EP 4234770 A1 20230830 - FERRITE-BASED STAINLESS STEEL AND COMPONENT FOR EXHAUST GAS
Title (en)
FERRITE-BASED STAINLESS STEEL AND COMPONENT FOR EXHAUST GAS
Title (de)
FERRITBASIERTER EDELSTAHL UND KOMPONENTE FÜR ABGAS
Title (fr)
ACIER INOXYDABLE À BASE DE FERRITE ET COMPOSANT POUR GAZ D?ÉCHAPPEMENT
Publication
Application
Priority
- JP 2020178302 A 20201023
- JP 2021039115 W 20211022
Abstract (en)
This ferritic stainless steel has a predetermined chemical composition, at least one type of oxides of oxides containing 5 mass% or more of Al and oxides containing 5 mass% or more of Si are present on the surface, and, among the oxides present on the surface, the number of oxides having a diameter D of 0.1 µm or more and 2.0 µm or less is 10 or more per 93 µm<sup>2</sup>, the diameter D being represented by D = (Dmax + Dmin)/2 where Dmax is the maximum diameter of the oxide on the surface and Dmin is the minimum diameter of the oxide on the surface.
IPC 8 full level
C25F 1/06 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/50 (2006.01); C22C 38/60 (2006.01); C23G 1/08 (2006.01)
CPC (source: EP KR US)
C21D 1/74 (2013.01 - EP); C21D 6/002 (2013.01 - EP); C21D 8/0226 (2013.01 - EP US); C21D 8/0236 (2013.01 - US); C21D 8/0273 (2013.01 - EP US); C21D 8/0278 (2013.01 - EP); C21D 9/46 (2013.01 - EP KR); C22C 38/001 (2013.01 - KR US); C22C 38/002 (2013.01 - EP US); C22C 38/004 (2013.01 - EP); C22C 38/005 (2013.01 - EP); C22C 38/008 (2013.01 - EP KR); 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 KR); C22C 38/42 (2013.01 - EP KR US); C22C 38/44 (2013.01 - EP KR); C22C 38/46 (2013.01 - EP KR); C22C 38/48 (2013.01 - EP KR US); C22C 38/50 (2013.01 - EP KR); C22C 38/54 (2013.01 - EP); C23C 8/02 (2013.01 - EP); C23C 8/10 (2013.01 - EP); C23C 8/16 (2013.01 - EP); C23C 8/80 (2013.01 - EP); C23C 10/08 (2013.01 - EP); C23C 30/005 (2013.01 - KR); C23G 1/08 (2013.01 - EP KR); C23G 1/085 (2013.01 - EP US); C23G 1/086 (2013.01 - EP US); C25F 1/06 (2013.01 - EP KR US); C21D 2211/005 (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
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4234770 A1 20230830; CA 3195974 A1 20220428; CN 116323995 A 20230623; JP WO2022085788 A1 20220428; KR 20230070270 A 20230522; MX 2023004503 A 20230510; US 2023383390 A1 20231130; WO 2022085788 A1 20220428
DOCDB simple family (application)
EP 21882927 A 20211022; CA 3195974 A 20211022; CN 202180071452 A 20211022; JP 2021039115 W 20211022; JP 2022557621 A 20211022; KR 20237013155 A 20211022; MX 2023004503 A 20211022; US 202118032771 A 20211022