EP 3831978 A4 20210908 - TI- AND NB-ADDED FERRITIC STAINLESS STEEL EXCELLENT IN LOW-TEMPERATURE TOUGHNESS OF WELDS
Title (en)
TI- AND NB-ADDED FERRITIC STAINLESS STEEL EXCELLENT IN LOW-TEMPERATURE TOUGHNESS OF WELDS
Title (de)
TI- UND NB-ZUGESETZTER FERRITISCHER EDELSTAHL MIT AUSGEZEICHNETER TIEFTEMPERATURZÄHIGKEIT VON SCHWEISSNÄHTEN
Title (fr)
ACIER INOXYDABLE FERRITIQUE AVEC AJOUT DE TI ET NB AYANT UNE EXCELLENTE TÉNACITÉ DE SOUDURES À BASSE TEMPÉRATURE
Publication
Application
Priority
- KR 20180090874 A 20180803
- KR 2018013229 W 20181102
Abstract (en)
[origin: EP3831978A1] A Ti, Nb-added ferritic stainless steel with excellent low-temperature toughness of weld zone according to an embodiment of present disclosure includes, in percent (%) by weight of the entire composition, C: 0.004 to 0.015%, N: 0.004 to 0.015%, Si: 0.01 to 0.7%, Mn: 0.01 to 0.7%, P: 0.0001 to 0.04%, S: 0.0001 to 0.005%, Cr: 10 to 30%, Al: 0.005 to 0.04%, Ti: 0.1 to 0.5%, Nb: 0.1 to 0.6%, Ca: 0.0001 to 0.003%, the remainder of iron (Fe) and other inevitable impurities, satisfies the following equation (1), and Al-Ca-Ti-Mg-O-based oxide and Ti-Nb-C-N carbonitride containing the oxide have an average diameter of 3 to 10 µm and a distribution density of 4 /mm<sup>2</sup> or more. Ti+0.5*Nb*C+N/Al>0.25
IPC 8 full level
C22C 38/26 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/28 (2006.01)
CPC (source: EP US)
C21C 5/005 (2013.01 - US); C21D 8/105 (2013.01 - US); C22C 38/001 (2013.01 - US); C22C 38/002 (2013.01 - US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/26 (2013.01 - EP US); C22C 38/28 (2013.01 - EP US); C21D 2211/005 (2013.01 - US)
Citation (search report)
- [X] KR 20100077244 A 20100708 - POSCO [KR]
- [A] KR 20150000893 A 20150105 - NIPPON STEEL & SUMIKIN SST [JP]
- [A] US 2004154708 A1 20040812 - TAKAHASHI AKIHIKO [JP], et al
- [A] KR 20180000782 A 20180104 - POSCO [KR]
- [A] US 5685923 A 19971111 - TAKATA KEN [JP], et al
- See references of WO 2020027380A1
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 3831978 A1 20210609; EP 3831978 A4 20210908; CN 112654727 A 20210413; KR 20200015265 A 20200212; US 2021310105 A1 20211007; WO 2020027380 A1 20200206
DOCDB simple family (application)
EP 18928736 A 20181102; CN 201880097237 A 20181102; KR 20180090874 A 20180803; KR 2018013229 W 20181102; US 201817265374 A 20181102