EP 3696287 A1 20200819 - THICK STEEL PLATE HAVING EXCELLENT LOW-TEMPERATURE STRAIN AGING IMPACT PROPERTY AND MANUFACTURING METHOD THEREFOR
Title (en)
THICK STEEL PLATE HAVING EXCELLENT LOW-TEMPERATURE STRAIN AGING IMPACT PROPERTY AND MANUFACTURING METHOD THEREFOR
Title (de)
DICKWANDIGE STAHLPLATTE MIT AUSGEZEICHNETEN NIEDRIGTEMPERATUR-RECKALTERUNGSIMPAKTEIGENSCHAFTEN UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
TÔLE D'ACIER ÉPAISSE PRÉSENTANT D'EXCELLENTES PROPRIÉTÉS DE RÉSISTANCE AU VIEILLISSEMENT APRÈS CONTRAINTE À BASSE TEMPÉRATURE ET PROCÉDÉ DE FABRICATION CORRESPONDANT
Publication
Application
Priority
- KR 20170131605 A 20171011
- KR 2018011722 W 20181004
Abstract (en)
The present invention relates to a thick steel plate superior in low-temperature strain aging impact properties and a manufacturing method therefor and, more particularly, to a thick steel plate that is usable as a material in ship building, marine structures, and the like and which has excellent low-temperature strain aging impact properties and a method for manufacturing the same. An embodiment of the present invention provides a thick steel plate having excellent low-temperature strain aging impact properties, the steel plate comprising, by weight: 0.04-0.1% of C; 0.05-0.4% of Si; 1.0-2.0% of Mn; 0.01% or less of P; 0.003% or less of S; 0. 015-0.04% of Al; 0. 005-0.02% of Ti; 0.35% or less (0 exclusive) of Cu; 0.05-0.8% of Ni; 0.003-0.03% of Nb; 0.002-0.008% of N; 0.0002-0.0050% of Ca; 0.009% or less of Cr; 0.0009% or less of Mo; and a balance of Fe and other inevitable impurities, with the microstructure thereof including 95% by area or greater of ferrite 10 µm or less in average grain size, and a manufacturing method therefor.
IPC 8 full level
C21D 8/02 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP KR)
C21D 8/02 (2013.01 - EP); C21D 8/0221 (2013.01 - EP KR); C21D 8/0226 (2013.01 - EP KR); C21D 8/0273 (2013.01 - KR); C22C 38/001 (2013.01 - EP); C22C 38/02 (2013.01 - EP KR); C22C 38/04 (2013.01 - EP KR); C22C 38/06 (2013.01 - EP); C22C 38/08 (2013.01 - EP KR); C22C 38/14 (2013.01 - EP KR); C22C 38/16 (2013.01 - KR); C22C 38/58 (2013.01 - KR); C22C 38/16 (2013.01 - EP); C22C 38/58 (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 3696287 A1 20200819; EP 3696287 A4 20200819; EP 3696287 B1 20231206; EP 3696287 C0 20231206; CN 111225987 A 20200602; CN 111225987 B 20220610; ES 2971876 T3 20240610; JP 2020537047 A 20201217; JP 7022822 B2 20220218; KR 101949036 B1 20190508; WO 2019074236 A1 20190418
DOCDB simple family (application)
EP 18865647 A 20181004; CN 201880066217 A 20181004; ES 18865647 T 20181004; JP 2020520658 A 20181004; KR 20170131605 A 20171011; KR 2018011722 W 20181004