本文件规定了测定脆性止裂韧性的试验方法。 它适用于表现出韧脆转变行为的铁素体钢母材。可应用的 材料是轧制的钢板。适用于抗拉强度不超过950 MPa的材料 以及厚度小于等于200 mm的试件。止裂温度范围在-196°C和+100°C之间。本文件可适用于扁平轧制钢板，但不适用于扁平钢管，因为扁平化可能导致止裂韧性的变化。交叉引用:ISO 7500-1ASTM E1221-12aASTM E1221-12A购买本文件时提供的所有当前修订版均包含在购买本文件中。

This document specifies a test method for the determination of brittle crack arrest toughness. It is applicable to ferritic steel base metals exhibiting ductile to brittle transition behaviour. Applicable materials are rolled steel plates. It is intended for materials with a tensile strength of 950 MPa or less and a test piece thickness of 200 mm or less. The range of arrest temperatures is between –196 °C and +100 °C. This document can be applied to flat rolled steel plates but not to flattened steel pipes because the flattening can cause changes in arrest toughness.Cross References:ISO 7500-1ASTM E1221 - 12aASTM E1221-12aAll current amendments available at time of purchase are included with the purchase of this document.