EP 1051529 B1 20011212 - NON-MAGNETIC CORROSION RESISTANT HIGH STRENGTH STEELS
Title (en)
NON-MAGNETIC CORROSION RESISTANT HIGH STRENGTH STEELS
Title (de)
NICHTMAGNETISCHER STAHL MIT HOHER KORROSIONSBESTÄNDIGKEIT UND HOHER FESTIGKEIT
Title (fr)
ACIERS NON MAGNETIQUES A HAUTE RESISTANCE MECANIQUE ET HAUTE RESISTANCE A LA CORROSION
Publication
Application
Priority
- GB 9803029 W 19981008
- GB 9723242 A 19971105
Abstract (en)
[origin: GB2331103A] A first steel comprises 0-0.05 weight % carbon, 0-1.0 weight % silicon, 10.0-20.0 weight % manganese, 13.5-18.0 weight % chromium, 1.0-4.0 weight % nickel, 1.5-3.5 weight % molybdenum and 0.2-0.4 weight % nitrogen. A second steel comprises 0-0.2 weight % carbon, 0-1.0 weight % silicon, 10.0-20.0 weight % manganese, 13.5-18.0 weight % chromium, 1.0-7.0 weight % nickel, 1.5-4.0 weight % molybdenum and 0.2-0.4 weight % nitrogen where nickel equivalence/(chromium equivalence - 1À4) > 1.51 and nickel equivalence + chromium equivalence > 35. Such steels may be used as drill collars in oil and gas drills.
IPC 1-7
IPC 8 full level
C22C 38/58 (2006.01)
CPC (source: EP)
C22C 38/58 (2013.01)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
GB 2331103 A 19990512; GB 9723242 D0 19980107; AT E210741 T1 20011215; AU 9359698 A 19990524; BR 9813966 A 20000926; CA 2307570 A1 19990514; CA 2307570 C 20080826; DE 69802967 D1 20020124; DE 69802967 T2 20020912; DK 1051529 T3 20020408; EP 1051529 A1 20001115; EP 1051529 B1 20011212; ES 2169925 T3 20020716; NO 20002170 D0 20000427; NO 20002170 L 20000504; NO 334118 B1 20131216; WO 9923267 A1 19990514
DOCDB simple family (application)
GB 9723242 A 19971105; AT 98946594 T 19981008; AU 9359698 A 19981008; BR 9813966 A 19981008; CA 2307570 A 19981008; DE 69802967 T 19981008; DK 98946594 T 19981008; EP 98946594 A 19981008; ES 98946594 T 19981008; GB 9803029 W 19981008; NO 20002170 A 20000427