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。适用材料为轧制钢板。其适用于抗拉强度不超过950 MPa且试样厚度不超过200 mm的材料。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，因为扁平化可导致止裂韧性的变化。

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.