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I've never come across an 8013 or even heard of these being produced. With the exception that I missed something along the way, most likely these are in reality "8018" or "6013" with one of the numbers not printed correctly. (just a possibility) If they are actually an 8013, that means 80,000# tensile strength, all position, coating is high titania & potassium. If they are an "8018" they are also all position with the coating being iron powder, low hydrogen, potassium. In the designation of stick electrodes, the first two digits of a four digit number or the first three digits of a five digit number code are the tensile strength in thousands of PSI of the weld bead. The third digit indicates welding position the rod may be used in: xx1x: all position
xx2x: flat or horizontal
xx4x: flat, horizontal, overhead, vertical down. The fourth digit indicates power supply and or covering composition. Occasionally a suffix letter, number or combination may be used on electrodes such as "E12018-B2" These vary from mfg to mfg so you should contact the mfg for specific data on these type electrodes. Hope this helps. Mark Kw
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