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that these materials (C 1, C 2 and C 3 ) were chosen is because they are byproducts of the petrochemical industry, and so This paper reviews the mechanical and microthey are inexpensive. Moreover milling easily reduces the structural characteristics of hypoeutectoid steels average particle size. If these products are not used in obtained by powder technology, in which various applications, such as those described here, they would have carbonaceous petroleum products provide the carbon to be stored in controlled rubbish dumps. Therefore by constituent. These steels are compared with others of using them in this way, money that would otherwise be similar composition obtained from graphite.spent on disposal is being saved. PM/1037The graphite used is a commercial powder (ISMAF, Spain), with an average particle size of less than 50 mm.