EP 1051529 A1 20001115 - 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 HAUTE RESISTANCE, ANTICORROSION
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)
Citation (search report)
See references of WO 9923267A1
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