Run-arrest behavior of brittle crack in steel has been investigated since a lot of severe accidents by brittle failure. In order to evaluate arrest toughness of materials, various test methods were developed. In 2014, arrest toughness evaluation standard which determined the test method of temperature gradient type ESSO test was established through activities in the Japan Welding Engineering Society. However simplified test method is desired because ESSO test requires large specimen and large test rig. In this study, common material is evaluated by newly suggested small test, " press-notched bend

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