EP 2199421 B1 20200805 - DUPLEX STAINLESS STEEL WIRE MATERIAL, STEEL WIRE, BOLT, AND METHOD OF MANUFACTURING THE SAME
Title (en)
DUPLEX STAINLESS STEEL WIRE MATERIAL, STEEL WIRE, BOLT, AND METHOD OF MANUFACTURING THE SAME
Title (de)
DRAHTMATERIAL AUS ROSTFREIEM DUPLEXSTAHL, STAHLDRAHT, BOLZEN UND VERFAHREN ZU DESSEN HERSTELLUNG
Title (fr)
MATÉRIAU POUR FIL D'ACIER INOXYDABLE DUPLEX, FIL D'ACIER, BOULON ET PROCÉDÉ DE FABRICATION ASSOCIÉ
Publication
Application
Priority
- JP 2008068467 W 20081010
- JP 2007264992 A 20071010
- JP 2007264993 A 20071010
Abstract (en)
[origin: EP2199421A1] This austenite-ferrite duplex steel wire material for high strength highly corrosion resistant bolts, which has excellent cold forgeability and contains, in terms of mass %, C: 0.005 to 0.05%, Si: 0.1 to 1.0%, Mn: 0.1 to 10.0%: Ni: 1.0 to 6.0%, Cr: 19.0 to 30.0%, Cu: 0.05 to 3.0%, and N: 0.005 to 0.20%, with a remainder being iron and unavoidable impurities, wherein C+N is not more than 0.20%, an M value represented by formula (a) below is not more than 60, an F value represented by formula (b) below is from 45 to 85, and the tensile strength is within a range from 550 to 750 N/mm 2 . M = 551 - 462 ¢ C + N - 9.2 ¢ Si - 8.1 ¢ Mn - 29 ¢ Ni + Cu - 13.7 ¢ Cr - 18.5 ¢ Mo F = 5.6 ¢ Cr - 7.1 ¢ Ni + 2.4 ¢ Mo + 15 ¢ Si - 3.1 ¢ Mn - 300 ¢ C - 134 ¢ N - 26.6
IPC 8 full level
C21D 6/02 (2006.01); C21D 6/00 (2006.01); C21D 7/02 (2006.01); C21D 8/06 (2006.01); C21D 9/00 (2006.01); C21D 9/02 (2006.01); C21D 9/52 (2006.01); C21D 9/56 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP KR)
C21D 6/004 (2013.01 - EP); C21D 6/02 (2013.01 - EP KR); C21D 8/06 (2013.01 - EP KR); C21D 9/0093 (2013.01 - EP); C21D 9/56 (2013.01 - KR); C22C 38/001 (2013.01 - EP KR); C22C 38/002 (2013.01 - EP KR); C22C 38/02 (2013.01 - EP KR); C22C 38/42 (2013.01 - EP KR); C22C 38/44 (2013.01 - EP KR); C22C 38/58 (2013.01 - EP KR); C21D 7/02 (2013.01 - EP); C21D 8/065 (2013.01 - EP); C21D 9/02 (2013.01 - EP); C21D 9/525 (2013.01 - EP); C21D 9/56 (2013.01 - EP); C21D 2211/001 (2013.01 - EP KR); C21D 2211/005 (2013.01 - EP KR)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2199421 A1 20100623; EP 2199421 A4 20160720; EP 2199421 B1 20200805; CN 101815803 A 20100825; CN 101815803 B 20120201; ES 2814823 T3 20210329; KR 101248260 B1 20130327; KR 101287772 B1 20130719; KR 20100059956 A 20100604; KR 20120137446 A 20121220; TW 200927956 A 20090701; TW I394848 B 20130501; WO 2009048137 A1 20090416
DOCDB simple family (application)
EP 08837204 A 20081010; CN 200880110225 A 20081010; ES 08837204 T 20081010; JP 2008068467 W 20081010; KR 20107007555 A 20081010; KR 20127031527 A 20081010; TW 97138890 A 20081009