EP3395996A4 - Acier inoxydable duplex pauvre ayant une résistance à la corrosion et une usinabilité améliorées et procédé de fabrication s'y rapportant - Google Patents

Acier inoxydable duplex pauvre ayant une résistance à la corrosion et une usinabilité améliorées et procédé de fabrication s'y rapportant Download PDF

Info

Publication number
EP3395996A4
EP3395996A4 EP16879118.4A EP16879118A EP3395996A4 EP 3395996 A4 EP3395996 A4 EP 3395996A4 EP 16879118 A EP16879118 A EP 16879118A EP 3395996 A4 EP3395996 A4 EP 3395996A4
Authority
EP
European Patent Office
Prior art keywords
machinability
manufacturing
stainless steel
corrosion resistance
method therefor
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
EP16879118.4A
Other languages
German (de)
English (en)
Other versions
EP3395996A1 (fr
Inventor
Jeom Yong Choi
Hak Kim
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 EP3395996A1 publication Critical patent/EP3395996A1/fr
Publication of EP3395996A4 publication Critical patent/EP3395996A4/fr
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
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • 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
    • 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
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • 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
    • 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
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • 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
    • 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
    • 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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • 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
    • C21D2211/001—Austenite
    • 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
EP16879118.4A 2015-12-23 2016-08-12 Acier inoxydable duplex pauvre ayant une résistance à la corrosion et une usinabilité améliorées et procédé de fabrication s'y rapportant Pending EP3395996A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020150184697A KR101746404B1 (ko) 2015-12-23 2015-12-23 내식성 및 가공성이 향상된 린 듀플렉스 스테인리스강 및 이의 제조 방법
PCT/KR2016/008881 WO2017111250A1 (fr) 2015-12-23 2016-08-12 Acier inoxydable duplex pauvre ayant une résistance à la corrosion et une usinabilité améliorées et procédé de fabrication s'y rapportant

Publications (2)

Publication Number Publication Date
EP3395996A1 EP3395996A1 (fr) 2018-10-31
EP3395996A4 true EP3395996A4 (fr) 2019-03-06

Family

ID=59090649

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16879118.4A Pending EP3395996A4 (fr) 2015-12-23 2016-08-12 Acier inoxydable duplex pauvre ayant une résistance à la corrosion et une usinabilité améliorées et procédé de fabrication s'y rapportant

Country Status (6)

Country Link
US (1) US20190010573A1 (fr)
EP (1) EP3395996A4 (fr)
JP (1) JP6722286B2 (fr)
KR (1) KR101746404B1 (fr)
CN (1) CN108368592A (fr)
WO (1) WO2017111250A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102326323B1 (ko) * 2019-12-19 2021-11-12 주식회사 포스코 내마모성과 복합내식성이 우수한 강판 및 그 제조방법
CN113969332B (zh) * 2021-10-22 2023-01-17 昆明理工大学 一种高Mn超低Ni双相不锈钢及其高耐蚀性焊接热影响区热加工方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2251449A1 (fr) * 2008-02-05 2010-11-17 Nippon Steel & Sumikin Stainless Steel Corporation Tôle d'acier inoxydable de ferrite-austénite présentant d'excellentes propriétés de résistance au striage et d'aptitude au façonnage et son procédé de fabrication
WO2013081422A1 (fr) * 2011-11-30 2013-06-06 (주)포스코 Acier inoxydable duplex pauvre et son procédé de fabrication
US20140219856A1 (en) * 2011-09-07 2014-08-07 Outokumpu Oyj Duplex stainless steel
KR20150073381A (ko) * 2013-12-23 2015-07-01 주식회사 포스코 내응력부식성이 우수한 2상 스테인리스강

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2765243B1 (fr) 1997-06-30 1999-07-30 Usinor Acier inoxydable austenoferritique a tres bas nickel et presentant un fort allongement en traction
KR20150024952A (ko) * 2008-03-26 2015-03-09 닛폰 스틸 앤드 스미킨 스테인레스 스틸 코포레이션 용접 열 영향부의 내식성과 인성이 양호한 저합금 2상 스테인리스강
JP5335503B2 (ja) * 2009-03-19 2013-11-06 新日鐵住金ステンレス株式会社 プレス成形性に優れた二相ステンレス鋼板
KR101504401B1 (ko) * 2012-11-30 2015-03-19 주식회사 포스코 고연성 린 듀플렉스 스테인리스강 및 그 제조방법
CA2932068C (fr) * 2013-12-13 2023-01-03 Outokumpu Oyj Procede pour la production d'acier inoxydable duplex a haute resistance

