WO1999032682A1 - Austenitic stainless steel including columbium - Google Patents

Austenitic stainless steel including columbium Download PDF

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Publication number
WO1999032682A1
WO1999032682A1 PCT/US1998/027602 US9827602W WO9932682A1 WO 1999032682 A1 WO1999032682 A1 WO 1999032682A1 US 9827602 W US9827602 W US 9827602W WO 9932682 A1 WO9932682 A1 WO 9932682A1
Authority
WO
WIPO (PCT)
Prior art keywords
stainless steel
columbium
austenitic stainless
weight percent
max
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.)
Ceased
Application number
PCT/US1998/027602
Other languages
English (en)
French (fr)
Inventor
James W. Underkofler
William W. Timmons
Ronald E. Bailey
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.)
Allegheny Ludlum Corp
Original Assignee
Allegheny Ludlum Corp
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 Allegheny Ludlum Corp filed Critical Allegheny Ludlum Corp
Priority to AU20954/99A priority Critical patent/AU2095499A/en
Priority to KR1020007007028A priority patent/KR100618715B1/ko
Priority to JP2000525595A priority patent/JP2001527156A/ja
Priority to EP98965499A priority patent/EP1055011A1/en
Priority to HK01102506.2A priority patent/HK1032078B/xx
Priority to BR9814425-1A priority patent/BR9814425A/pt
Priority to CA2316332A priority patent/CA2316332C/en
Publication of WO1999032682A1 publication Critical patent/WO1999032682A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • 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
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling

Definitions

  • This invention relates generally to stainless steel alloys and more particularly to the
  • the T201LN alloy was specifically designed for such applications and is unique in that it is designated as an acceptable material for applications in which high
  • the compositionally-balanced T201LN alloy consists essentially of, in weight percent, 0.03% carbon max., 6.4 to 7.5% manganese, up to 1.0% silicon, 16 to 17.5% chromium, 4.0 to 5.0%
  • the present invention relates to methods for reliably producing high strength 201
  • T201LN alloy Laboratory heats of T201LN alloy, which were significantly alloyed with nitrogen ( ⁇ 0.15%) to stabilize the austenite, were made with varying amounts of
  • elongation is decreased from about 55% to 48%.
  • measured hardness is increased from about
  • Cb content is increased from about 0.003% to about 0.210%).
  • an object of the present invention is to reliably increase the strength of the T201LN alloy so that it may exceed the mechanical requirements of material specified for
  • the present invention is directed to an austenitic stainless
  • invention also is directed to a method for providing a high strength 201 series stainless steel wherein the method includes preparing a heat of a 201 series stainless steel and maintaining
  • FIG. 1 shows ferrite maps made on V.” thick slices, taken from the bottom of the
  • FIG. 2 is a schematic illustration of the tensile and subsize Charpy specimens which
  • FIG. 3 is a plot of the yield strength (0.2%) offset), obtained from tensile specimens of the laboratory melted material of T201LN alloy, as a function of Cb;
  • FIG. 4 is a plot of the ultimate strength, obtained from tensile specimens of the
  • FIG. 5 is a plot of the ferrite content, as measured with the Magne-Gage, of the as-
  • FIG. 6 is a plot of the magnetic response as measured with the Magne-Gage on the
  • FIG. 7 is a plot of the % elongation, obtained from tensile specimens of the laboratory melted material of T201 LN alloy, as a function of Cb;
  • FIG. 8 is a plot of the hardness, obtained from tensile specimens of the laboratory
  • FIG. 9 is a plot of the grain size as a function of Cb obtained by metallographic
  • FIG. 10 is a plot of the impact energies as a function of Cb content for the testing of
  • FIG. 11 is a plot of the percent shear as a function of Cb content for the testing of
  • FIG. 12 is a plot of the lateral expansion as a function of Cb content for the testing of subsize Charpy samples ( ⁇ 0.180" thick) at -320, -50 and 70°F. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • the initial testing involved providing eleven groups of plates from the four heats as
  • the pressure vessel code requires a minimum of 15 mils lateral expansion after welding.
  • Heat 2C153, yield strength was 46,600 psi).
  • the fourth heat (Heat 2C078) as shown has acceptable strength, which appears to result from the .05% Cb addition, as is discussed later. Finer grain size also results from the
  • Heat 2C078 shows considerably higher yield and tensile strength than the other heats
  • composition for higher tensile strength would be of value.
  • Cb is sufficient to enhance the strength mechanical properties of this alloy without significantly degrading any of the other mechanical properties.
  • Table 1 contains the chemistries of the three
  • grain size of each sample was estimated per ASTM E 112 using the comparison procedure with the following two exceptions. The first is that the photomicrographs were taken at a
  • Table 2 contains the results which were obtained on or from the testing of the tensile
  • Table 3 contains the results obtained from testing of the Charpy specimens.
  • this material had the highest ferrite level (-2.5%) as measured on the tensile blanks, before testing.
  • Figure 5 is a plot of the ferrite content measured on the tensile blanks before testing.
  • the magnetic response (FN) was also measured along the shaft of the tensile
  • Cb is a strong stabilizer (i.e., retards the formation chromium
  • Rb and grain size is decreased from ASTM 6.5 to ASTM 10 as Cb content is increased from 0.003% to 0.210%.
  • the impact energy is increased as Cb content is increased up to about .10%) at the three temperatures tested.
  • Ductility remains relatively high at -50 and 70°F. At above about .10% Cb. a decrease, but

