EP 2248918 A1 20101110 - AUSTENITIC STAINLESS STEEL AND PROCESS FOR HYDROGEN REMOVAL THEREOF
Title (en)
AUSTENITIC STAINLESS STEEL AND PROCESS FOR HYDROGEN REMOVAL THEREOF
Title (de)
AUSTENITISCHER EDELSTAHL UND WASSERSTOFFENTFERNUNGSVERFAHREN DAFÜR
Title (fr)
ACIER INOXYDABLE AUSTÉNITIQUE ET PROCÉDÉ POUR LE RETRAIT D'HYDROGÈNE À PARTIR DE CELUI-CI
Publication
Application
Priority
- JP 2009052131 W 20090209
- JP 2008049100 A 20080229
Abstract (en)
The present invention focuses on diffusible hydrogen and non-diffusible hydrogen that cause hydrogen embrittlement in an austenitic stainless steel, and provides the austenitic stainless steel having diffusible hydrogen and non-diffusible hydrogen removed therefrom, and a method for removing hydrogen therefrom. In order to remove diffusible hydrogen and non-diffusible hydrogen, which cause hydrogen embrittlement in the austenitic stainless steel, an aging treatment is performed to the austenitic stainless steel at a temperature ranging from 200 to 1100°C while being kept in an air atmosphere. As a result, the hydrogen (H) content in the austenitic steel is removed to 0.001 wt% (1 wt ppm) or less.
IPC 8 full level
C21D 6/00 (2006.01); C21D 3/06 (2006.01); C21D 9/28 (2006.01); C21D 9/30 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/40 (2006.01); C22C 38/44 (2006.01)
CPC (source: EP KR US)
C21D 3/06 (2013.01 - EP KR US); C21D 6/00 (2013.01 - KR); C21D 6/002 (2013.01 - EP KR US); C21D 6/004 (2013.01 - EP KR US); C21D 9/00 (2013.01 - EP US); C21D 9/28 (2013.01 - EP KR US); C21D 9/30 (2013.01 - EP US); C22C 38/002 (2013.01 - EP KR US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP KR US); C22C 38/40 (2013.01 - EP KR US); C22C 38/44 (2013.01 - EP KR US); C21D 2211/001 (2013.01 - EP KR US)
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 TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
EP 2248918 A1 20101110; EP 2248918 A4 20130703; CA 2715814 A1 20090903; CN 101960024 A 20110126; JP WO2009107475 A1 20110630; KR 101212866 B1 20121214; KR 20100122910 A 20101123; US 2011005645 A1 20110113; WO 2009107475 A1 20090903
DOCDB simple family (application)
EP 09714474 A 20090209; CA 2715814 A 20090209; CN 200980106703 A 20090209; JP 2009052131 W 20090209; JP 2010500636 A 20090209; KR 20107018634 A 20090209; US 91935309 A 20090209