EP 0188995 B1 19910123 - HIGH CHROMIUM CAST STEEL FOR HIGH-TEMPERATURE PRESSURE CONTAINER AND METHOD FOR THE THERMAL TREATMENT THEREOF
Title (en)
HIGH CHROMIUM CAST STEEL FOR HIGH-TEMPERATURE PRESSURE CONTAINER AND METHOD FOR THE THERMAL TREATMENT THEREOF
Publication
Application
Priority
- JP 21632284 A 19841017
- JP 21632384 A 19841017
Abstract (en)
[origin: EP0188995A1] A high chromium steel for high-temperature, pressure container consisting of, in weight percent, 0.08-0.12% of carbon, up to 0.7% of silicon, up to 0.8% of manganese, 0.4-0.7% of nickel, 9-11% of chromium, 0.65-1.00% of molybdenum, 0.13-0.20% of vanadium, 0.03-0.07% of niobium, 0.03-0.07% of nitrogen, optionally, up to 0.7% of cobalt, the balance being iron and inevitable impurities, is described. A method for the thermal treatment of this cast steel is also described, according to wich the cast steel is heated to a temperature of 1000-1100 DEG C and normalized, cooled down to a temperature not higher than 250 DEG C, followed by tempering once in a temperature range of 550-750 DEG C and cooling down to a temperature under 150 DEG C. The resulting steel is finally temperd at 680-750 DEG C.
IPC 1-7
IPC 8 full level
C22C 38/00 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01)
CPC (source: EP)
C22C 38/001 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01)
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0188995 A1 19860730; EP 0188995 B1 19910123; DE 3581527 D1 19910228
DOCDB simple family (application)
EP 85730139 A 19851011; DE 3581527 T 19851011