EP1431408A1 - Acier inoxydable austénitique CrNiMnCu à basse teneur en nickel - Google Patents

Acier inoxydable austénitique CrNiMnCu à basse teneur en nickel Download PDF

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Publication number
EP1431408A1
EP1431408A1 EP02028526A EP02028526A EP1431408A1 EP 1431408 A1 EP1431408 A1 EP 1431408A1 EP 02028526 A EP02028526 A EP 02028526A EP 02028526 A EP02028526 A EP 02028526A EP 1431408 A1 EP1431408 A1 EP 1431408A1
Authority
EP
European Patent Office
Prior art keywords
stainless steel
austenitic stainless
nickel
manganese
containing chromium
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.)
Granted
Application number
EP02028526A
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German (de)
English (en)
Other versions
EP1431408B1 (fr
Inventor
Meng-Hsin Hsieh
Yi-Cheng Wu
Pei-Te Huang
Hao-Shang Liu
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.)
Yieh United Steel Corp
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Yieh United Steel Corp
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=32338054&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1431408(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to ES02028526T priority Critical patent/ES2277611T3/es
Priority to EP02028526A priority patent/EP1431408B1/fr
Priority to SI200230469T priority patent/SI1431408T1/sl
Priority to PT02028526T priority patent/PT1431408E/pt
Priority to AT02028526T priority patent/ATE346174T1/de
Application filed by Yieh United Steel Corp filed Critical Yieh United Steel Corp
Priority to DK02028526T priority patent/DK1431408T3/da
Priority to DE60216304T priority patent/DE60216304T2/de
Publication of EP1431408A1 publication Critical patent/EP1431408A1/fr
Publication of EP1431408B1 publication Critical patent/EP1431408B1/fr
Application granted granted Critical
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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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
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • 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

  • This invention relates to an austenitic stainless steel, more particularly to a low nickel containing chromium-nickel-manganese-copper austenitic stainless steel.
  • U.S. Patent No. 5,286,310 discloses a low nickel containing chromium-nickel-manganese-copper austenitic stainless steel that has a reduced nickel content and acceptable metallographic structure, mechanical strength, corrosion resistance and workability.
  • the aforesaid austenitic stainless steel contains at least 16.5% by weight of chromium so as to provide acceptable corrosion resistance. However, the chromium content should not exceed 17.5% by weight so as to prevent undesired formation of delta ferrite ( ⁇ -ferrite) during hot working and impairment to hot workability.
  • the aforesaid austenitic stainless steel further contains at least 2.5% by weight of nickel so as to improve cold workability and so as to inhibit transformation of austenite into martensite. However, nickel content should not exceed 5% by weight due to the relatively high price thereof.
  • the aforesaid austenitic stainless steel is capable of providing acceptable corrosion resistance and cold or hot workability, the chromium content thereof is still high (previous investigation has shown that at least 17% by weight of chromium is necessary to provide minimum levels of corrosion resistance), which can impair stability of the austenitic stainless steel and which can cause cracking during hot rolling.
  • an austenitic stainless steel that comprises: (a) 0.03wt% to 0.12wt% of C; (b) 0.2wt% to 1.0wt% of Si; (c) 7.5wt% to 10.5wt% of Mn; (d) 14.0wt% to 16.0wt% of Cr; (e) 1.0wt% to 5.0wt% of Ni; (f) 0.04wt% to 0.25wt% of N; (g) 1.0wt% to 3.5wt% of Cu; (h) trace amount of Mo; and the balance being Fe and incidental impurities.
  • the preferred embodiment of the low nickel containing chromium-nickel-manganese-copper austenitic stainless steel of the present invention comprises: (a) 0.03wt% to 0.12wt% of C; (b) 0.2wt% to 1.0wt% of Si; (c) 7.5wt% to 10.5wt% of Mn; (d) 14.0wt% to 16.0wt% of Cr; (e) 1.0wt% to 5.0wt% of Ni; (f) 0.04wt% to 0.25wt% of N; (g) 1.0wt% to 3.5wt% of Cu; (h) trace amount of Mo; and the balance being Fe and incidental impurities.
  • the austenitic stainless steel can further comprise 5 to 30 ppm of B so as to improve hot workability.
  • the contents of harmful impurities, such as S (sulfur) and P (phosphorous), are as small as possible.
  • S (sulfur) and P (phosphorous) are as small as possible.
  • the S content is limited to 150 ppm
  • the P content is limited to 0.06wt%.
  • Fig. 1 illustrates the relationship between the ⁇ -ferrite content of the preferred embodiment of the austenitic stainless steel of this invention and temperature. The results show that when temperature is raised to above 1250°C during hot rolling, the ⁇ -ferrite content rises sharply, which results in the risk of edge cracking of a rolled plate of the austenitic stainless steel. In addition, a minimum temperature of 1050°C during hot rolling is required so as to obtain the requisite mechanical strength.
  • Table 2 illustrates a corrosion resistance test (ASTM B117) using salt fog for different test specimens of the austenitic stainless steel of Examples 10 to 12 and comparative Example 6 (type 304 stainless steel), which differ in composition (only elements Ni, C, Si, Mn, Cr, Cu, and B are shown).
  • the test results show that each Example of the austenitic stainless steel of this invention has a corrosion rate that is as low as that of the type 304 stainless steel (no more than 0.1%) of the prior art.
  • the chromium content in each of the Examples 1 to 12 of the austenitic stainless steel of this invention is less than 17wt%, which is a minimum requirement of the prior art for providing minimum levels of corrosion resistance.
  • Table 3 illustrates compositions of test specimens of the austenitic stainless steel of Examples 13 to 22 and comparative Examples 7 to 10 (only elements Ni, C, Si, Mn, Cr, and Cu are shown).
  • Table 4 illustrates a mechanical strength test for the test specimens of the austenitic stainless steel of the Examples 13 to 22 and the comparative Examples 7 to 10. The test results show that the austenitic stainless steel of this invention has an elongation better than those of type 304 stainless steel of the prior art. Other mechanical properties, such as tensile strength, yield strength, and hardness, of the austenitic stainless steel of this invention are comparable to those of type 304 stainless steel of the prior art.
  • the austenitic stainless steel of this invention is capable of exhibiting excellent mechanical strength, corrosion resistance, and phase stability during hot or cold working with a relatively low nickel content and a low chromium content as compared to those of the prior art.

