Rhondite

Rhonditic steels contain about 0.35 to 2.25 percent carbon by weight. They are formed by mixing a high carbon and low carbon steelcarbon steel, such that the mixture as a whole has the desired carbon content. The mixture is then heated to a temperature at which the high carbon steel will melt, but kept below the melting point of the low carbon steel (~2750 F). The mixture is slightly cooled then maintained for time sufficient for the carbon present to form fullerenes and fullerene chains (approximately 15 minutes), and finally allowed to cool to room temperature.