EP 2199419 B1 20180307 - AUSTENITIC STAINLESS STEEL
Title (en)
AUSTENITIC STAINLESS STEEL
Title (de)
AUSTENITISCHER EDELSTAHL
Title (fr)
ACIER INOXYDABLE AUSTÉNITIQUE
Publication
Application
Priority
- JP 2008067905 W 20081002
- JP 2007259387 A 20071003
- JP 2007259654 A 20071003
Abstract (en)
[origin: US2010034689A1] An austenitic stainless steel, which comprises by mass %, C: 0.04 to 0.18%, Si<=1.5%, Mn<=2.0%, Ni: 6 to 30%, Cr: 15 to 30%, N: 0.03 to 0.35%, sol. Al<=0.03% and further contains one or more elements selected from Nb<=1.0%, V<=0.5% and Ti<=0.5%, with the balance being Fe and impurities, and among the impurities P<=0.04%, S<=0.03%, Sn<=0.1%, As<=0.01%, Zn<=0.01%, Pb<=0.01% and Sb<=0.01%, and satisfy the conditions P1=S+{(P+Sn)/2}+{(As+Zn+Pb+Sb)/5}<=0.06 and 0.2<=P2=Nb+2(V+Ti)<=1.7-10xP1 has high strength and excellent resistance to cracking due to grain boundary embrittlement in the welded portion during the use at high temperatures. Therefore, the said steel can be suitably used as materials for constructing machines and equipment, such as power plant boilers, which are to be used at high temperatures for a long period of time.
IPC 8 full level
C22C 38/60 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/52 (2006.01); C22C 38/54 (2006.01)
CPC (source: EP KR US)
C22C 38/001 (2013.01 - EP KR US); C22C 38/008 (2013.01 - KR); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP KR US); C22C 38/46 (2013.01 - EP KR US); C22C 38/48 (2013.01 - EP KR US); C22C 38/50 (2013.01 - EP KR US); C22C 38/52 (2013.01 - EP KR US); C22C 38/54 (2013.01 - EP KR US); C22C 38/60 (2013.01 - KR)
Citation (examination)
SPIEKERMANN P: "Alloys - a special problem of patent law", NONPUBLISHED ENGLISH TRANSLATION OF DOCUMENT, 31 December 2000 (2000-12-31), pages 1 - 20, XP002184689
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)
US 2010034689 A1 20100211; CN 101784687 A 20100721; CN 101784687 B 20110427; EP 2199419 A1 20100623; EP 2199419 A4 20160706; EP 2199419 B1 20180307; ES 2668831 T3 20180522; JP 4258678 B1 20090430; JP WO2009044796 A1 20110210; KR 20100059957 A 20100604; WO 2009044796 A1 20090409
DOCDB simple family (application)
US 53902609 A 20090811; CN 200880109889 A 20081002; EP 08836524 A 20081002; ES 08836524 T 20081002; JP 2008067905 W 20081002; JP 2008546011 A 20081002; KR 20107007566 A 20081002