EP4265784A4 - MARTENSITIC STAINLESS STEEL HAVING IMPROVED STRENGTH AND CORROSION RESISTANCE, AND METHOD FOR MANUFACTURING SAME - Google Patents

MARTENSITIC STAINLESS STEEL HAVING IMPROVED STRENGTH AND CORROSION RESISTANCE, AND METHOD FOR MANUFACTURING SAME Download PDF

Info

Publication number
EP4265784A4
EP4265784A4 EP21911281.0A EP21911281A EP4265784A4 EP 4265784 A4 EP4265784 A4 EP 4265784A4 EP 21911281 A EP21911281 A EP 21911281A EP 4265784 A4 EP4265784 A4 EP 4265784A4
Authority
EP
European Patent Office
Prior art keywords
stainless steel
corrosion resistance
manufacturing same
martensitic stainless
improved strength
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.)
Pending
Application number
EP21911281.0A
Other languages
German (de)
French (fr)
Other versions
EP4265784A1 (en
Inventor
Byoung-Jun Song
Youngjin Kwon
Gyujin JO
Nayeon CHU
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.)
Posco Holdings Inc
Original Assignee
Posco Co Ltd
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 Posco Co Ltd filed Critical Posco Co Ltd
Publication of EP4265784A1 publication Critical patent/EP4265784A1/en
Publication of EP4265784A4 publication Critical patent/EP4265784A4/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/22—Martempering
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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
    • C21D6/02—Hardening by precipitation
    • 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
    • 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0268—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment between cold rolling steps
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • 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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/44—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
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/004—Dispersions; Precipitations
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite

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 Sheet Steel (AREA)
  • Heat Treatment Of Steel (AREA)
EP21911281.0A 2020-12-21 2021-11-29 MARTENSITIC STAINLESS STEEL HAVING IMPROVED STRENGTH AND CORROSION RESISTANCE, AND METHOD FOR MANUFACTURING SAME Pending EP4265784A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020200180359A KR20220089588A (en) 2020-12-21 2020-12-21 Martensitic stainless steel with improved strength and corrosion resistance, and its manufacturing method
PCT/KR2021/017715 WO2022139214A1 (en) 2020-12-21 2021-11-29 Martensitic stainless steel with improved strength and corrosion resistance, and manufacturing method therefor

Publications (2)

Publication Number Publication Date
EP4265784A1 EP4265784A1 (en) 2023-10-25
EP4265784A4 true EP4265784A4 (en) 2024-09-25

Family

ID=82158192

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21911281.0A Pending EP4265784A4 (en) 2020-12-21 2021-11-29 MARTENSITIC STAINLESS STEEL HAVING IMPROVED STRENGTH AND CORROSION RESISTANCE, AND METHOD FOR MANUFACTURING SAME

Country Status (6)

Country Link
US (1) US20240271240A1 (en)
EP (1) EP4265784A4 (en)
JP (1) JP7673202B2 (en)
KR (2) KR20220089588A (en)
CN (1) CN116745455A (en)
WO (1) WO2022139214A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115896591A (en) * 2022-10-28 2023-04-04 中国科学院金属研究所 A method for improving the corrosion resistance and comprehensive mechanical properties of low-carbon martensitic stainless steel
CN117363959A (en) * 2023-10-19 2024-01-09 甘肃酒钢集团宏兴钢铁股份有限公司 Smelting process method of vanadium iron alloyed martensitic stainless steel
WO2026024018A1 (en) * 2024-07-23 2026-01-29 주식회사 포스코 Martensitic stainless steel and method of manufacturing same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3031942A1 (en) * 2014-12-09 2016-06-15 voestalpine Precision Strip AB Stainless steel strip for flapper valves
CN107723616A (en) * 2017-10-23 2018-02-23 江苏延汉材料科技有限公司 A kind of martensitic stain less steel and its manufacture method
CN108300945A (en) * 2018-04-30 2018-07-20 江苏延汉材料科技有限公司 A kind of martensitic stain less steel and its manufacturing method of manufacture scalpel blade
CN108642408A (en) * 2018-07-10 2018-10-12 中国科学院金属研究所 A kind of high carbon and chromium martensitic stainless steel and preparation method thereof
WO2020245285A1 (en) * 2019-06-05 2020-12-10 Ab Sandvik Materials Technology A martensitic stainless alloy

