EP 1143023 A1 20011010 - STEEL FOR WELDED STRUCTURE PURPOSE EXHIBITING NO DEPENDENCE OF HAZ TOUGHNESS ON HEAT INPUT AND METHOD FOR PRODUCING THE SAME
Title (en)
STEEL FOR WELDED STRUCTURE PURPOSE EXHIBITING NO DEPENDENCE OF HAZ TOUGHNESS ON HEAT INPUT AND METHOD FOR PRODUCING THE SAME
Title (de)
STAHL FÜR GESCHWEISSTE STRUKTUREN, WOBEI DIE ZÄHIGKEIT UNABHÄNGIG VOM EINBRINGEN VON WÄRMEIST, UND HERSTELLUNGSVERFAHREN
Title (fr)
ACIER POUR STRUCTURE SOUDEE DONT LA TENACITE DE ZONE THERMIQUEMENT AFFECTEE NE DEPEND PAS D'UN APPORT DE CHALEUR, ET PROCEDE DE PRODUCTION ASSOCIE
Publication
Application
Priority
- JP 0007091 W 20001012
- JP 28941299 A 19991012
Abstract (en)
The present invention relates to a steel for a welded structure with excellent HAZ toughness, containing, in terms of wt%, C: 0.01 to 0.2%, Si: 0.02 to 0.5%, Mn: 0.3 to 2%, P: 0.03% or less, S: 0.0001 to 0.03%, Al: 0.0005 to 0.05%, Ti: 0.003 to 0.05%, Mg: 0.0001 to 0.01% and 0: 0.0001 to 0.008%, with the balance consisting of Fe and unavoidable impurities; and having particles dispersed in the steel at an average particle interval of 30 to 100 mu m, the particles being formed by precipitating either any one of sulfides and nitrides singly or the both thereof in combination using Mg contained oxides with the particle sizes of 0.2 to 5 mu m as their nuclei, or particles dispersed in the steel at an average particle interval of 30 mu m or less, the particles being formed by precipitating either any one of sulfides and nitrides singly or the both thereof in combination using Mg contained oxides with the particle sizes of 0.005 to less than 0.2 mu m as their nuclei. <IMAGE>
IPC 1-7
IPC 8 full level
C21C 7/06 (2006.01); C21C 7/064 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/14 (2006.01)
CPC (source: EP KR)
C21C 7/06 (2013.01 - EP); C21C 7/064 (2013.01 - EP); C22C 38/002 (2013.01 - EP); C22C 38/04 (2013.01 - EP KR); C22C 38/14 (2013.01 - EP)
Designated contracting state (EPC)
DE FR
DOCDB simple family (publication)
EP 1143023 A1 20011010; EP 1143023 A4 20030102; EP 1143023 B1 20050601; DE 60020522 D1 20050707; DE 60020522 T2 20051124; JP 3802810 B2 20060726; KR 100430067 B1 20040503; KR 20010080751 A 20010822; WO 0127342 A1 20010419
DOCDB simple family (application)
EP 00966448 A 20001012; DE 60020522 T 20001012; JP 0007091 W 20001012; JP 2001529471 A 20001012; KR 20017007269 A 20010611