An examination has been made of the rate of intergranular stress corrosion cracking (scc) of 3Cr–0·5Mo steel in hot 8 M NaOH solution as a function of the heat treatment of the alloy. The results show that the rate of scc is extremely sensitive to the concentration of segregated phosphorus in the grain boundaries. Analysis of the segregation levels of trace elements after the steel had been heat treated at 823 K for different times is presented.
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