The creep properties of three heats of nuclear-grade Type 316 stainless steel have been studied at temperatures of 823, 873, and 923 K. Creep tests have been carried out over a wide range of stresses that produced rupture times varying from a few days to ∼10yr. Log-log plots of stress versus rupture life were linear at 823 K, while a rapid decrease in stress to rupture was observed at longer lives at 923 K. A power law relationship indicative of dislocation creep was found between steady-state creep rate and applied stress. The variation of rupture ductility with rupture life at 823 K exhibited a minimum. At other temperatures, a peak in ductility was observed. Pronounced heat-to-heat variations have been observed in the creep-rupture properties at all the test conditions. The variations have been attributed to differences in the chemical composition and in the grain size of the material. A comparison of the results with the American Society of Mechanical Engineers design criteria for time-dependent deformation is also presented.