I have found small areas of low hardness on a sample of UNS S17400 machined from rod supplied in condition A and then heat treated to H1100. Bulk of the sample is in the appropiate range. Nothing i have seen in standard literature reports hardnesses in this range.
Anil Kumar V
if suppose the heat treatment operation did not involve cooling the material to say below 25 deg C (Mf temperature of this alloy) after solution annealing , there is every chance that there is some amount of retained austenite in the matrix which may result in lower hardness in these areas.
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Belma Fakić
i agree with Mr Anil, some amount of retained austenite in the matrix, may be result in lower hardness in these areas, which can depend of diameter of rod.
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