1.范围1。1本标准规定了保护金属电弧焊用碳钢焊条的分类要求。注:括号中给出了英寸-磅当量。如有争议，应以公制值为准。1.2本标准涵盖的焊条根据（a）未稀释焊缝金属的化学要求（表1）进行分类；（b） 电极覆盖物和电极的可用性特征（表2）；（c） 焊接状态下焊缝金属的机械性能（表3）；和（d）焊条适用的焊接位置。1.3根据一种类别认证的任何电极不得根据任何其他类别认证。注:第A1条解释了分类系统。附录A第2条。

1. Scope1.1 This Standard prescribes requirements for the classification of carbon steel covered electrodes for shielded metal arc welding. Note: Inch-pound equivalents are given in brackets. In case of dispute, the metric values shall rule.1.2 Electrodes covered by this Standard are classified according to the (a) chemical requirements of undiluted weld metal (Table 1); (b) electrode covering and the usability characteristics of the electrode (Table 2); (c) mechanical properties of the weld metal, in the as-welded condition (Table 3); and (d) positions of welding for which the electrodes are suitable.1.3 Any electrode certified under one classification shall not be certified under any other classification. Note: The classification system is explained in Clause A1.2 of Appendix A.