okay that's something to consider
so i followed up on the heat transfer properties, good news!
most common mild steel mig wires, like AWS A5.18 Class ER70S-6, the carbon content is so low that you will be virtually matched in both heat conductivity and capacity to typical cast iron.
only if the carbon content is increased beyond 0.5% do the thermal properties of steel go down hill fast
cast vs mild steel at <0.15% carbon
55 vs 54 W/m*K
456 vs 465 J/Kg*K
now would the friction properties be similar? and if there were voids with slag, how would that change the situation?
-s
