[en] This paper aims to critically analyze the tensile and fracture toughness test results obtained on beryllium irradiated in various conditions. Four ITER grade beryllium alloys (S65 and S200 powder, VHP and HIP consolidation) were tested in the reference condition, thermal aged condition and irradiated condition (fluence ∝ 0.5 to 2.5 10²¹ n/cm, E>1 MeV; irradiation temperatures ∝ 200 to 600 C). This data bank was systematically evaluated in terms of effect of material grade, effect of thermal ageing, effect of irradiation temperature and neutron fluence. It is found that the four grades are quite similar and no thermal ageing effect could be evidenced. VHP materials exhibit lower strength than HIP samples but fracture toughness is significantly higher. Irradiation drastically reduces the ductility and fracture toughness. Scanning electron microscopic investigations revealed that irradiation at 600 C promotes intergranular fracture due to bubbles formed at grain boundaries. (orig.)