EP 2843073 B1 20170802 - ULTRAHIGH-TENSILE-STRENGTH STEEL PLATE
Title (en)
ULTRAHIGH-TENSILE-STRENGTH STEEL PLATE
Title (de)
STAHLPLATTE MIT EXTREM HOHER ZUGFESTIGKEIT
Title (fr)
TÔLE D'ACIER AVEC TRÈS HAUTE RÉSISTANCE À LA TRACTION
Publication
Application
Priority
JP 2013066349 W 20130613
Abstract (en)
[origin: EP2843073A1] A steel plate includes, as a chemical composition, by mass%, C: 0.015% to 0.045%, Mn: 1.80% to 2.20%, Cu: 0.40% to 0.70%, Ni: 0.80% to 1.80%, Nb: 0.005% to 0.015%, Mo: 0.05% to 0.25%, Ti: 0.005% to 0.015%, B: 0.0004% to 0.0020%, N: 0.0020% to 0.0060%, and O: 0.0015% to 0.0035%, in which a number of oxide grains having an equivalent circle diameter of 2 µm or more is 20 particles/mm 2 or less and a number of Ti oxides having an equivalent circle diameter of 0.05 µm to 0.5 µm is 1.0 × 10 3 particles/mm 2 to 1.0 × 10 5 particles/mm 2 at a thickness center portion of a cross section in a thickness direction.
IPC 8 full level
C21D 9/46 (2006.01); B22D 11/22 (2006.01); C21D 1/18 (2006.01); C21D 1/25 (2006.01); C21D 8/02 (2006.01); C21D 9/50 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01); C22C 38/58 (2006.01)
CPC (source: CN EP KR)
B22D 11/22 (2013.01 - CN KR); C21D 1/18 (2013.01 - EP KR); C21D 1/25 (2013.01 - EP KR); C21D 8/02 (2013.01 - CN KR); C21D 9/46 (2013.01 - EP KR); C21D 9/50 (2013.01 - EP KR); C22C 38/00 (2013.01 - CN EP); C22C 38/001 (2013.01 - EP); C22C 38/002 (2013.01 - EP); C22C 38/02 (2013.01 - CN EP); C22C 38/04 (2013.01 - EP KR); C22C 38/06 (2013.01 - EP); C22C 38/08 (2013.01 - EP KR); C22C 38/12 (2013.01 - EP KR); C22C 38/14 (2013.01 - EP); C22C 38/16 (2013.01 - EP KR); C22C 38/42 (2013.01 - EP); C22C 38/44 (2013.01 - CN EP); C22C 38/46 (2013.01 - CN EP); C22C 38/48 (2013.01 - EP); C22C 38/50 (2013.01 - EP); C22C 38/54 (2013.01 - EP); C22C 38/58 (2013.01 - CN EP); B22D 11/22 (2013.01 - EP); C21D 8/02 (2013.01 - EP); C21D 2211/004 (2013.01 - EP 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
DOCDB simple family (publication)
EP 2843073 A1 20150304; EP 2843073 A4 20160106; EP 2843073 B1 20170802; CN 104364405 A 20150218; CN 104364405 B 20161207; JP 5445723 B1 20140319; JP WO2014199488 A1 20170223; KR 101679498 B1 20161124; KR 20150020181 A 20150225; WO 2014199488 A1 20141218
DOCDB simple family (application)
EP 13886145 A 20130613; CN 201380028579 A 20130613; JP 2013066349 W 20130613; JP 2013544892 A 20130613; KR 20147033089 A 20130613