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5939018A (en) * 1984-10-10 1999-08-17 Kawasaki Steel Corporation Martensitic stainless steels for seamless steel pipe
JP2968844B2 (en) * 1995-01-13 1999-11-02 日立金属株式会社 High hardness martensitic stainless steel with excellent pitting resistance
KR100210522B1 (en) * 1995-01-13 1999-07-15 다나카 히사노리 High hardness martensitic stainless steel with good pitting corrosion resistance
MY114984A (en) * 1995-01-13 2003-03-31 Hitachi Metals Ltd High hardness martensitic stainless steel with good pitting corrosion resistance
JPH1018001A (en) * 1996-07-01 1998-01-20 Hitachi Metals Ltd High hardness martensitic stainless steel excellent in pitting corrosion resistance
CN105934530B (en) * 2014-12-09 2017-08-08 奥钢联精密带钢公司 Stainless steel for flapper valves
JP6492869B2 (en) * 2015-03-30 2019-04-03 新日鐵住金株式会社 High-strength cold-rolled steel sheet with excellent weldability and workability and its manufacturing method
CN106086631B (en) * 2016-08-23 2018-05-01 钢铁研究总院 High nitrogen martensite stainless bearing steel of high-hardness, wearable and preparation method thereof
SE541151C2 (en) * 2017-10-05 2019-04-16 Uddeholms Ab Stainless steel
JP7267702B2 (en) 2018-09-27 2023-05-02 日鉄ステンレス株式会社 MARTENSITE STAINLESS STEEL BAR FOR HIGH HARDNESS AND HIGH CORROSION RESISTANCE WITH EXCELLENT COLD WORKABILITY AND METHOD FOR MANUFACTURING SAME
JP7404792B2 (en) 2018-12-04 2023-12-26 株式会社プロテリアル Martensitic stainless steel parts and their manufacturing method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3031942A1 (en) * 2014-12-09 2016-06-15 voestalpine Precision Strip AB Stainless steel strip for flapper valves
CN107723616A (en) * 2017-10-23 2018-02-23 江苏延汉材料科技有限公司 A kind of martensitic stain less steel and its manufacture method
CN108300945A (en) * 2018-04-30 2018-07-20 江苏延汉材料科技有限公司 A kind of martensitic stain less steel and its manufacturing method of manufacture scalpel blade
CN108642408A (en) * 2018-07-10 2018-10-12 中国科学院金属研究所 A kind of high carbon and chromium martensitic stainless steel and preparation method thereof
WO2020245285A1 (en) * 2019-06-05 2020-12-10 Ab Sandvik Materials Technology A martensitic stainless alloy

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2022139214A1 *

Also Published As

Publication number Publication date
KR20230123913A (en) 2023-08-24
JP7673202B2 (en) 2025-05-08
JP2024500865A (en) 2024-01-10
CN116745455A (en) 2023-09-12
KR102805613B1 (en) 2025-05-13
WO2022139214A1 (en) 2022-06-30
US20240271240A1 (en) 2024-08-15
EP4265784A1 (en) 2023-10-25
KR20220089588A (en) 2022-06-28

