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For newbies, the use of different welding electrodes can be sometimes confusing, so let's talk about this welding electrodes, what to use in general, what's best for penetration and possible the right sequence during the welding process. Here I will discuss the usual and available rods that I have in stock being only a hobby welder, like the E6011, E6013, E7018 and E7024. I know the pros or the serious fabricators here surely know this already and probably used other types of welding electrode possibly the likes of E6010, E6012, E6022, E6027, E7010 E7014, E7018, E7022, and others, etc etc.E6011 Welding Electrode :
E6011 ELECTRODES ----- This type of electrode can be used with an AC or DC currents, but ideal for use on AC welders. It works well on dirty,rusty or painted metals. This can also be used in all kinds of welding positions. Amperage for this type of welding electrode is from 110 amps to 180 amps. This rods are usually used for root passes.
WIPWELD and SOUDOWELD 1/8" diam. welding electrodes.E6013 Welding Electrodes :
E6013 ELECTRODES ----- This type of welding electrodes can be used with an AC or DC currents. This is what I use for general repairs for light thickness fabrication. It produces a medium penetrating weld but with a superior weld bead appearance. The usual amperage setting for this kind of welding rods is 75 amps to 140 amps. Usually used for general welding and capping.
These are the E6013s 3/32 rods from NIHONWELD, above and BESTWELD, below.
And these are the E6013s 1/8 rods from APOLLO, above and WIPCORD, below.E7018 Welding Electrodes :
E7018 ELECTRODES ----- DC TYPE WELDING ELECTRODE-- Designed mainly for DC welders. It produces a high quality welds for mild steel, and ideal for carbon steel where cracking is a concern. This electrode can produce welds of X-RAY quality but with medium penetration. This type of welding rods should be kept in a sealed container or an electrode oven when not in use. Usually this type of welding electrodes are used for hot passes. And the usual amperage setting ranges from 120 amps to 180amps or more.
------ AC TYPE WELDING ELECTRODE -- Designed for AC welder operation, preferred for its high purity and crack resistant welds on mild and carbon steels. This rod is also known as a low hydrogen electrode. This kind of electrode must be kept dry at all times but if it gets wet, it must be dried in an ELECTRODE OVEN for at least 30 minutes before use.
This type of welding electrodes, the DC and AC are good for hot passes.
These are the two types of E7018 rods, the DC and AC welding electrodes.E7024 Welding Electrodes :
E7024 ELECTRODES ----- Known as the drag rod, is designed for fast-production mild steel welding. It can be used for DC as well as AC current, it welds satisfactorily on horizontal position but best for flat position. Produces less weld spatters during weld applications due to the high percentage of iron powder in the flux. And usual amperage setting varies from 115 amps to 180 amps.
These rods are much thicker in flux covering and longer than the ordinary rods like the E6013 and others.
This image is just a comparison in terms of diameter between a 3/32" rod, the 1/8" 6013 and the 1/8" 7024.