What does the suffix "-1" in electrode designations indicate?

The suffix "-1" in electrode designations indicates improved impact properties. In welding, the classification system used for electrodes includes various designators that provide important information about their performance characteristics. The inclusion of "-1" signifies that the electrode has been formulated or processed to enhance its ability to withstand impact loads, which is particularly crucial in applications where the welded joints may be subjected to dynamic or shock loading conditions.

This enhanced impact property is vital for maintaining the integrity and safety of welds in structural applications, particularly in colder temperatures where brittleness can be a significant concern. The designator helps welders and engineers select electrodes that are best suited for specific environmental and mechanical demands. The alternative answer options do not directly relate to the meaning of the suffix "-1" in the context of electrode classification, focusing instead on other properties that do not specifically describe the impact characteristics conveyed by that designation.