To provide a method for determining brittle crack propagation inhibiting performance of high-strength steel plates which greatly improves miniature testing method and its evaluation method, and simply/easily estimates arrest performance of any high-strength steel plate with thickness of 50 mm or more without conducting any large test such as ESSO test or double tensile test to inspect performance of high-strength steel plates. 高強度厚鋼板の脆性き裂伝播停止性能の判定において、小型試験法およびその評価方法を大幅に改善し、ESSO試験や二重引張試験の大型試験を行うことなく、板厚50mm以上の高強度厚鋼板のアレスト性能を簡便な手法で推定して、高強度厚鋼板の性能を検査する。 - 特許庁