根据根据SAE J661《制动衬片质量试验程序》和SAE J2975《制动摩擦材料中铜和其他元素的测量》进行的试验获得的数据，本SAE推荐规程旨在提供一种统一的识别方法，可用于对制动衬片的摩擦系数进行分类。 注:需要强调的是，本文件没有规定制动衬片的摩擦要求，也没有规定制动衬片的重要特性，这些特性必须在整体制动性能中加以考虑。由于包括制动系统设计和操作环境在内的其他因素，从本文件中获得的摩擦代码不能可靠地用于预测制动系统性能。

This SAE Recommended Practice is intended to provide a uniform means of identification which may be used to classify the friction coefficient of brake linings, based on data obtained from tests conducted in accordance with SAE J661 Brake Lining Quality Test Procedure and SAE J2975 Measurement of Copper and other elements in Brake Friction Materials. NOTE: It is emphasized that this document does not establish friction requirements for brake linings, nor does it designate significant characteristics of brake linings which must be considered in overall brake performance. Due to other factors that include brake system design and operating environment, the friction codes obtained from this document cannot reliably be used to predict brake system performance.