Similar Documents

Publication Publication Date Title
EP4265784A4 (en) MARTENSITIC STAINLESS STEEL HAVING IMPROVED STRENGTH AND CORROSION RESISTANCE, AND METHOD FOR MANUFACTURING SAME
EP3901318A4 (en) HIGH STRENGTH GALVANIZED STEEL SHEET HAVING EXCELLENT ELECTRICAL RESISTANCE POINT WELDABILITY AND METHOD OF MANUFACTURING THEREOF
EP4166685A4 (en) ULTRA-HIGH STRENGTH STEEL WITH EXCELLENT PLASTICITY AND MANUFACTURING METHOD THEREFOR
EP3901308A4 (en) HIGH STRENGTH STEEL SHEET HAVING EXCELLENT DUCTILITY AND WORKABILITY, AND ITS MANUFACTURING PROCESS
EP4265361A4 (en) WELDED STRUCTURAL ELEMENT HAVING EXCELLENT CRACK RESISTANCE AND METHOD FOR MANUFACTURING SAME
EP3733918A4 (en) ZINC ALLOY PLATED STEEL MATERIAL HAVING EXCELLENT COROSION RESISTANCE AFTER TREATMENT AND ITS MANUFACTURING PROCESS
EP3875623A4 (en) HIGH STRENGTH STEEL SHEET AND ITS MANUFACTURING PROCESS
EP3896184A4 (en) HIGH STRENGTH STEEL SHEET HAVING EXCELLENT MOLDABILITY AND IMPACT RESISTANCE, AND METHOD FOR MANUFACTURING HIGH STRENGTH STEEL SHEET HAVING EXCELLENT MOLDABILITY AND IMPACT RESISTANCE
EP3561111A4 (en) THICK STEEL SHEET HAVING EXCELLENT CRYOGENIC IMPACT RESISTANCE AND MANUFACTURING METHOD THEREOF
EP3865600A4 (en) HIGH STRENGTH NON-MAGNETIC AUSTENITIC STAINLESS STEEL AND METHOD OF MANUFACTURING THEREOF
EP4079898A4 (en) HIGH STRENGTH STEEL SHEET HAVING EXCELLENT WORKABILITY AND PROCESSING METHOD THEREOF
EP3358029A4 (en) HIGH STRENGTH STAINLESS STEEL SHEET HAVING EXCELLENT FATIGUE CHARACTERISTICS AND METHOD FOR MANUFACTURING THE SAME
EP4265764A4 (en) HIGH-STRENGTH STEEL SHEET HAVING EXCELLENT SHAPABILITY, AND METHOD FOR MANUFACTURING SAME
EP4361303A4 (en) HIGH-STRENGTH STEEL SHEET, HIGH-STRENGTH PLATED STEEL SHEET, MANUFACTURING METHOD THEREOF, AND MEMBER
EP3828301A4 (en) HIGH STRENGTH STEEL SHEET WITH EXCELLENT PROPERTY OF IMPACT RESISTANCE AND ITS MANUFACTURING PROCESS
EP4119697A4 (en) FERRITIC STAINLESS STEEL AND ITS MANUFACTURING METHOD
EP4079914A4 (en) NON-HEAT TREATED ROD HAVING EXCELLENT DRAWABILITY AND EXCELLENT IMPACT RESISTANCE, AND METHOD OF MANUFACTURING THEREOF
EP4265367A4 (en) WELDED ELEMENT HAVING EXCELLENT RESISTANCE TO WELDED PART FATIGUE, AND METHOD FOR MANUFACTURING SAME
EP4079894A4 (en) HIGH STRENGTH STEEL SHEET HAVING EXCELLENT WORKABILITY AND PROCESSING METHOD THEREOF
EP4071262A4 (en) THICK COMPOSITE STEEL WITH EXCELLENT DURABILITY AND ITS MANUFACTURING PROCESS
EP3498877A4 (en) HIGH STRENGTH STEEL SHEET HAVING EXCELLENT FORMING CAPABILITY AND MANUFACTURING METHOD THEREOF
EP3889302A4 (en) CHROMIUM-MOLYBDENUM STEEL SHEET HAVING EXCELLENT CREEP RESISTANCE AND METHOD OF MANUFACTURING THEREOF
EP3978643A4 (en) AUSTENITIC STAINLESS STEEL WITH IMPROVED STRENGTH AND METHOD OF MANUFACTURING THEREOF
EP3904565A4 (en) NI-PLATED STEEL SHEET WITH EXCELLENT CORROSION RESISTANCE POST-TREATMENT AND ITS PRODUCTION PROCESS
EP4361305A4 (en) AUSTENITIC STAINLESS STEEL AND ITS MANUFACTURING PROCESS

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20230620

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
REG Reference to a national code

Ref country code: DE

Ref legal event code: R079

Free format text: PREVIOUS MAIN CLASS: C22C0038460000

Ipc: C22C0038440000

A4 Supplementary search report drawn up and despatched

Effective date: 20240823

RIC1 Information provided on ipc code assigned before grant

Ipc: C21D 1/26 20060101ALI20240819BHEP

Ipc: C21D 1/25 20060101ALI20240819BHEP

Ipc: C21D 1/22 20060101ALI20240819BHEP

Ipc: C21D 1/18 20060101ALI20240819BHEP

Ipc: C21D 6/02 20060101ALI20240819BHEP

Ipc: C21D 6/00 20060101ALI20240819BHEP

Ipc: C21D 8/02 20060101ALI20240819BHEP

Ipc: C21D 9/46 20060101ALI20240819BHEP

Ipc: C22C 38/00 20060101ALI20240819BHEP

Ipc: C22C 38/04 20060101ALI20240819BHEP

Ipc: C22C 38/02 20060101ALI20240819BHEP

Ipc: C22C 38/42 20060101ALI20240819BHEP

Ipc: C22C 38/46 20060101ALI20240819BHEP

Ipc: C22C 38/44 20060101AFI20240819BHEP