[en] Stress corrosion tests have been conducted on martensitic, ferritic, and austenitic steels and nickel-base alloys. The tests were conducted on stressed U-bend specimens cut from sheet and tubing and on C-ring specimens cut from tubing. The deoxygenated environments were 10 percent NaOH at 600 and 630⁰F (316 and 332⁰C) and 50 percent NaOH at 600⁰F (316⁰C). The effects of temper embrittlement and sensitization on applicable alloys were studied. It was found that U-bend specimens cracked more readily than C-ring specimens, and that the choice of specimen can affect the relative ranking of some alloys. Temper embrittlement was found to be deleterious to the ferritic alloys, and sensitization was not found to be damaging to the austenite alloys. The results are discussed with reference to stress, alloy composition, and structure