本SAE推荐规程为汽车工业中使用的有限数量的聚酰胺（尼龙）提供了分类和规范系统。根据ASTM D 4066《尼龙注射和挤出材料分类系统》（PA），它要求汽车行业常用的额外描述性特征和特性。本文件仅适用于天然和非颜色匹配的黑色热稳定聚酰胺化合物。颜色匹配化合物应由专有OEM标准定义。 本文件允许使用回收、再造和再研磨材料，前提是满足本文件中规定的要求，材料未被改变或修改，以改变其安全加工和使用的适用性，并且材料应进行标识。

This SAE Recommended Practice provides a system for classification and specification for limited number of polyamides (nylons) used in the Automotive Industry. Based upon ASTM D 4066, Classification System for Nylon Injection and Extrusion Materials (PA), it calls for additional descriptive characteristics and properties commonly used in the Automotive Industry.This document applies to natural and non-color matched black, heat-stabilized polyamide compounds only. Color matched compounds shall be defined by the proprietary OEM standards.This document allows for the use of recycled, reconstituted, and regrind materials provided that the requirements as stated in this document are met, the material has not been altered or modified to change its suitability for safe processing and use, and the material shall be identified as such.