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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)
  • Catalysts (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
EP02028526A 2002-12-19 2002-12-19 Acier inoxydable austénitique CrNiMnCu à basse teneur en nickel Revoked EP1431408B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP02028526A EP1431408B1 (fr) 2002-12-19 2002-12-19 Acier inoxydable austénitique CrNiMnCu à basse teneur en nickel
SI200230469T SI1431408T1 (sl) 2002-12-19 2002-12-19 AVSTENTIÄŚNO NERJAVEÄŚE CrNiMnCu JEKLO Z NIZKO VSEBNOSTJO NIKLJA
PT02028526T PT1431408E (pt) 2002-12-19 2002-12-19 Aço inoxidável austenítico de crómio-níquel-manganésio-cobre contendo pouco níquel.
AT02028526T ATE346174T1 (de) 2002-12-19 2002-12-19 Austenitischer rostfreier crnimncu stahl mit niedrigem nickel-gehalt
ES02028526T ES2277611T3 (es) 2002-12-19 2002-12-19 Acero inoxidable austenitico crnimncu con bajo contenido en niquel.
DK02028526T DK1431408T3 (da) 2002-12-19 2002-12-19 Austenitisk rustfrit stål med lavt nikkelindhold og indeholdende chrom-nikkel-mangan-kobber
DE60216304T DE60216304T2 (de) 2002-12-19 2002-12-19 Austenitischer rostfreier CrNiMnCu Stahl mit niedrigem Nickelgehalt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02028526A EP1431408B1 (fr) 2002-12-19 2002-12-19 Acier inoxydable austénitique CrNiMnCu à basse teneur en nickel

Publications (2)

Publication Number Publication Date
EP1431408A1 true EP1431408A1 (fr) 2004-06-23
EP1431408B1 EP1431408B1 (fr) 2006-11-22

Family

ID=32338054

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02028526A Revoked EP1431408B1 (fr) 2002-12-19 2002-12-19 Acier inoxydable austénitique CrNiMnCu à basse teneur en nickel

Country Status (7)

