1.范围1。1本标准规定了低合金钢焊条的分类和认证要求。1.2本标准中规定的焊条根据（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） 焊接或热处理状态下焊缝金属的机械性能（表3和表4）；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.1.4中的2以SI（公制）单位给出的值为标准

1. Scope1.1 This Standard prescribes requirements for the classification and certification of low alloy steel electrodes for sh ielded metal arc welding.1.2 Electrodes specified in 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 or heat-treated condition (Tables 3 and 4); 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.1.4 The values given in SI (metric) units are the standar