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
PCT/US1998/027602 1997-12-23 1998-12-23 Austenitic stainless steel including columbium Ceased WO1999032682A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AU20954/99A AU2095499A (en) 1997-12-23 1998-12-23 Austenitic stainless steel including columbium
KR1020007007028A KR100618715B1 (ko) 1997-12-23 1998-12-23 콜롬븀 함유 오스테나이트 스텐레스강 및 고강도 콜롬븀 함유 오스테나이트 스텐레스강 제조방법
JP2000525595A JP2001527156A (ja) 1997-12-23 1998-12-23 コロンビウムを含むオーステナイト系ステンレス鋼
EP98965499A EP1055011A1 (en) 1997-12-23 1998-12-23 Austenitic stainless steel including columbium
HK01102506.2A HK1032078B (en) 1997-12-23 1998-12-23 Austenitic stainless steel including columbium
BR9814425-1A BR9814425A (pt) 1997-12-23 1998-12-23 Aço inoxidável austenìtico incluindo colúmbio
CA2316332A CA2316332C (en) 1997-12-23 1998-12-23 Austenitic stainless steel including columbium

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US6854197P 1997-12-23 1997-12-23
US60/068,541 1997-12-23

Publications (1)

Publication Number Publication Date
WO1999032682A1 true WO1999032682A1 (en) 1999-07-01

Family

ID=22083224

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/027602 Ceased WO1999032682A1 (en) 1997-12-23 1998-12-23 Austenitic stainless steel including columbium

Country Status (8)

Country Link
EP (1) EP1055011A1 (https=)
JP (1) JP2001527156A (https=)
KR (1) KR100618715B1 (https=)
CN (1) CN1110577C (https=)
AU (1) AU2095499A (https=)
BR (1) BR9814425A (https=)
CA (1) CA2316332C (https=)
WO (1) WO1999032682A1 (https=)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1091006A1 (en) * 1999-10-04 2001-04-11 Hitachi Metals, Ltd. Strain-induced type martensitic steel having high hardness and high fatigue strength
WO2009082498A1 (en) * 2007-12-20 2009-07-02 Ati Properties, Inc. Austenitic stainless steel low in nickel containing stabilizing elements
WO2011053460A1 (en) * 2009-11-02 2011-05-05 Ati Properties, Inc. Lean austenitic stainless steel
AU2008330048B2 (en) * 2007-11-29 2012-11-08 Ati Properties Llc Lean austenitic stainless steel
US8877121B2 (en) 2007-12-20 2014-11-04 Ati Properties, Inc. Corrosion resistant lean austenitic stainless steel
US20150329947A1 (en) * 2012-12-19 2015-11-19 Centro Sviluppo Materiali S.P.A. Austenitic twip stainless steel, its production and use
IT202200018135A1 (it) * 2022-09-05 2024-03-05 Gas And Heat S P A Acciaio per il trasporto e lo stoccaggio di ammoniaca liquida

