What does E7013 mean?

E7013 is a classification for a type of welding electrode used in arc welding, specifically for mild steel. The "E" indicates that it is an electrode, "70" signifies the minimum tensile strength of 70,000 psi, and "13" refers to the type of coating and its suitability for various positions. E7013 electrodes are known for their ease of use, good arc stability, and ability to produce smooth, clean welds, making them popular for general fabrication and repair work.