Abstract
Notched bar rupture and creep crack growth experiments have been performed in air on three different casts of Type 316 stainless steel at 625°C and 550°C. Although notch weakening are observed in one cast at 550°C, the notched bar strengthening observed in all three casts is shown to be a consequence of increased initiation times before steady state crack growth took place. Crack initiation times were found to be dependent on the particular cast in question but steady state crack growth rates were comparatively unaffected by cast-to-cast variations.
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