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7462439B2 (ja) * 2020-03-12 2024-04-05 日鉄ステンレス株式会社 オーステナイト系ステンレス鋼およびｎの上限値の算出方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5763666A (en) * 1981-08-12 1982-04-17 Nisshin Steel Co Ltd Warm water container with high yield strength and corrosion resistance
US4568387A (en) * 1984-07-03 1986-02-04 Allegheny Ludlum Steel Corporation Austenitic stainless steel for low temperature service
JPS63134627A (ja) * 1986-11-22 1988-06-07 Kobe Steel Ltd Ｎｂ↓３Ｓｎ生成熱処理後の極低温特性に優れたオ−ステナイト系ステンレス鋼の製造方法
JPH05295486A (ja) * 1992-04-16 1993-11-09 Nippon Steel Corp 高強度・非磁性ステンレス鋼線材
EP0573335A1 (fr) * 1992-06-04 1993-12-08 Aubert et Duval S.A. Composition d'acier inoxydable pour pièces utilisées en ultravide et à basse température
JPH07233444A (ja) * 1994-02-22 1995-09-05 Nippon Steel Corp 高冷間加工性・非磁性ステンレス鋼
JPH07314178A (ja) * 1994-05-27 1995-12-05 Nippon Steel Corp オーステナイト系ステンレス鋼用ガスシールド溶接ワイヤ

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5763666A (en) * 1981-08-12 1982-04-17 Nisshin Steel Co Ltd Warm water container with high yield strength and corrosion resistance
US4568387A (en) * 1984-07-03 1986-02-04 Allegheny Ludlum Steel Corporation Austenitic stainless steel for low temperature service
JPS63134627A (ja) * 1986-11-22 1988-06-07 Kobe Steel Ltd Ｎｂ↓３Ｓｎ生成熱処理後の極低温特性に優れたオ−ステナイト系ステンレス鋼の製造方法
JPH05295486A (ja) * 1992-04-16 1993-11-09 Nippon Steel Corp 高強度・非磁性ステンレス鋼線材
EP0573335A1 (fr) * 1992-06-04 1993-12-08 Aubert et Duval S.A. Composition d'acier inoxydable pour pièces utilisées en ultravide et à basse température
JPH07233444A (ja) * 1994-02-22 1995-09-05 Nippon Steel Corp 高冷間加工性・非磁性ステンレス鋼
JPH07314178A (ja) * 1994-05-27 1995-12-05 Nippon Steel Corp オーステナイト系ステンレス鋼用ガスシールド溶接ワイヤ

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 139 (C - 116) 28 July 1982 (1982-07-28) *
PATENT ABSTRACTS OF JAPAN vol. 012, no. 387 (C - 536) 14 October 1988 (1988-10-14) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 097 (C - 1167) 17 February 1994 (1994-02-17) *
PATENT ABSTRACTS OF JAPAN vol. 096, no. 001 31 January 1996 (1996-01-31) *
PATENT ABSTRACTS OF JAPAN vol. 096, no. 004 30 April 1996 (1996-04-30) *

