Why would I want to you ask? The company I work for tosses large quantities of this rod because it is no good to use anymore due to policies. Throw them in a rod oven for a few hours and their right as rain. I have an AC stick welder at home, no dc.
by the AWS class definition, Exxx8 electrodes are low hydrogen, iron powder and AC or DC capable.
The Atom Arc 7018-M is a 'variant' of Atom Arc 7018 made/certified to meet additional MIL-spec requirements of MIL-E-0022200/10 for mechanical properties, coating moisture and diffusible hydrogen content.
Rebake is usually 700F for one hour, storage is 225-300F. Right from the ESAB Covered Electrodes Data Book, page 27.