球墨铸铁.分类

[中文适用范围]： 本文件定义了球墨铸铁的牌号和相应的要求。 本文件规定了两组球墨铸铁牌号，其分类是根据由铸造样品制备的机加工试件测量的机械性能进行的。 第一组主要涉及铁素体到珠光体材质。 第二组涉及固溶强化铁素体材质。 该文件还给出了根据硬度的信息分类。 本文件不适用于以下各项： ——按照 ISO 2531 和 ISO 7186 规定的用于管道、管件和附件的球墨铸铁； ——按照 ISO 2892 规定的高合金（奥氏体）球墨铸铁； ——按照 ISO 17804 规定的奥铁素体铸铁。 [外文原描述]： 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.