本SAE推荐规程提供了通过磁粉法对钢进行清洁度评定的评定程序。该程序基于计算适应症的数量（频率），并使用加权值来获得严重性系数。概述的方法与SAE航空航天材料规范AMS 2301中描述的方法类似。

This SAE Recommended Practice provides a rating procedure for the cleanliness rating of steels by the magnetic particle method. The procedure is based on counting the number of indications (frequency) and employs a weighted value to obtain a severity factor. The method outlined is similar to that described in SAE Aerospace Material Specification AMS 2301.