Global Patent Index - EP 3299486 A4

EP 3299486 A4 20181205 - THICK STEEL SHEET AND WELDED JOINT

Title (en)

THICK STEEL SHEET AND WELDED JOINT

Title (de)

DICKES STAHLBLECH UND SCHWEISSVERBINDUNG

Title (fr)

TÔLE D'ACIER ÉPAISSE ET JOINT SOUDÉ

Publication

EP 3299486 A4 20181205 (EN)

Application

EP 16799856 A 20160516

Priority

  • JP 2015104617 A 20150522
  • JP 2016064064 A 20160328
  • JP 2016064444 W 20160516

Abstract (en)

[origin: EP3299486A1] The purpose of the present invention is to provide a thick steel sheet having excellent sour resistance. The present invention is a thick steel sheet which contains, in mass%, 0.01-0.12% of C, 0.02-0.50% of Si, 0.6-2.0% of Mn, more than 0% but 0.030% or less of P, more than 0% but 0.004% or less of S, 0.010-0.080% of Al, 0.10-1.50% of Cr, 0.002-0.050% of Nb, 0.0002-0.05% of REM, 0.0003-0.01% of Zr, 0.0003-0.006% of Ca, more than 0% but 0.010% or less of N, and more than 0% but 0.0040% or less of O, with the balance made up of iron and unavoidable impurities. With respect to the composition of the inclusions contained in the steel and having widths of 1 µm or more, the Zr amount in the inclusions is within 1-40%, the REM amount in the inclusions is within 5-50%, the Al amount in the inclusions is within 3-30% and the Ca amount in the inclusions is within 5-60%.

IPC 8 full level

C21C 7/06 (2006.01); C21C 7/064 (2006.01); C21D 6/00 (2006.01); C21D 6/02 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/20 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C22C 38/38 (2006.01); C22C 38/48 (2006.01); C22C 38/58 (2006.01); C21D 8/02 (2006.01); C21D 9/14 (2006.01)

CPC (source: EP KR)

C21C 7/0645 (2013.01 - EP); C21D 9/46 (2013.01 - EP); C22C 38/001 (2013.01 - EP); C22C 38/002 (2013.01 - EP KR); C22C 38/005 (2013.01 - EP KR); C22C 38/02 (2013.01 - EP KR); C22C 38/04 (2013.01 - EP KR); C22C 38/06 (2013.01 - EP); C22C 38/20 (2013.01 - EP); C22C 38/22 (2013.01 - EP); C22C 38/24 (2013.01 - EP); C22C 38/26 (2013.01 - EP KR); C22C 38/28 (2013.01 - EP); C22C 38/32 (2013.01 - EP); C22C 38/38 (2013.01 - EP KR); C22C 38/48 (2013.01 - EP KR); C22C 38/58 (2013.01 - EP KR); C21D 8/0226 (2013.01 - EP); C21D 8/0263 (2013.01 - EP); C21D 9/14 (2013.01 - EP)

Citation (search report)

  • [E] EP 3208359 A1 20170823 - KOBE STEEL LTD [JP]
  • [X] JP 2014185364 A 20141002 - KOBE STEEL LTD
  • [X] JP 2007100213 A 20070419 - KOBE STEEL LTD
  • [X] KR 20100107412 A 20101005 - KOBE STEEL LTD [JP]
  • [L] N.N.: "Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications", AMERICAN NATIONAL STANDARD, 1 January 2013 (2013-01-01), West Conshohocken, PA, XP055297340, Retrieved from the Internet <URL:http://www.galvanizeit.com/uploads/ASTM-E-29-yr-13.pdf> [retrieved on 20160824], DOI: 10.1520/E0029-13
  • See references of WO 2016190150A1

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 3299486 A1 20180328; EP 3299486 A4 20181205; CN 107614724 A 20180119; JP 2016216819 A 20161222; KR 20170138505 A 20171215

DOCDB simple family (application)

EP 16799856 A 20160516; CN 201680028437 A 20160516; JP 2016064064 A 20160328; KR 20177033268 A 20160516