1.1 本规范涵盖了通过磁粉或液体渗透检验进行无损检验时钢铸件表面检验的验收标准。 1.2 本规范适用于询价、合同、订单或规范中规定磁粉或液体渗透检验的验收标准应符合规范要求的地方 A903/A903M . 1.3 以英寸磅单位或国际单位制表示的数值应单独视为标准。 在正文中，国际单位制显示在括号中。每个系统中规定的数值并不完全相等；因此，每个系统必须彼此独立地使用。将两个系统的值结合起来可能会导致不符合本规范。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification covers acceptance criteria for the surface inspection of steel castings when nondestructively examined by magnetic particle or liquid penetrant inspection. 1.2 This specification is to be used wherever the inquiry, contract, order, or specification states that the acceptance standards for magnetic particle or liquid penetrant inspection shall be in accordance with Specification A903/A903M . 1.3 The values stated in either inch-pound units or SI units are to be regarded separately 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. 1.4 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.