A standard striking specification and speed defined by ISO 180 and ASTM D256 is followed when carrying out the Izod Test using the Class J – Charpy and Izod Automatic Impact Testing System.

In accordance with ISO 180, a standard that outlines the method for determining plastic impact strength through the Izod test is an international standard. In this test, the angle of impact is set at 150°, and the strike velocity is maintained at 3.5 m/s.

According to ASTM D256, the Izod test, developed by ASTMA for evaluating plastics’ impact resistance, may also be used to evaluate plastic’s impact resistance. The angle of strike in this standard differs slightly from the one in the previous standard, which is 145.2°, as well as the velocity of strike which is specified as 3.46 m/s.

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