1.1 本规范涵盖了结构钢夏比V型缺口试验的程序，并包含两个试验频率。钢的冲击性能在同一炉次和工件内可能不同，无论是轧制、控制轧制还是热处理。因此，买方应意识到，对一块板材、棒材或形状进行测试并不能保证与加工相同热量的所有板材、棒材或形状在韧性方面与测试产品相同。正火或淬火和回火产品将减少变化程度。 1.2 本规范旨在补充规定的结构钢规范。 1.3 本规范不一定适用于所有产品规范；因此，应咨询制造商或处理器以了解预期或提供的能量吸收水平和最低测试温度。 1.4 规定了两种测试频率（P和H）。 1.5 以英寸-磅单位或国际单位制表示的数值应视为标准值。在文本中，国际单位显示在括号中。每个系统中规定的值不是精确的等价物；因此，每个系统必须相互独立使用。合并两个系统的值可能会导致不符合本规范。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

1.1 This specification covers the procedure for Charpy V-notch testing of structural steel and contains two frequencies of testing. The impact properties of steel can vary within the same heat and piece, be it as-rolled, control-rolled, or heat treated. The purchaser should, therefore, be aware that testing of one plate, bar, or shape does not provide assurance all plates, bars, or shapes of the same heat as processed will be identical in toughness with the product tested. Normalizing or quenching and tempering the product will reduce the degree of variation. 1.2 This specification is intended to supplement specifications for structural steel when so specified. 1.3 This specification does not necessarily apply to all product specifications; therefore, the manufacturer or processor should be consulted for energy absorption levels and minimum testing temperatures that can be expected or supplied. 1.4 Two frequencies of testing (P and H) are prescribed. 1.5 The values stated in either inch-pound units or SI units are to be regarded as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this specification. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.