Comparison of the mechanical strength properties of several high-chromium ferritic steels
A modified 9 Cr-1 Mo ferritic steel has been selected as an alternative material for breeder reactors. Different 9 Cr-1 Mo steels are already being used commercially in UK and USA and a 9 Cr-2 Mo steel (EM12) is being used commercially in France. The 12% Cr steel alloy HT9 is also often recommended for high-temperature service. Creep-rupture data for all six seels were analyzed to yield rupture life as a function of stress, temperature, and lot-to-lot variations. Yield and tensile strength data for the three 9 Cr-1 Mo materials were also examined. All results were compared with Type 304 stainless steel, and the tensile and creep properties of the modified and British 9 Cr-1 Mo materials were used to calculate allowable stress values S/sub 0/ per Section VIII, Division 1 and S/sub m/ per code Case N-47 to section III of the ASME Boiler and Pressure Vessel Code. these values were compared with code listings for American commercial 9 Cr-1 Mo steel, 2 1/4 Cr-1 Mo steel, and Type 304 stainless steel. The conclusion is made that the modified 9 Cr-1 Mo steel displays tensile and creep strengths superior to those of the other ferritic materials examined and is at least comparable to Type 304 stainless steel from room temperature to about 625/sup 0/C. 31 figures.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6044299
- Report Number(s):
- CONF-811069-1; ON: DE82001454; TRN: 82-000640
- Resource Relation:
- Conference: International conference on production, fabrication, properties, and application of ferritic steels for high-temperature applications, Warren, PA, USA, 6 Oct 1981
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALLOY-HT-9
MECHANICAL PROPERTIES
CHROMIUM-MOLYBDENUM STEELS
STAINLESS STEEL-304
COMPARATIVE EVALUATIONS
CREEP
DATA COMPILATION
HIGH TEMPERATURE
RUPTURES
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
YIELD STRENGTH
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
DATA
FAILURES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
NICKEL ALLOYS
NUMERICAL DATA
STAINLESS STEELS
STEELS
360103* - Metals & Alloys- Mechanical Properties