1.1本分类系统涵盖了使用四字符命名系统对橡胶级炭黑的分类。第一个字符表示炭黑对含有炭黑的典型橡胶化合物的固化速率的影响。第二个字符给出了炭黑平均表面积的信息。最后两个字符是任意指定的。 1.2表1列出了在本分类系统发布时当前指定编号的所有橡胶级炭黑及其一些典型特性。表1中未列出的ASTM分类号（“N”或“S”名称）已被撤销或当前未分配。禁止使用非活动或未分配的N或S名称，直到该名称被正式重新激活或由D24小组委员会分配。 41 1.3以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。

1.1 This classification system covers the classification of rubber-grade carbon blacks by the use of a four-character nomenclature system. The first character gives some indication of the influence of the carbon black on the rate of cure of a typical rubber compound containing the black. The second character gives information on the average surface area of the carbon black. The last two characters are assigned arbitrarily. 1.2 All rubber-grade carbon blacks for which a number is currently assigned at the time of publication of this classification system are listed in Table 1 together with some of their typical properties. ASTM classification numbers ("N" or "S" designation) not listed in Table 1 have either been withdrawn or are not currently assigned. The use of inactive or unassigned N or S designations is prohibited until such a time as the designation is officially reactivated or assigned by Subcommittee D24.41 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.