What is not a characteristic of a good welding electrode?

A good welding electrode plays a crucial role in the quality and integrity of the weld. Non-conductive properties are not desirable in a welding electrode because, by definition, the electrode must conduct electricity to create an arc between itself and the base metal. This arc is essential for the melting of both the electrode and the base metal, allowing them to fuse properly.

In contrast, high tensile strength is important because it ensures the weld can withstand significant stress and loads without breaking. Compatibility with base metals is vital as it ensures that the electrode will bond well with the materials being welded, providing a strong and durable weld. High ductility is also a key characteristic, as it allows the welded joint to absorb energy and undergo deformation without fracturing, which is particularly important in applications that experience dynamic loads or stress.

Therefore, non-conductive properties do not align with the fundamental function of welding electrodes, making it clear why this characteristic is not considered desirable.