本规范涵盖了通过磁粉检测方法确定的飞机质量、铁磁性、可硬化、耐腐蚀钢的钢清洁度要求，单位为英寸/磅。本规范包括取样、试样制备和检验程序以及清洁度评定标准（见8.2）。

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