Yes it is. Glow plugs and some indoor crane style thingies just use the outsides to conduct electricity instead of wires, and they're made out of steel.
Almost all metals conduct, what are you going to use this information for any way?
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I should correct myself now I am more knowledgeable, all metals and carbon conduct.
they conduct both electricity and heat less good than say copper and aluminium but they do
It sure is.