EP 2809818 A1 20141210 - DUPLEX STEEL WITH IMPROVED NOTCH-IMPACT STRENGTH AND MACHINABILITY
Title (en)
DUPLEX STEEL WITH IMPROVED NOTCH-IMPACT STRENGTH AND MACHINABILITY
Title (de)
DUPLEXSTAHL MIT VERBESSERTER KERBSCHLAGZÄHIGKEIT UND ZERSPANBARKEIT
Title (fr)
ACIER DUPLEX AYANT UN INDICE DE RÉSILIENCE ET UNE USINABILITÉ AMÉLIORÉS
Publication
Application
Priority
- DE 102012100908 A 20120203
- EP 2013051721 W 20130130
Abstract (en)
[origin: WO2013113718A1] The invention relates to a duplex steel having improved notch-impact strength and machinability, wherein the duplex steel has the following chemical composition or consists of the following: C < 0.070 wt%, Si < 1.5 wt%, Mn < 1.0 wt%, Cr 21.0 to 23.0 wt%, Ni 1.0 to 3.0 wt%, Cu 1.0 to 3.0 wt%, N 0.10 to 0.30 wt%, Mo < 0.5 wt% and the remainder consisting of iron and impurities. The duplex steel according to the invention is characterised by very good weldability without the need for heat treatment, good machinability, high strength, good notch-impact strength at low temperatures (e.g. - 40°C) and is particularly suitable for pressure tanks.
IPC 8 full level
C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/08 (2006.01); C22C 38/16 (2006.01); C22C 38/20 (2006.01); C22C 38/22 (2006.01); C22C 38/40 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01)
CPC (source: EP)
C22C 38/001 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C21D 2211/001 (2013.01); C21D 2211/005 (2013.01)
Citation (search report)
See references of WO 2013113718A1
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)
WO 2013113718 A1 20130808; CN 104254627 A 20141231; DE 102012100908 A1 20130808; EP 2809818 A1 20141210; EP 2809818 B1 20160406; ES 2581524 T3 20160906; JP 2015511272 A 20150416; JP 6322145 B2 20180509; KR 20140127843 A 20141104
DOCDB simple family (application)
EP 2013051721 W 20130130; CN 201380006194 A 20130130; DE 102012100908 A 20120203; EP 13701640 A 20130130; ES 13701640 T 20130130; JP 2014555177 A 20130130; KR 20147024454 A 20130130