EP 3480330 A1 20190508 - AUSTENITIC STAINLESS STEEL
Title (en)
AUSTENITIC STAINLESS STEEL
Title (de)
AUSTENITISCHER EDELSTAHL
Title (fr)
ACIER INOXYDABLE AUSTÉNITIQUE
Publication
Application
Priority
- JP 2016128321 A 20160629
- JP 2017023657 W 20170628
Abstract (en)
Provided is an austenitic stainless steel having excellent anti-carburizing properties even in a high temperature carburizing environment, and an excellent hot workability in its production. The austenitic stainless steel according to the present embodiment includes a chemical composition consisting of, in mass percent, C: 0.03 to less than 0.25%, Si: 0.01 to 2.0%, Mn: 2.0% or less, Cr: 10 to less than 22%, Ni: more than 30.0% to 40.0%, Al: more than 2.5% to less than 4.5%, Nb: 0.01 to 3.5%, Ca: 0.0005 to 0.05%, Mg: 0.0005 to 0.05%, and N: 0.03% or less, with the balance being Fe and impurities. In the austenitic stainless steel, a Cr concentration Ccr' in its outer layer and an Al concentration C Al ' in the outer layer satisfy Formula (1) for a Cr concentration Ccr in an other-than-outer-layer region and an Al concentration C Al in the other-than-outer-layer region. 0.40 ‰¤ C Cr €² / C Al €² / C Cr / C Al ‰¤ 0.80
IPC 8 full level
C22C 38/00 (2006.01); C21D 6/00 (2006.01); C21D 8/00 (2006.01); C21D 8/10 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP KR US)
C21D 6/00 (2013.01 - EP US); C21D 6/004 (2013.01 - EP); C21D 8/00 (2013.01 - EP US); C21D 8/0236 (2013.01 - EP); C21D 8/0268 (2013.01 - EP); C21D 8/10 (2013.01 - EP US); C21D 8/105 (2013.01 - EP); C21D 9/08 (2013.01 - EP); C21D 9/46 (2013.01 - EP); C22C 30/02 (2013.01 - US); C22C 38/00 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/34 (2013.01 - EP US); C22C 38/42 (2013.01 - EP KR US); C22C 38/44 (2013.01 - EP KR US); C22C 38/46 (2013.01 - EP KR US); C22C 38/48 (2013.01 - EP US); C22C 38/50 (2013.01 - EP KR US); C22C 38/54 (2013.01 - EP US); C22C 38/58 (2013.01 - EP KR US); C21D 8/105 (2013.01 - US); C21D 2211/001 (2013.01 - EP KR US)
Designated contracting state (EPC)
AL 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 RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3480330 A1 20190508; EP 3480330 A4 20200108; CA 3028610 A1 20180104; CN 109415786 A 20190301; JP 6614347 B2 20191204; JP WO2018003823 A1 20190425; KR 102124914 B1 20200619; KR 20190022723 A 20190306; SG 11201810839T A 20190130; US 2019127832 A1 20190502; WO 2018003823 A1 20180104
DOCDB simple family (application)
EP 17820177 A 20170628; CA 3028610 A 20170628; CN 201780040380 A 20170628; JP 2017023657 W 20170628; JP 2018525193 A 20170628; KR 20197002265 A 20170628; SG 11201810839T A 20170628; US 201716310613 A 20170628