EFFECT OF 1200 F SODIUM ON AUSTENITIC AND FERRITIC STEELS. PHYSICAL PROPERTIES OF MATERIALS. Progress Report No. 33, May 1963

Technical Report · Fri Jun 21 00:00:00 EDT 1963

DOI:https://doi.org/10.2172/4702100· OSTI ID:4702100

Tests to determine the physical properties of Type 316 stainless steel and 2 1/4 Cr-- 1 Mo steel specimens in low oxide Na, He, and air at 1200 and 1100 deg F, respectively, were completad exept for three Type 316 SS and two CrMo steel creep tests in He, one Type 316 SS creep-torupture test in He, and two pre- exposed Cr-- Mo steel creep-to-rupture tests in air. Metallurgical examination of the specimens generated in three tests is continuing. Preliminary conclusions based on the results are presented. A comparison between the incomplete physical property data and the environment in which the specimens were run indicates that for Type 316 stainless steel at 1200 deg F the creep rates in He and Na are higher than in air and the number of cycles to failure in fatigue is extended by He followed by Na as compared with air. However, at low strains all three environments may show equal life. All other physical properties showed ltttie effect. For 2 1/4 Cr-- 1 Mo steel at 1100 deg F the tensile strength was lower in He than in air and the stress-rupture strength in Na was slightiy lower than for He or air. Pre-exposing the specimens for 4000 hr (in Na) lowered the stress- rupture strength. The creep rate in Na is higher than in air. The number of cycles to failure in fatigue is extended by both He and Na. The effect of He on creep is too prematare for a comparison. It is noted that some of the differences occur in a relatively short time, indicating possible surface effects. Thermodynanics will be used to determine whether the different O/sub 2/ contents of the various environments may affect surface compositions. The determination of the physical properties of 316 SS specimens in 1200 deg F Na saturated with C is planned. The measurement of the physical properties of 2 1/4 Cr-- 1 Mo steel specimens in Na having 200 to 800 ppm sodium oxide is in progress. (auth)

• Research Organization: MSA Research Corp., Callery, Penna.
• Sponsoring Organization: US Atomic Energy Commission (AEC)
• DOE Contract Number: AT(11-1)-765
• NSA Number: NSA-17-029252
• OSTI ID: 4702100
• Report Number(s): MSAR-63-91
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-63
• Country of Publication: United States
• Language: English

Related Subjects

METALS, CERAMICS, AND OTHER MATERIALS
AIR
AUSTENITE
CHROMIUM STEELS
CREEP
DEFORMATION
FAILURES
FATIGUE
FERRITES
HELIUM
HIGH TEMPERATURE
MATERIALS TESTING
METALLOGRAPHY
MOLYBDENUM ALLOYS
OXYGEN
QUANTITATIVE ANALYSIS
QUANTITY RATIO
SODIUM
SODIUM CARBIDES
SODIUM OXIDES
STAINLESS STEELS
STRAIN
STRESSES
SURFACES
TENSILE PROPERTIES
THERMODYNAMICS