There are two main forms of impact test, the Izod and the Charpy test.
So please check which test does customer use. It is very necessary .
Charpy Impact Testing including notched specimen with a stanard weight pendulum swung from a set height. Charpy tests to distinguish the metal either brittle or ductile.
Izod Testing use Kinetic energy into potential energy ;The pendulum from the vertical position on the rack hanging Yang arm, the lifting arm lifting up angle, pendulum have certain potential. Release the pendulum, so that the free fall, will be placed on the support of the spline on the reverse recovery, to push the pointer, read out the sample from the dial reading out of the work A, you can calculate the impact strength: