本文件规定了通过对比目视分析对铸铁中石墨微观结构进行分类的方法。 本文件旨在提供有关石墨分类方法的信息。其目的不是提供铸铁类型和等级适用于任何特定应用的信息。 特殊材料等级主要由机械性能决定，对于奥氏体和耐磨铸铁，则由其化学成分决定。对石墨形状和尺寸的解释不允许对满足相关材料标准中规定的要求做出统计上有效的声明。

This document specifies a method of classifying the microstructure of graphite in cast irons by comparative visual analysis. The purpose of this document is to provide information about the method of graphite classification. It is not intended to give information on the suitability of cast-iron types and grades for any particular application. The particular material grades are specified mainly by mechanical properties and, in the case of austenitic and abrasion resistant cast irons, by their chemical composition. The interpretation of graphite form and size does not allow a statistically valid statement on the fulfilment of the requirements specified in the relevant material standard.