Izod Test

A pendulum type of impact test, in which the specimen is supported at one end as a cantilever beam and the energy required to break off the free end is used as a measure of impact strength. A test for resistance to impact by measuring the energy required to break a test piece 1 sq cm (0.155 sq in.) with a notch in it of 2 mm (0.078 in.) depth by striking it with a pendulum hammer from a predetermined distance. The energy required to break off the free end of the sample is a measure of the impact strength or toughness of the material.