ASTM D256 (Izod Impact)

ASTM D256 is a standardized test that measures a material's resistance to impact or sudden force, using the Izod impact test method. The test involves striking a notched sample of the material with a swinging pendulum and measuring the energy absorbed during breakage. This helps determine how tough or brittle the material is under sudden impacts, which is crucial for applications where materials may experience shocks or impacts. The results are expressed in foot-pounds or joules, providing a consistent way to compare the impact resistance of different materials.