EP 3124640 A4 20171227 - STEEL PLATE WITH YIELD STRENGTH AT 890MPA LEVEL AND LOW WELDING CRACK SENSITIVITY AND MANUFACTURING METHOD THEREFOR
Title (en)
STEEL PLATE WITH YIELD STRENGTH AT 890MPA LEVEL AND LOW WELDING CRACK SENSITIVITY AND MANUFACTURING METHOD THEREFOR
Title (de)
STAHLPLATTE MIT STRECKGRENZE BEI 890MPA UND NIEDRIGER SCHWEISSRISSEMPFINDLICHKEIT UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
PLAQUE D'ACIER AYANT UNE LIMITE D'ÉLASTICITÉ DE L'ORDRE DE 890 MPA ET UNE FAIBLE SENSIBILITÉ À LA FISSURATION DE SOUDAGE ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- CN 201410114779 A 20140325
- CN 2015070729 W 20150115
Abstract (en)
[origin: EP3124640A1] A steel plate with yield strength at an 890MPa level and low welding crack sensitivity and a manufacturing method therefor. Weight percentages of components thereof are: C: 0.06-0.13wt.%, Si: 0.05-0.70wt.%, Mn: 1.20-2.30wt.%, Mo: 0-0.25wt.%, Nb: 0.03-0.11wt.%, Ti: 0.002-0.050wt.%, Al: 0.02-0.15wt.%, and B: 0-0.0020wt.%, where 2Si+3Mn+4Mo‰¤8.5, and others being Fe and inevitable impurities. The use of controlled thermo-mechanical rolling and cooling technologies is beneficial to improvement of steel plate strength, plasticity and toughness. The yield strength of the steel plate is greater than 890MPa, the tensile strength is greater than 950MPa, the charpy impact work Akv(-20°C) is greater than or equal to 120J, and the welding crack sensitivity indicator Pcm is less than or equal to 0.25%.
IPC 8 full level
C21D 7/13 (2006.01); C22C 38/14 (2006.01)
CPC (source: EP KR US)
C21D 6/002 (2013.01 - EP US); C21D 6/005 (2013.01 - EP US); C21D 6/008 (2013.01 - EP US); C21D 8/0205 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP KR US); C21D 8/0231 (2013.01 - EP KR US); C21D 9/46 (2013.01 - EP US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/14 (2013.01 - EP KR US); C22C 38/22 (2013.01 - EP KR US); C22C 38/26 (2013.01 - EP KR US); C22C 38/28 (2013.01 - EP KR US); C22C 38/32 (2013.01 - EP KR US); C22C 38/38 (2013.01 - EP KR US)
Citation (search report)
- [I] CN 103060690 A 20130424 - BAOSHAN IRON & STEEL
- See references of WO 2015143932A1
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 3124640 A1 20170201; EP 3124640 A4 20171227; EP 3124640 B1 20201007; AU 2015235813 A1 20161006; BR 112016021752 A2 20170815; BR 112016021752 B1 20210504; CN 103898406 A 20140702; CN 103898406 B 20160824; JP 2017512903 A 20170525; JP 6502377 B2 20190417; KR 102291866 B1 20210820; KR 20160137542 A 20161130; US 2018355452 A1 20181213; WO 2015143932 A1 20151001
DOCDB simple family (application)
EP 15767692 A 20150115; AU 2015235813 A 20150115; BR 112016021752 A 20150115; CN 201410114779 A 20140325; CN 2015070729 W 20150115; JP 2016558640 A 20150115; KR 20167026018 A 20150115; US 201515128970 A 20150115