EP 2312006 A1 20110420 - AUSTENITIC STAINLESS STEEL AND PROCESS FOR HYDROGENATION OF SAME
Title (en)
AUSTENITIC STAINLESS STEEL AND PROCESS FOR HYDROGENATION OF SAME
Title (de)
AUSTENITISCHER EDELSTAHL UND VERFAHREN ZU SEINER HYDROGENIERUNG
Title (fr)
ACIER INOXYDABLE AUSTÉNITIQUE ET PROCÉDÉ POUR SON HYDROGÉNATION
Publication
Application
Priority
- JP 2009062970 W 20090717
- JP 2008202713 A 20080806
Abstract (en)
Disclosed are an austenitic stainless steel, and a hydrogenation method thereof, in which occurrence of fatigue cracks and growth of fatigue cracks are suppressed by charging the austenitic stainless steel with hydrogen. In particular, focusing on the amount of diffusible hydrogen and non-diffusible hydrogen, which cause hydrogen embrittlement in austenitic stainless steel, the fatigue strength characteristics of austenitic stainless steel are improved by bringing the amount of diffusible hydrogen and non-diffusible hydrogen contained in the austenitic stainless steel to 0.0030 wt% (30 wt ppm) or higher. The austenitic stainless steel is subjected to a thermal treatment at a heating temperature of 200 to 500°C for up to 460 hours in a hydrogen environment. The hydrogen (H) contained in the austenitic stainless steel is brought thereby to 0.0030 wt% (30 wt ppm) or higher.
IPC 8 full level
C22C 38/00 (2006.01); C21D 6/00 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP KR US)
C21D 6/004 (2013.01 - EP KR US); C22C 38/001 (2013.01 - EP KR US); C22C 38/02 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP KR US); C22C 38/44 (2013.01 - EP KR US); C22C 38/46 (2013.01 - EP KR US); C22C 38/50 (2013.01 - EP KR US); C22C 38/54 (2013.01 - EP KR US); C22C 38/58 (2013.01 - EP KR US); C21D 2211/001 (2013.01 - EP KR US)
Citation (search report)
See references of WO 2010016378A1
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 MK MT NL NO PL PT RO SE SI SK SM TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
EP 2312006 A1 20110420; CA 2733658 A1 20100211; JP 2010037606 A 20100218; JP 5177747 B2 20130410; KR 20110038166 A 20110413; US 2011139321 A1 20110616; WO 2010016378 A1 20100211
DOCDB simple family (application)
EP 09804865 A 20090717; CA 2733658 A 20090717; JP 2008202713 A 20080806; JP 2009062970 W 20090717; KR 20117004976 A 20090717; US 200913057578 A 20090717