07 Boehringer Ingelheim Pharma Edelstahlkanister für treibgasbetriebene Dosieraerosole
US6739333B1 (en) * 1999-05-26 2004-05-25 Boehringer Ingelheim Pharma Kg Stainless steel canister for propellant-driven metering aerosols
SE527177C2 (sv) * 2001-09-25 2006-01-17 Sandvik Intellectual Property Användning av ett austenitiskt rostfritt stål
CA2502206C (en) * 2003-03-20 2010-11-16 Sumitomo Metal Industries, Ltd. Stainless steel for high pressure hydrogen gas, vessel and equipment comprising the steel
US20040221929A1 (en) 2003-05-09 2004-11-11 Hebda John J. Processing of titanium-aluminum-vanadium alloys and products made thereby
US6960820B2 (en) * 2003-07-01 2005-11-01 International Business Machines Corporation Bipolar transistor self-alignment with raised extrinsic base extension and methods of forming same
US7837812B2 (en) 2004-05-21 2010-11-23 Ati Properties, Inc. Metastable beta-titanium alloys and methods of processing the same by direct aging
SE528008C2 (sv) * 2004-12-28 2006-08-01 Outokumpu Stainless Ab Austenitiskt rostfritt stål och stålprodukt
US8430075B2 (en) * 2008-12-16 2013-04-30 L.E. Jones Company Superaustenitic stainless steel and method of making and use thereof
US10053758B2 (en) * 2010-01-22 2018-08-21 Ati Properties Llc Production of high strength titanium
US9255316B2 (en) 2010-07-19 2016-02-09 Ati Properties, Inc. Processing of α+β titanium alloys
US8499605B2 (en) 2010-07-28 2013-08-06 Ati Properties, Inc. Hot stretch straightening of high strength α/β processed titanium
US8613818B2 (en) 2010-09-15 2013-12-24 Ati Properties, Inc. Processing routes for titanium and titanium alloys
US9206497B2 (en) 2010-09-15 2015-12-08 Ati Properties, Inc. Methods for processing titanium alloys
US10513755B2 (en) 2010-09-23 2019-12-24 Ati Properties Llc High strength alpha/beta titanium alloy fasteners and fastener stock
RU2603735C2 (ru) * 2011-05-26 2016-11-27 Юнайтед Пайплайнс Лимитед Аустенитная нержавеющая сталь
US8652400B2 (en) 2011-06-01 2014-02-18 Ati Properties, Inc. Thermo-mechanical processing of nickel-base alloys
US9347121B2 (en) * 2011-12-20 2016-05-24 Ati Properties, Inc. High strength, corrosion resistant austenitic alloys
US9050647B2 (en) 2013-03-15 2015-06-09 Ati Properties, Inc. Split-pass open-die forging for hard-to-forge, strain-path sensitive titanium-base and nickel-base alloys
US9869003B2 (en) 2013-02-26 2018-01-16 Ati Properties Llc Methods for processing alloys
US9192981B2 (en) 2013-03-11 2015-11-24 Ati Properties, Inc. Thermomechanical processing of high strength non-magnetic corrosion resistant material
US9777361B2 (en) 2013-03-15 2017-10-03 Ati Properties Llc Thermomechanical processing of alpha-beta titanium alloys
US11111552B2 (en) 2013-11-12 2021-09-07 Ati Properties Llc Methods for processing metal alloys
US20150337419A1 (en) * 2014-05-20 2015-11-26 Crs Holdings Inc. Austenitic Stainless Steel Alloy
US10094003B2 (en) 2015-01-12 2018-10-09 Ati Properties Llc Titanium alloy
US10502252B2 (en) 2015-11-23 2019-12-10 Ati Properties Llc Processing of alpha-beta titanium alloys
EP3390679B1 (en) 2015-12-14 2022-07-13 Swagelok Company Highly alloyed stainless steel forgings made without solution anneal
SE540488C2 (en) * 2017-03-21 2018-09-25 Valmet Oy Method for hydrolysis of lignocellulosic materials
US20190136335A1 (en) 2017-11-07 2019-05-09 Swagelok Company Highly alloyed stainless steel forgings made without solution anneal
CN116695028B (zh) * 2023-05-30 2024-05-14 鞍钢股份有限公司 一种高强韧高耐蚀性核电奥氏体不锈钢及其制造方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04218643A (ja) * 1990-12-18 1992-08-10 Hitachi Metals Ltd エンジンバルブ用耐熱合金

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US3165400A (en) * 1961-06-27 1965-01-12 Chrysler Corp Castable heat resisting iron alloy
US3969109A (en) * 1974-08-12 1976-07-13 Armco Steel Corporation Oxidation and sulfidation resistant austenitic stainless steel
EP0342574A1 (de) * 1988-05-17 1989-11-23 Thyssen Edelstahlwerke AG Korrosionsbeständiger austenitischer Stahl
JP3073754B2 (ja) * 1989-08-02 2000-08-07 日立金属株式会社 エンジンバルブ用耐熱鋼
SE465373B (sv) * 1990-01-15 1991-09-02 Avesta Ab Austenitiskt rostfritt staal
JP2500162B2 (ja) * 1991-11-11 1996-05-29 住友金属工業株式会社 耐食性に優れた高強度二相ステンレス鋼
IT1257695B (it) * 1992-04-24 1996-02-01 Acciaio austeno-ferritico avente alta resistenza alla corrosione ed elevato carico di snervamento allo stato solubizzato.
FR2705689B1 (fr) * 1993-05-28 1995-08-25 Creusot Loire Acier inoxydable austénitique à haute résistance à la corrosion par les milieux chlorurés et sulfuriques et utilisations.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04218643A (ja) * 1990-12-18 1992-08-10 Hitachi Metals Ltd エンジンバルブ用耐熱合金

Also Published As

Publication number Publication date
FI944908A0 (fi) 1994-10-19
FR2711674B1 (fr) 1996-01-12
CA2118288C (fr) 2004-10-05
NO302710B1 (no) 1998-04-14
DE69422772T2 (de) 2000-06-08
US5494636A (en) 1996-02-27
ES2141808T3 (es) 2000-04-01
FI944908A (fi) 1995-04-22
NO943942D0 (no) 1994-10-18
FI109032B (fi) 2002-05-15
EP0649913A1 (fr) 1995-04-26
ATE189268T1 (de) 2000-02-15
NO943942L (no) 1995-04-24
DK0649913T3 (da) 2000-06-19
FR2711674A1 (fr) 1995-05-05
CA2118288A1 (fr) 1995-04-22
PT649913E (pt) 2000-06-30
GR3033188T3 (en) 2000-08-31
DE69422772D1 (de) 2000-03-02

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