EP 4019651 A4 20221102 - DUPLEX STAINLESS STEEL MATERIAL
Title (en)
DUPLEX STAINLESS STEEL MATERIAL
Title (de)
DUPLEXEDELSTAHLMATERIAL
Title (fr)
MATÉRIAU D'ACIER INOXYDABLE DUPLEX
Publication
Application
Priority
- JP 2019149844 A 20190819
- JP 2020031050 W 20200818
Abstract (en)
[origin: US2022145438A1] The duplex stainless steel material according to the present disclosure has a chemical composition consisting of, in mass %, C: 0.030% or less, Si: 0.20 to 1.00%, Mn: 0.50 to 7.00%, P: 0.040% or less, S: 0.0100% or less, Al: 0.100% or less, Ni: 4.20 to 9.00%, Cr: 20.00 to 28.00%, Mo: 0.50 to 2.00%, Cu: 1.90 to 4.00%, N: 0.150 to 0.350%, V: 0.01 to 1.50%, and one or more types of element selected from the group consisting of Ca: 0.0001 to 0.0200% and Mg: 0.0001 to 0.0200%, with the balance being Fe and impurities, and satisfying Formulae (1) and (2) described in the description, a microstructure consisting of 35.0 to less than 50.0% of ferrite in volume ratio and austenite as the balance, and a yield strength of 550 MPa or more.
IPC 8 full level
C22C 38/42 (2006.01); C21D 1/18 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 8/10 (2006.01); C21D 9/08 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP US)
C21D 1/18 (2013.01 - EP); C21D 6/004 (2013.01 - EP); C21D 6/005 (2013.01 - EP); C21D 8/0205 (2013.01 - EP); C21D 8/0226 (2013.01 - EP); C21D 8/10 (2013.01 - EP); C21D 9/08 (2013.01 - EP); C21D 9/46 (2013.01 - EP); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/005 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP); C22C 38/06 (2013.01 - EP US); C22C 38/42 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/46 (2013.01 - EP US); C22C 38/48 (2013.01 - EP US); C22C 38/50 (2013.01 - EP US); C22C 38/54 (2013.01 - EP US); C22C 38/58 (2013.01 - EP US)
Citation (search report)
- [X] EP 2754726 A1 20140716 - NIPPON STEEL & SUMITOMO METAL CORP [JP]
- [XI] EP 2684973 A1 20140115 - NIPPON STEEL & SUMIKIN SST [JP]
- [A] WO 2017208946 A1 20171207 - NIPPON STEEL & SUMITOMO METAL CORP [JP]
- [A] US 2013312880 A1 20131128 - MOTOYA DAISUKE [JP], et al
- [A] US 2013315776 A1 20131128 - YAMADA KENTA [JP], 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 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)
US 2022145438 A1 20220512; CA 3148069 A1 20210225; CA 3148069 C 20231024; EP 4019651 A1 20220629; EP 4019651 A4 20221102; JP 7173359 B2 20221116; JP WO2021033672 A1 20210225; WO 2021033672 A1 20210225
DOCDB simple family (application)
US 202017597745 A 20200818; CA 3148069 A 20200818; EP 20853663 A 20200818; JP 2020031050 W 20200818; JP 2021540943 A 20200818