EP 3878996 A1 20210915 - HIGH STRENGTH STEEL PLATE FOR STRUCTURE WITH GOOD SEAWATER CORROSION RESISTANT PROPERTY AND METHOD OF MANUFACTURING SAME
Title (en)
HIGH STRENGTH STEEL PLATE FOR STRUCTURE WITH GOOD SEAWATER CORROSION RESISTANT PROPERTY AND METHOD OF MANUFACTURING SAME
Title (de)
HOCHFESTE STAHLPLATTE FÜR STRUKTUR MIT GUTER KORROSIONSBESTÄNDIGKEIT GEGEN MEERWASSER UND VERFAHREN ZU IHRER HERSTELLUNG
Title (fr)
PLAQUE D'ACIER À HAUTE RÉSISTANCE POUR STRUCTURE POSSÉDANT UNE BONNE PROPRIÉTÉ DE RÉSISTANCE À LA CORROSION PAR L'EAU DE MER ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- KR 20180136846 A 20181108
- KR 2019015124 W 20191108
Abstract (en)
The present invention provides a high strength steel plate for a structure and a method of manufacturing same, wherein the high strength steel plate for a structure comprises, by weight%, 0.03% (inclusive) to 0.1% (exclusive) of C, 0.1% (inclusive) to 0.8% (exclusive) of Si, 0.3% (inclusive) to 1.5% (exclusive) of Mn, 0.5% (inclusive) to 1.5% (exclusive) of Cr, 0.1% (inclusive) to 0.5% (exclusive) of Cu, 0.01% (inclusive) to 0.08% (exclusive) of Al, 0.01% (inclusive) to 0.1% (exclusive) of Ti, 0.05% (inclusive) to 0.1% (exclusive) of Ni, 0.002% (inclusive) to 0.07% (exclusive) of Nb, 0.03% or less of P, 0.02% or less of S, and the balance of Fe and unavoidable impurities, and has a microstructure comprising, by area fraction, 20% or more of bainite, less than 80% of polygonal ferrite and acicular ferrite in total, and less than 10% of pearlite and MA as the other phases.
IPC 8 full level
C22C 38/42 (2006.01); C21D 8/02 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01)
CPC (source: EP KR US)
C21D 1/02 (2013.01 - EP); C21D 1/18 (2013.01 - EP); C21D 6/00 (2013.01 - EP); C21D 6/004 (2013.01 - EP US); C21D 6/005 (2013.01 - EP US); C21D 6/008 (2013.01 - EP US); C21D 8/02 (2013.01 - EP); C21D 8/0205 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP KR US); C21D 8/0263 (2013.01 - KR US); C21D 9/46 (2013.01 - EP US); C22C 38/00 (2013.01 - EP); C22C 38/002 (2013.01 - US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP KR US); C22C 38/42 (2013.01 - EP KR US); C22C 38/48 (2013.01 - EP KR US); C22C 38/50 (2013.01 - EP KR US); C21D 2211/002 (2013.01 - EP KR US); C21D 2211/005 (2013.01 - KR US); C21D 2211/009 (2013.01 - KR)
Designated contracting state (EPC)
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3878996 A1 20210915; EP 3878996 A4 20220105; CN 112969809 A 20210615; CN 112969809 B 20231215; JP 2022506661 A 20220117; JP 7332692 B2 20230823; KR 102142774 B1 20200807; KR 20200053342 A 20200518; US 2021388458 A1 20211216; WO 2020096398 A1 20200514
DOCDB simple family (application)
EP 19883204 A 20191108; CN 201980073445 A 20191108; JP 2021524195 A 20191108; KR 20180136846 A 20181108; KR 2019015124 W 20191108; US 201917291823 A 20191108