本规范涵盖了通过磁粉检测方法对优质飞机用铁磁钢（包括可硬化耐腐蚀钢）的清洁度要求，单位为英寸/磅。本规范包含取样、样品制备、检查程序和清洁度等级标准（见8.2）。

This specification covers steel cleanliness requirements in inch/pound units for premium aircraft-quality ferromagnetic steels, including hardenable, corrosion-resistant steels, by magnetic particle inspection methods. This specification contains sampling, sample preparation, inspection procedures and cleanliness rating criteria (see8.2).