If a welding electrode has the following identifying number "E7015", what does the "70" represent?

In the context of welding electrodes, the "E7015" designation follows a specific classification as defined by the American Welding Society (AWS). The "70" in this identifier indicates the minimum tensile strength of the electrode. Specifically, it means that the electrode is rated for a minimum tensile strength of 70,000 psi. This tensile strength is critical as it provides information on how much pulling force the weld can withstand before it fails, which is a key factor when determining the suitability of the electrode for different welding applications.

Understanding this is essential for ensuring that the welding process is executed with the appropriate materials for the intended joint strength and application, particularly in structural and load-bearing scenarios. The value reflects a standard measure used in the industry to convey the strength characteristics of welding electrodes, aiding welders in selecting the right electrode for specific jobs based on their mechanical properties.