本SAE标准涵盖了在不同厚度的单独铸造试件上测量的最低机械性能以及汽车和相关工业中使用的球墨铸铁件的微观结构要求。铸件可以在铸态或热处理状态下指定。如果铸件经过热处理，则需要客户的事先批准。 附录提供了有关化学成分、微观结构和铸件机械性能的一般信息，以及特定使用条件的其他信息。 在这个标准中，SI单位是主要的，in-lb单位是派生的。

This SAE standard covers the minimum mechanical properties measured on separately cast test pieces of varying thickness and microstructural requirements for ductile iron castings used in automotive and allied industries. Castings may be specified in the as-cast or heat-treated condition. If castings are heat-treated, prior approval from the customer is required. The appendix provides general information on chemical composition, microstructure and casting mechanical properties, as well as other information for particular service conditions. In this standard SI units are primary and in-lb units are derived.