A compilation of the data available on the effects of radiation on tensile, creep, fatigue, impact, and hardness properties of various structural materials is presented. These properties are given as a function of test temperature, irradiation temperature, and radiation fluence. Specifically the following reactor materials are covered: (1) aluminum alloys, (2) magnesium alloys, (3) beryllium, (4) zirconium alloys, (5) mild steels, (6) stainless steels, (7) nickel alloys, and (8) refractory metals. Data on the effects of radiation on the mechanical properties of selected materials at cryogenic temperatures also are included.