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<p>The recent development of rustless iron--a stainless steel in which the carbon is largely eliminated--has emphasized the need of low-carbon ferrochromium, A number of patents claiing various methods of producing low-carbon ferrochromium, or of decarburizing high-carbon ferrochromium, have been granted. Among the methods proposed has been decarburization by means of hydrogen. Some preliminary tests of this method have been carried out on an 8% carbon ferrochromium. The carbon content of powdered ferrochromium was slowly reduced by heating in dry hydrogen at temperatures between 1100 and 1350 degrees Celsius; that is, below the melting point of the alloy. The decarburization was much more rapid when hydrogen was bubbled through molten ferrochromium. Patents have been granted which cover the decar
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