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a neat way to melt a small amount of steel, like you may want to cast a small part for a gun. What you do is heat a small piece of high carbon steel to the ignition point 1400 F using a oxy acy torch. When you reach 1400 F you turn off the gas. Now the pure oxygen heats the steel up to 3000 F ready to pour the mold. You use a small wedge of Al to deoxidize the steel. In this process the steel goes from a high carbon composition to a medium carbon content