Due to significant issues with highly stressed and/or cold worked stainless bar cracking as a result of sharp edges on the test strips providing a stress risers for crack initiation, specimens are failing A262-E which should not fail. When the edges are rounded to remove the stress riser, these specimens easily pass. As expected, passing relates to the clean microstructure of the material being tested.
Keywordsaustenitic stainless steel; copper sulfate; corrosion testing; etch structures; ferric sulfate; intergranular corrosion; nitric acid; oxalic acid; Austenitic stainless steel castings; Classification; Copper-copper sulfate-sulfuric acid test; Discontinuities--steel; Ditch structure; End grain pitting; Etch structures; Ferric sulfate-sulfuric acid test; Grain pits; Interdendritic ditches; Intergranular attack (IGA); Metallurgical structure; Microscopic examination--metals/alloys; Nitric acid/hydrofluoric acid test; Oxalic acid etch test; Specimen preparation (for testing)--metals/alloys; Stainless steel (corrosion testing); Step structure; Structural analysis/applications--steel; Susceptibility; Visual examination--steel; Welded steel materials/applications;
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