What does the last digit in the electrode number designate?

The last digit in the electrode number designates the special characteristics of the electrode. This convention is important because it provides critical information about how the electrode should be used and what types of applications it is suited for. For instance, in the American Welding Society (AWS) classification system, the last digit indicates properties such as the type of coating, whether the electrode is suitable for welding in a particular position, or if it holds certain performance attributes that could enhance welding quality under specific conditions.

Understanding this designation helps welders select the right electrode for their specific needs, ensuring better weld integrity, performance, and overall success in their welding projects.