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6562153B1 (en) 1999-10-04 2003-05-13 Hitachi Metals, Ltd. Strain-induced type martensitic steel having high hardness and having high fatigue strength
EP1091006A1 (en) * 1999-10-04 2001-04-11 Hitachi Metals, Ltd. Strain-induced type martensitic steel having high hardness and high fatigue strength
US8858872B2 (en) 2007-11-29 2014-10-14 Ati Properties, Inc. Lean austenitic stainless steel
US10370748B2 (en) 2007-11-29 2019-08-06 Ati Properties Llc Lean austenitic stainless steel
US9617628B2 (en) 2007-11-29 2017-04-11 Ati Properties Llc Lean austenitic stainless steel
AU2008330048B2 (en) * 2007-11-29 2012-11-08 Ati Properties Llc Lean austenitic stainless steel
JP2015221945A (ja) * 2007-11-29 2015-12-10 エイティーアイ・プロパティーズ・インコーポレーテッド オーステナイト系のリーンステンレス鋼
US9133538B2 (en) 2007-12-20 2015-09-15 Ati Properties, Inc. Lean austenitic stainless steel containing stabilizing elements
US9624564B2 (en) 2007-12-20 2017-04-18 Ati Properties Llc Corrosion resistant lean austenitic stainless steel
WO2009082498A1 (en) * 2007-12-20 2009-07-02 Ati Properties, Inc. Austenitic stainless steel low in nickel containing stabilizing elements
KR101535695B1 (ko) * 2007-12-20 2015-07-09 에이티아이 프로퍼티즈, 인코퍼레이티드 안정화 원소를 함유하고 저 함량 니켈의 오스테나이트계 스테인리스 강
US9121089B2 (en) 2007-12-20 2015-09-01 Ati Properties, Inc. Lean austenitic stainless steel
AU2008341063C1 (en) * 2007-12-20 2014-05-22 Ati Properties Llc Austenitic stainless steel low in nickel containing stabilizing elements
US10323308B2 (en) 2007-12-20 2019-06-18 Ati Properties Llc Corrosion resistant lean austenitic stainless steel
AU2008341063B2 (en) * 2007-12-20 2013-07-04 Ati Properties Llc Austenitic stainless steel low in nickel containing stabilizing elements
US9873932B2 (en) 2007-12-20 2018-01-23 Ati Properties Llc Lean austenitic stainless steel containing stabilizing elements
US8877121B2 (en) 2007-12-20 2014-11-04 Ati Properties, Inc. Corrosion resistant lean austenitic stainless steel
US9822435B2 (en) 2007-12-20 2017-11-21 Ati Properties Llc Lean austenitic stainless steel
WO2011053460A1 (en) * 2009-11-02 2011-05-05 Ati Properties, Inc. Lean austenitic stainless steel
RU2547064C2 (ru) * 2009-11-02 2015-04-10 ЭйТиАй ПРОПЕРТИЗ, ИНК. Малолегированная аустенитная нержавеющая сталь
US10066280B2 (en) * 2012-12-19 2018-09-04 Centro Sviluppo Materiali S.P.A. Austenitic TWIP stainless steel, its production and use
US20150329947A1 (en) * 2012-12-19 2015-11-19 Centro Sviluppo Materiali S.P.A. Austenitic twip stainless steel, its production and use
IT202200018135A1 (it) * 2022-09-05 2024-03-05 Gas And Heat S P A Acciaio per il trasporto e lo stoccaggio di ammoniaca liquida
WO2024052805A1 (en) * 2022-09-05 2024-03-14 Gas and Heat S.p.A. Steel for the transport and storage of liquid ammonia

Also Published As

Publication number Publication date
KR100618715B1 (ko) 2006-08-31
CN1285005A (zh) 2001-02-21
HK1032078A1 (en) 2001-07-06
AU2095499A (en) 1999-07-12
EP1055011A1 (en) 2000-11-29
BR9814425A (pt) 2002-07-23
CA2316332C (en) 2013-02-19
CN1110577C (zh) 2003-06-04
CA2316332A1 (en) 1999-07-01
JP2001527156A (ja) 2001-12-25
KR20010033526A (ko) 2001-04-25

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