本文件规定了球墨铸铁的等级和相应要求。 本文件规定了两组球墨铸铁等级，其分类基于从铸造样品制备的机加工试样上测量的机械性能。第一组主要涉及铁素体至珠光体等级。第二组涉及固溶体强化铁素体等级。 本文件还根据硬度给出了信息分类。 本文件不适用于以下情况: -根据ISO 2531和ISO 7186规定用于管道、配件和附件的球墨铸铁； -根据ISO 2892规定的高合金（奥氏体）球墨铸铁； -根据ISO 17804规定的奥氏体铁素体铸铁。

This document defines the grades and the corresponding requirements for spheroidal graphite cast irons. This document specifies two groups of spheroidal graphite cast iron grades by a classification based on mechanical properties measured on machined test pieces prepared from cast samples. The first group deals mainly with ferritic to pearlitic grades. The second group deals with solid-solution strengthened ferritic grades. This document also gives an informative classification as a function of hardness. This document does not apply to the following: — spheroidal graphite cast irons used for pipes, fittings and accessories which are specified in accordance with ISO 2531 and ISO 7186; — highly alloyed (austenitic) spheroidal cast irons which are specified in accordance with ISO 2892; — ausferritic cast irons which are specified in accordance with ISO 17804.