本规范规定了药芯焊丝电弧焊用碳钢焊条的分类要求。要求包括焊缝金属的化学成分和机械性能以及某些可用性特征。AWS A5。20/A5。20M规范还包括可选的补充代号，用于提高韧性和可扩散氢，并表明当使用低热输入、快速冷却速度和高热输入、慢速冷却速度程序沉积焊缝金属时，符合特殊机械性能要求。包括标准尺寸、标记、制造和包装的额外要求。本规范附有一份指南，作为所用分类系统和碳钢药芯焊条预期用途的信息来源。本规范使用美国惯用单位和国际单位制（SI）。由于这些系统并不等同，因此每个系统必须独立使用。

This specification prescribes the requirements for classification of carbon steel electrodes for flux cored arc welding. The requirements include chemical composition and mechanical properties of the weld metal and certain usability characteristics.The AWS A5.20/A5.20M specification also includes optional, supplemental designators for improved toughness and diffusible hydrogen and to indicate conformance to special mechanical property requirements when the weld metal is deposited using both low heat input, fast cooling rate and high heat input, slow cooling rate procedures. Additional requirements are included 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 steel flux 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.