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A total of 42 evaluations in accordance with ASTM Recommended Practices for Detecting Susceptibility to Intergranular Attack in Stainless Steels (A 262-75), Practice E, were obtained from seven different organizations on the same eleven sensitized Type 304 stainless steel specimens subjected to different exposure times in boiling acidified copper-copper sulfate solution and then bent on a 1-T radius. The results indicate that subjective factors influence such evaluations, as evidenced by differences in the classification of the same specimens between different evaluators, with one specimen classified as “passed” and “failed” by approximately equal percentages of evaluators.
stainless steels, intergranular corrosion, sensitizing, acidified copper-copper sulfate, evaluation, acceptability, criteria
Principal engineer, General Electric Company, San Jose, Calif.