Optimized Specifications for Types 304 and 316 Stainless Steel in Long-Term High-Temperature Service Applications
- Oak Ridge National Laboratory (ORNL)
The mechanical properties of types 304 and 316 stainless steel vary considerably from heat to heat at temperatures within the creep range. The objective of this effort was to identify the magnitude and causes of these variations and then to recommend improved material purchasing specifications that would reduce data scatter and optimize performance of these steels for high-temperature service. Mechanical properties of interest included tensile (elastic and plastic), creep and creep rupture, strain-controlled fatigue, crack propagation, hardening parameters, and toughness. The importance of controlling such variables as grain size, levels of warm or cold work, carbon and nitrogen content, and residual element content are discussed in terms of the variability in the above properties. British, French, and current US specifications for austenitic stainless steels to be employed as structural materials in fast breeder reactor service are compared. Suggestions are given for target ranges within current specifications as goals to be sought to decrease data scatter.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 707698
- Report Number(s):
- ORNL-6005
- Country of Publication:
- United States
- Language:
- English
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