EP 4417728 A1 20240821 - MARTENSITIC STAINLESS STEEL FOR HYDROGEN GAS ENVIRONMENT AND MANUFACTURING METHOD THEREFOR
Title (en)
MARTENSITIC STAINLESS STEEL FOR HYDROGEN GAS ENVIRONMENT AND MANUFACTURING METHOD THEREFOR
Title (de)
MARTENSITISCHER EDELSTAHL FÜR WASSERSTOFFGASUMGEBUNG UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
ACIER INOXYDABLE MARTENSITIQUE POUR ENVIRONNEMENT HYDROGÈNE GAZEUX ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
JP 2023023052 A 20230217
Abstract (en)
Disclosed is a martensitic stainless steel for a hydrogen gas environment, having a composition consisting of: 0.02 mass% ≤ C ≤ 0.30 mass%, Si ≤ 1.50 mass%, Mn ≤ 1.50 mass%, P ≤ 0.150 mass%, S ≤ 0.150 mass%, 8.0 mass% ≤ Cr ≤ 22.0 mass%, 1.0 mass% ≤ Ni ≤ 6.0 mass%, 0.01 mass% ≤ Nb ≤ 1.0 mass%, and N ≤ 0.12 mass%, and optionally at least one selected from the group consisting of: Cu ≤ 6.00 mass%, Mo ≤ 3.00 mass%, V ≤ 1.50 mass%, and B ≤ 0.0500 mass%, with the balance being Fe and inevitable impurities; having: a crystal grain size number of prior austenite grains of 2.0 or more, an amount of retained austenite of 40 vol% or less, a tensile strength of 1,500 MPa or less, and satisfying D<sub>H2(0.7)</sub>/D<sub>air</sub> ≥ 0.8.
IPC 8 full level
C22C 38/48 (2006.01); C21D 1/18 (2006.01); C21D 1/22 (2006.01); C21D 6/00 (2006.01); C21D 6/04 (2006.01); C21D 8/00 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/54 (2006.01)
CPC (source: EP KR US)
C21D 1/18 (2013.01 - EP US); C21D 1/22 (2013.01 - EP); C21D 6/004 (2013.01 - EP US); C21D 6/005 (2013.01 - US); C21D 6/008 (2013.01 - US); C21D 6/04 (2013.01 - EP US); C21D 8/005 (2013.01 - EP); C21D 8/065 (2013.01 - US); C21D 9/0062 (2013.01 - KR); C21D 9/525 (2013.01 - US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (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 KR US); C22C 38/54 (2013.01 - EP KR US); C21D 2211/001 (2013.01 - US); C21D 2211/008 (2013.01 - EP KR US)
Citation (applicant)
- WO 2015098981 A1 20150702 - UNIV KYUSHU NAT UNIV CORP [JP], et al
- JP 2003253333 A 20030910 - SUMITOMO METAL IND
- JP 2003129190 A 20030508 - SUMITOMO METAL IND
- JP 2023023052 A 20230216 - AQUAINTECH CORP
Citation (search report)
- [XA] JP 2000226614 A 20000815 - NIPPON KOKAN KK
- [XA] US 2010089504 A1 20100415 - KAWABATA MASAHIDE [JP], et al
- [XA] JP 2002004009 A 20020109 - KAWASAKI STEEL CO
- [XA] US 2004238079 A1 20041202 - KIMURA MITSUO [JP], et al
- [XA] US 4090813 A 19780523 - MINATO AKIRA, et al
- [A] US 3574601 A 19710413 - MYERS LEWIS P, et al
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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA
Designated validation state (EPC)
GE KH MA MD TN
DOCDB simple family (publication)
EP 4417728 A1 20240821; CN 118516603 A 20240820; JP 2024117136 A 20240829; KR 20240128601 A 20240826; US 2024279764 A1 20240822
DOCDB simple family (application)
EP 24157125 A 20240212; CN 202410174519 A 20240207; JP 2023023052 A 20230217; KR 20240022044 A 20240215; US 202418410526 A 20240111