Izod Impact Test

Izod impact test specimen, shown in Figure (b), is either circular or square in cross-section and contains a V-notch at one end. The specimen is clamped at notched end in vertical plane as cantilever beam. The swinging hammer strikes the free end at a distance of 22 mm from the notch. The general construction of Izod impact testing machine is same as that of Charpy machine except the hammer. The mass of hammer in Charpy machine is distributed in a vertical plane whereas in Izod machine it is distributed in horizontal plane. Now-a-days same hammer is being used in machine with attachable strikers for charpy and izod specimens.