EP 1026273 A1 20000809 - MARTENSITE STAINLESS STEEL OF HIGH CORROSION RESISTANCE
Title (en)
MARTENSITE STAINLESS STEEL OF HIGH CORROSION RESISTANCE
Title (de)
MARTENSITISCHER ROSTFREIER STAHL MIT HOHEM KORROSIONSWIDERSTAND
Title (fr)
ACIER INOXYDABLE MARTENSITIQUE A HAUTE RESISTANCE A LA CORROSION
Publication
Application
Priority
- JP 9803243 W 19980717
- JP 19400097 A 19970718
Abstract (en)
A high-strength and high-toughness martensitic stainless steel, which is excellent in corrosion resistance to carbon dioxide, and which has no risk of cracking, even if used as welded under cathodic protection. The steel has the following basic composition (1) and satisfies the following condition (2). (1) The composition containing, on a mass basis, C: not greater than 0.04%, Cr: 7-15%, Ni: 0.7-8.0%, Al: 0.001-0.20%, or further containing one or more of Si, Mn, Cu, S, Nb, Ti, Zr, Mo, W, Ca, Mg, and La in a specified amount. (2) The following inequalities (1) and (2) are satisfied. M=98+47C-1.1Cr+1.4Ni-150Al-200Nb-50Ti-200Zr-22(Mo+0.5W)>/=50 P</=0.046-0.0008HRC where the symbols of the elements in the inequalities (1)-1 to (1)-4 and (2) indicate the contents (% by mass) of the respective elements, and HRC in the inequality (2) indicates the Rockwell C-scale hardness of the steel as quenched. <IMAGE>
IPC 1-7
IPC 8 full level
C22C 38/00 (2006.01); C22C 38/40 (2006.01); C22C 38/50 (2006.01)
CPC (source: EP)
C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/40 (2013.01); C22C 38/50 (2013.01)
Designated contracting state (EPC)
DE FR GB IT NL SE
DOCDB simple family (publication)
EP 1026273 A1 20000809; EP 1026273 A4 20051214; EP 1026273 B1 20071219; CA 2296349 A1 19990128; CA 2296349 C 20041102; DE 69838879 D1 20080131; DE 69838879 T2 20081204; JP 3555579 B2 20040818; NO 20000232 D0 20000117; NO 20000232 L 20000306; WO 9904052 A1 19990128
DOCDB simple family (application)
EP 98932588 A 19980717; CA 2296349 A 19980717; DE 69838879 T 19980717; JP 2000503256 A 19980717; JP 9803243 W 19980717; NO 20000232 A 20000117