EP 3561115 A1 20191030 - THICK STEEL PLATE HAVING EXCELLENT LOW-TEMPERATURE IMPACT TOUGHNESS AND CTOD CHARACTERISTIC AND MANUFACTURING METHOD THEREFOR
Title (en)
THICK STEEL PLATE HAVING EXCELLENT LOW-TEMPERATURE IMPACT TOUGHNESS AND CTOD CHARACTERISTIC AND MANUFACTURING METHOD THEREFOR
Title (de)
DICKWANDIGE STAHLPLATTE MIT HERVORRAGENDER TIEFTEMPERATUR-SCHLAGZÄHIGKEIT UND CTOD-EIGENSCHAFT UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
TÔLE D'ACIER ÉPAISSE PRÉSENTANT D'EXCELLENTES CARACTÉRISTIQUES DE RÉSISTANCE AUX CHOCS À BASSE TEMPÉRATURE ET D'ÉCARTEMENT DE FISSURE, ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- KR 20160178561 A 20161223
- KR 2017015320 W 20171222
Abstract (en)
An aspect of the present invention relates to a thick steel plate having excellent low-temperature impact toughness and CTOD characteristics, the thick steel plate comprising, by weight %: 0.02-0.06% of C, 0.005-0.08% of Si, 1.0-2.0% of Mn, 0.01% or less of P, 0.003% or less of S, 0.001-0.01% of Al, 0.5-2.0% of Ni, 0.001-0.02% of Ti, 0.005-0.03% of Nb, 0.05-0.4% of Cu, 0.002-0.006% of N, and a balance of Fe and inevitable impurities with the proviso of satisfying the following equations, wherein the thick steel plate has a microstructure including ferrite in an amount of 95 area % or greater and a sum of MA and cementite in an amount of 2 area % or less : Equation 1: 3.0≤Mn+2Ni≤4.3 and Equation 2: 0.05≤C+Si+10Al≤0.25 (wherein element symbols each represent contents thereof by weight %) .
IPC 8 full level
C22C 38/04 (2006.01); C21D 1/18 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01)
CPC (source: EP KR)
C21D 1/18 (2013.01 - KR); C21D 6/001 (2013.01 - EP); C21D 6/005 (2013.01 - EP); C21D 6/008 (2013.01 - EP); C21D 8/0205 (2013.01 - EP); C21D 8/021 (2013.01 - KR); C21D 8/0226 (2013.01 - EP); C21D 8/0263 (2013.01 - EP); C21D 9/46 (2013.01 - EP KR); C22C 38/001 (2013.01 - EP); C22C 38/002 (2013.01 - EP KR); C22C 38/02 (2013.01 - EP KR); C22C 38/04 (2013.01 - EP KR); C22C 38/06 (2013.01 - EP KR); C22C 38/08 (2013.01 - EP KR); C22C 38/12 (2013.01 - EP KR); C22C 38/14 (2013.01 - EP KR); C22C 38/16 (2013.01 - EP); C21D 2211/001 (2013.01 - EP); C21D 2211/005 (2013.01 - EP KR); C21D 2211/008 (2013.01 - EP)
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 3561115 A1 20191030; EP 3561115 A4 20191127; EP 3561115 B1 20220713; CN 110100026 A 20190806; CN 110100026 B 20211008; JP 2020509206 A 20200326; JP 6824415 B2 20210203; KR 101899694 B1 20180917; KR 20180074470 A 20180703; WO 2018117727 A1 20180628
DOCDB simple family (application)
EP 17885144 A 20171222; CN 201780078777 A 20171222; JP 2019533569 A 20171222; KR 20160178561 A 20161223; KR 2017015320 W 20171222