Which electrode last numbers run on Direct Current Positive (DC+)?

The last numbers of electrodes that operate effectively on Direct Current Positive (DC+) are indeed 5 and 0. In welding, the polarity of the electric current plays a crucial role in the melting characteristics and heat distribution involved in the welding process.

Electrodes with these last numbers, such as those under the E7015, E7016, E7024, and E6010, are specifically designed for DC+ applications. When using DC+, the electrode acts as the negative terminal, which leads to a concentrated arc—this is beneficial for penetrating thicker materials and achieving better fusion.

In contrast, other electrode groups, such as those indicated by the numbers 3, 4, 7, 8, 6, and 1, do not specifically align with the common usage for DC+, highlighting the importance of understanding how different types of electrodes behave under various current polarities. Each electrode classification relates directly to its intended application and its performance in different welding scenarios. Knowing these details is vital for ensuring proper welding techniques and achieving optimal results in structural applications.