Charpy impact test is used to determine resistance to notch sensitivity of metallic materials (toughness) of the test. Preparation of a certain shape and size of the metal specimen, it has a U-shaped notch or V-shaped notch in the Charpy impact test machine is simple beam state to lift the pendulum tester to make a shock along the specimen gap thrust, with a break when the pendulum rises a high degree of deviation of the sample re-absorption of power, that is, Aku and Akv. Testimony can impact tests at different temperatures. Absorbed energy value (joules) is large, that toughness is good, the gaps in the structure or other stress concentration is not sensitive. In recent years, important structural materials commonly used V-notch impact test specimens.