EP 2143814 A1 20100113 - STEEL MATERIAL HAVING EXCELLENT HIGH-TEMPERATURE STRENGTH AND TOUGHNESS, AND METHOD FOR PRODUCTION THEREOF
Title (en)
STEEL MATERIAL HAVING EXCELLENT HIGH-TEMPERATURE STRENGTH AND TOUGHNESS, AND METHOD FOR PRODUCTION THEREOF
Title (de)
STAHLMATERIAL MIT HERVORRAGENDER HOCHTEMPERATURBESTÄNDIGKEIT UND FESTIGKEIT SOWIE VERFAHREN ZU SEINER HERSTELLUNG
Title (fr)
MATÉRIAU D'ACIER AYANT UNE EXCELLENTE RÉSISTANCE À UNE TEMPÉRATURE ÉLEVÉE ET UNE EXCELLENTE TÉNACITÉ, ET SON PROCÉDÉ DE PRODUCTION
Publication
Application
Priority
- JP 2008057563 W 20080411
- JP 2007103876 A 20070411
- JP 2007309289 A 20071129
Abstract (en)
A steel material superior in high temperature characteristics and toughness is provided, the fire resistant steel material containing by mass%, C: 0.001% to 0.030%, Si: 0.05% to 0.50%, Mn: 0.40% to 2.00%, Nb: 0.03% to 0.50%, Ti: 0.005% to less than 0.040%, and N: 0.0008% to less than 0.0050%, restricting P: 0.030% or less and S: 0.020% or less, and having a balance of Fe and unavoidable impurities, where the contents of C and Nb satisfy C-Nb/7.74‰¤0.004, and Ti-based oxides of a grain size of 0.05 to 10 µm are present in a density of 30 to 300/mm 2 .
IPC 8 full level
C22C 38/00 (2006.01); C21D 8/00 (2006.01); C22C 38/14 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP KR US)
C21D 7/13 (2013.01 - EP KR US); C21D 8/0226 (2013.01 - EP KR US); C21D 8/0426 (2013.01 - EP KR US); C22C 38/002 (2013.01 - KR); C22C 38/004 (2013.01 - KR); C22C 38/005 (2013.01 - KR); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP KR US); C22C 38/12 (2013.01 - EP KR US); C22C 38/14 (2013.01 - EP KR US)
Citation (search report)
See references of WO 2008126944A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2143814 A1 20100113; CN 101657555 A 20100224; CN 101657555 B 20110803; JP 5079794 B2 20121121; JP WO2008126944 A1 20100722; KR 20090122371 A 20091127; US 2010047107 A1 20100225; WO 2008126944 A1 20081023
DOCDB simple family (application)
EP 08751876 A 20080411; CN 200880011610 A 20080411; JP 2008057563 W 20080411; JP 2009509388 A 20080411; KR 20097020814 A 20080411; US 45076208 A 20080411