A method of producing low cost high thermal conductivity graphitic foils includes the steps of providing a plurality of partially purified waste flakes formed during iron smelting, and compacting the plurality of waste flakes into a flexible foil material. A thermally conductive foil includes a plurality of partially purified pressed waste flakes derived from iron smelting, the foil having trace impurities characteristic of formation during iron smelting.
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 RESEARCH OR DEVELOPMENT
 The United States Government has rights in this invention pursuant to Contract No. DE-AC05-00OR22725 between the United States Department of Energy and UT-Battelle, LLC.