本规范规定了焊接用碳素钢和低合金钢药芯焊条的分类要求 药芯焊丝电弧焊和气体保护金属电弧焊用金属药芯焊条。要求包括化学成分 以及焊缝金属的机械性能和某些可用性特征。可选的、补充的指示符 还包括可扩散氢，并表明符合特殊机械性能要求 当焊接金属采用低热量输入、快速冷却速度和高热量输入、缓慢冷却速度程序进行熔敷时。 标准尺寸、标记、制造和包装包括或参考了其他要求。 A. 本规范随附指南，作为所用分类系统和 碳素钢和低合金钢药芯焊条和金属药芯焊条的预期用途。本规范使用美国惯用单位和国际单位制（SI）。既然这些是 不是等效的，每个系统必须独立使用。

This specification prescribes the requirements for classification of carbon and low-alloy steel flux cored electrodes for flux cored arc welding and metal cored electrodes for gas metal arc welding. The requirements include chemical composition and mechanical properties of the weld metal and certain usability characteristics. Optional, supplemental designators are also included for diffusible hydrogen and to indicate conformance to special mechanical property requirements when the weld metal is deposited using low heat input, fast cooling rate and high heat input, slow cooling rate procedures. Additional requirements are included or referenced for standard sizes, marking, manufacturing, and packaging. A guide is appended to the specification as a source of information concerning the classification system employed and the intended use of carbon and low-alloy steel flux cored and metal cored electrodes.This specification makes use of both U.S. Customary Units and the International System of Units (SI). Since these are not equivalent, each system must be used independently of the other.