Country Link
EP (1) EP1431408B1 (fr)
AT (1) ATE346174T1 (fr)
DE (1) DE60216304T2 (fr)
DK (1) DK1431408T3 (fr)
ES (1) ES2277611T3 (fr)
PT (1) PT1431408E (fr)
SI (1) SI1431408T1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2566994A1 (fr) * 2010-05-06 2013-03-13 Outokumpu Oyj Acier inoxydable austénitique à faible teneur en nickel et ses utilisations
US8540933B2 (en) 2009-01-30 2013-09-24 Sandvik Intellectual Property Ab Stainless austenitic low Ni steel alloy
US8608873B2 (en) 2008-09-11 2013-12-17 Outokumpu Nirosta Gmbh Stainless steel, cold strip produced from this steel, and method for producing a flat steel product from this steel
CN112593059A (zh) * 2020-12-02 2021-04-02 成都先进金属材料产业技术研究院有限公司 降低马氏体不锈钢中δ铁素体含量的热变形方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB995068A (en) * 1963-10-14 1965-06-10 Allegheny Ludlum Steel Improvements in or relating to austenitic stainless steel
US3756807A (en) * 1970-01-13 1973-09-04 Nisshin Steel Co Ltd Austenitic stainless steels
GB2075550A (en) * 1980-05-05 1981-11-18 Armco Inc Abrasion Resistant Austenitic Stainless Steel
JPS61124556A (ja) * 1984-11-20 1986-06-12 Kawasaki Steel Corp 低ニツケルオ−ステナイト系ステンレス鋼板およびその製造方法
US4946644A (en) * 1989-03-03 1990-08-07 Baltimore Specialty Steels Corporation Austenitic stainless steel with improved castability
ES2142756A1 (es) * 1998-04-22 2000-04-16 Acerinox Sa Acero inoxidable austenitico con bajo contenido en niquel.
GB2359095A (en) * 2000-02-14 2001-08-15 Jindal Strips Ltd Stainless steel

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB995068A (en) * 1963-10-14 1965-06-10 Allegheny Ludlum Steel Improvements in or relating to austenitic stainless steel
US3756807A (en) * 1970-01-13 1973-09-04 Nisshin Steel Co Ltd Austenitic stainless steels
GB2075550A (en) * 1980-05-05 1981-11-18 Armco Inc Abrasion Resistant Austenitic Stainless Steel
JPS61124556A (ja) * 1984-11-20 1986-06-12 Kawasaki Steel Corp 低ニツケルオ−ステナイト系ステンレス鋼板およびその製造方法
US4946644A (en) * 1989-03-03 1990-08-07 Baltimore Specialty Steels Corporation Austenitic stainless steel with improved castability
ES2142756A1 (es) * 1998-04-22 2000-04-16 Acerinox Sa Acero inoxidable austenitico con bajo contenido en niquel.
GB2359095A (en) * 2000-02-14 2001-08-15 Jindal Strips Ltd Stainless steel

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
DATABASE CA [online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; SANCHEZ, R. ET AL: "Properties of an austenitic stainless with less than 2% nickel", XP002232037, retrieved from STN Database accession no. 124:152049 *
INNOVATION STAINLESS STEEL, EUROPEAN STAINLESS STEEL CONFERENCE, 1ST, FLORENCE, OCT. 11-14, 1993 (1993), VOLUME 2, 2.231-6 PUBLISHER: ASSOCIAZIONE ITALIANA DI METALLURGIA, MILAN, ITALY., XP001135086 *
PATENT ABSTRACTS OF JAPAN vol. 010, no. 314 (C - 380) 24 October 1986 (1986-10-24) *
PECKNER D ET AL: "HANDBOOK OF STAINLESS STEELS", MCGRAW-HILL, NEW YORK, ISBN: 0-07-049147-X, XP002053955 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8608873B2 (en) 2008-09-11 2013-12-17 Outokumpu Nirosta Gmbh Stainless steel, cold strip produced from this steel, and method for producing a flat steel product from this steel
US8540933B2 (en) 2009-01-30 2013-09-24 Sandvik Intellectual Property Ab Stainless austenitic low Ni steel alloy
EP2566994A1 (fr) * 2010-05-06 2013-03-13 Outokumpu Oyj Acier inoxydable austénitique à faible teneur en nickel et ses utilisations
EP2566994A4 (fr) * 2010-05-06 2017-04-05 Outokumpu Oyj Acier inoxydable austénitique à faible teneur en nickel et ses utilisations
CN112593059A (zh) * 2020-12-02 2021-04-02 成都先进金属材料产业技术研究院有限公司 降低马氏体不锈钢中δ铁素体含量的热变形方法
CN112593059B (zh) * 2020-12-02 2022-05-24 成都先进金属材料产业技术研究院有限公司 降低马氏体不锈钢中δ铁素体含量的热变形方法

Also Published As

Publication number Publication date
EP1431408B1 (fr) 2006-11-22
ES2277611T3 (es) 2007-07-16
DE60216304T2 (de) 2007-06-21
DK1431408T3 (da) 2007-03-12
PT1431408E (pt) 2007-02-28
DE60216304D1 (de) 2007-01-04
SI1431408T1 (sl) 2007-06-30
ATE346174T1 (de) 2006-12-15

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