The influence of an oxidizing molten-nitrate salt (60% sodium nitrate-40% potassium nitrate) on the mechanical properties of 2.25Cr-1Mo has been examined through a series of slow-strain-rate tests at 450 and 525 C. By comparing fracture strain, reduction in area, and the ultimate strength of air- exposed specimens to these same parameters for specimens tested in the binary- salt mixture, the susceptibility of the alloy to environmental degradation could be ascertained. Exposure to the nitrate resulted in a loss of ductility as measured by either the engineering fracture strain or reduction in area at both temperatures studied. At these temperatures, the ductility loss was most pronounced at the lowest strain rates (1x10(super -7)sec(super -1)). In general, for all strain rates examined, the degree of ductility loss was greater at 525 than at 450 C.
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