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2251449A1 (fr) * 2008-02-05 2010-11-17 Nippon Steel & Sumikin Stainless Steel Corporation Tôle d'acier inoxydable de ferrite-austénite présentant d'excellentes propriétés de résistance au striage et d'aptitude au façonnage et son procédé de fabrication
US20140219856A1 (en) * 2011-09-07 2014-08-07 Outokumpu Oyj Duplex stainless steel
WO2013081422A1 (fr) * 2011-11-30 2013-06-06 (주)포스코 Acier inoxydable duplex pauvre et son procédé de fabrication
KR20150073381A (ko) * 2013-12-23 2015-07-01 주식회사 포스코 내응력부식성이 우수한 2상 스테인리스강

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2017111250A1 *

Also Published As

Publication number Publication date
US20190010573A1 (en) 2019-01-10
KR101746404B1 (ko) 2017-06-14
JP6722286B2 (ja) 2020-07-15
EP3395996A1 (fr) 2018-10-31
JP2019501286A (ja) 2019-01-17
WO2017111250A1 (fr) 2017-06-29
CN108368592A (zh) 2018-08-03

Similar Documents

Publication Publication Date Title
EP3214194A4 (fr) Acier inoxydable austénitique et son procédé de fabrication
EP3282031A4 (fr) Élément de tôle d'acier traité thermiquement et son procédé de production
EP3399062A4 (fr) Tôle en acier à haute résistance, tôle en acier galvanisé à haute résistance, et procédé de fabrication associé
HK1254792A1 (zh) 疲勞特性優異的高强度不銹鋼板及其製造方法
EP3282030A4 (fr) Élément de tôle d'acier traité thermiquement et son procédé de production
EP3312299A4 (fr) Tôle d'acier et procédé de fabrication
EP3269895B8 (fr) Element de toiture metallique, et structure de couverture ainsi que procede de couverture mettant en oeuvre celui-ci
EP3508596A4 (fr) Acier inoxydable duplex et procédé pour sa fabrication
EP3508602A4 (fr) Acier inoxydable austénitique
EP3305931A4 (fr) Tôle d'acier et son procédé de fabrication
EP3358030A4 (fr) Acier inoxydable austénitique et son procédé de production
EP3074544B8 (fr) Acier inoxydable martensitique, pièce réalisée en cet acier et son procédé de fabrication
EP3427852A4 (fr) Procédé de fabrication de tuyau en acier de différentes épaisseurs et tuyau en acier de différentes épaisseurs
EP3278888A4 (fr) Feuille d'acier inoxydable austénitique, élément de couvercle et procédé de production de feuille d'acier inoxydable austénitique
EP3178958A4 (fr) Acier inoxydable austénitique
EP3034642A4 (fr) Acier inoxydable martensitique ayant une excellente résistance à l'usure et une excellente résistance à la corrosion, et procédé pour sa production
EP3339464A4 (fr) Tôle d'acier à dureté élevée et son procédé de fabrication
AP2016009298A0 (en) Corrosion resistant duplex steel alloy, objects made thereof, and method of making the alloy
EP3467132A4 (fr) Acier inoxydable duplex et procédé de fabrication d'acier inoxydable duplex
EP3339460A4 (fr) MATÉRIAU D'ACIER INOXYDABLE À BASE DE FERRITE À TENEUR ÉLEVÉE EN Al DOTÉ DE PROPRIÉTÉS D'AMORTISSEMENT, ET PROCÉDÉ DE FABRICATION DE CELUI-CI
EP3287536A4 (fr) Acier inoxydable martensitique
EP3480330A4 (fr) Acier inoxydable austénitique
EP3339459A4 (fr) Matériau d'acier inoxydable à base de ferrite doté de propriétés d'amortissement, et procédé de fabrication de celui-ci
EP3239358A4 (fr) Tôle d'acier plaquée présentant une excellente propriété d'adhésion et son procédé de fabrication
EP3382051A4 (fr) Acier, constituant d'acier cémenté, et procédé de production de constituant d'acier cémenté

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: 20180604

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

AX Request for extension of the european patent

Extension state: BA ME

A4 Supplementary search report drawn up and despatched

Effective date: 20190205

RIC1 Information provided on ipc code assigned before grant

Ipc: C21D 8/02 20060101ALI20190130BHEP

Ipc: C21D 9/46 20060101ALI20190130BHEP

Ipc: C22C 38/60 20060101ALI20190130BHEP

Ipc: C22C 38/46 20060101ALI20190130BHEP

Ipc: C22C 38/00 20060101ALI20190130BHEP

Ipc: C21D 6/00 20060101ALI20190130BHEP

Ipc: C22C 38/02 20060101ALI20190130BHEP

Ipc: C22C 38/42 20060101ALI20190130BHEP

Ipc: C22C 38/44 20060101ALI20190130BHEP

Ipc: C22C 38/58 20060101AFI20190130BHEP

Ipc: C22C 38/50 20060101ALI20190130BHEP

Ipc: C22C 38/48 20060101ALI20190130BHEP

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20210311

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

Free format text: STATUS: EXAMINATION IS IN PROGRESS

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: POSCO HOLDINGS INC.

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: POSCO CO., LTD