EP 4130317 A4 20230517 - STEEL MATERIAL
Title (en)
STEEL MATERIAL
Title (de)
STAHLMATERIAL
Title (fr)
MATÉRIAU EN ACIER
Publication
Application
Priority
JP 2020014975 W 20200401
Abstract (en)
[origin: EP4130317A1] Provided is a steel material having excellent SSC resistance. The steel material of the present disclosure includes a chemical composition consisting of, in mass%, C: 0.035% or less, Si: 1.00% or less, Mn: 1.00% or less, P: 0.030% or less, S: 0.0050% or less, sol. Al: 0.005 to 0.100%, N: 0.001 to 0.020%, Ni: 5.00 to 7.00%, Cr: 10.00 to 14.00%, Cu: 1.50 to 3.50%, Mo: 1.00 to 4.00%, V: 0.01 to 1.00%, Ti: 0.02 to 0.30%, Co: 0.01 to 0.50%, Ca: 0.0003 to 0.0030%, O: 0.0050% or less, W: 0 to 1.50%, Nb: 0 to 0.50%, B: 0 to 0.0050%, Mg: 0 to 0.0050%, and rare earth metals (REM): 0 to 0.020%, with the balance being Fe and impurities, in which a total number density of Mn sulfide having an equivalent circular diameter of 1.0 µm or more and Ca sulfide having an equivalent circular diameter of 2.0 µm or more is 0.50 pieces/mm<sup>2</sup> or less.
IPC 8 full level
C22C 38/44 (2006.01); C21D 1/18 (2006.01); C21D 1/22 (2006.01); C21D 1/60 (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 38/42 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/52 (2006.01); C22C 38/54 (2006.01)
CPC (source: EP US)
C21D 1/18 (2013.01 - EP); C21D 1/22 (2013.01 - EP); C21D 1/25 (2013.01 - EP); C21D 1/60 (2013.01 - EP); C21D 6/004 (2013.01 - EP); C21D 8/105 (2013.01 - EP); C21D 9/08 (2013.01 - US); C21D 9/085 (2013.01 - EP); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/004 (2013.01 - EP); C22C 38/005 (2013.01 - EP US); C22C 38/02 (2013.01 - EP); C22C 38/04 (2013.01 - EP); C22C 38/06 (2013.01 - EP); 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 38/52 (2013.01 - EP US); C22C 38/54 (2013.01 - EP US); C21D 2211/004 (2013.01 - EP); C21D 2211/008 (2013.01 - EP)
Citation (search report)
- [X] EP 3460087 A1 20190327 - NIPPON STEEL & SUMITOMO METAL CORP [JP]
- [A] US 2017096722 A1 20170406 - FUJIMURA KAZUKI [JP], et al
- [A] EP 3604591 A1 20200205 - NIPPON STEEL CORP [JP]
- [A] US 5496421 A 19960305 - HASHIZUME SHUJI [JP], et al
- [A] US 2005224143 A1 20051013 - TAKABE HIDEKI [JP], et al
- [A] JP H10237604 A 19980908 - NIPPON STEEL CORP
- [A] JP 2000313941 A 20001114 - NIPPON STEEL CORP
- See references of WO 2021199368A1
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 4130317 A1 20230208; EP 4130317 A4 20230517; BR 112022019162 A2 20221122; CN 115698358 A 20230203; CN 115698358 B 20230829; JP 7364962 B2 20231019; JP WO2021199368 A1 20211007; MX 2022012281 A 20221027; US 2023175107 A1 20230608; WO 2021199368 A1 20211007
DOCDB simple family (application)
EP 20928920 A 20200401; BR 112022019162 A 20200401; CN 202080101344 A 20200401; JP 2020014975 W 20200401; JP 2022511431 A 20200401; MX 2022012281 A 20200401; US 202017906664 A 20200401