Nitrogen strongly affects mechanical propertiesof steel and therefore we may sometimes modify the variousprocesses for its content. Numerous studies based on theresults of chemical analysis of quenched samples werereported with a few exceptions of Hot Sievert method. Thetechnique always poses a risk of uncertainty whether the truecontent of nitrogen in liquid metal is measured or not.In this study vacuum remelting under relatively low pressurewas done to enhance gas phase mass transfer. Total pressureof the melt chamber was about 10-3Pa and electron beam heating was used.Mass spectroscopy was used for the direct observation of therate of denitrization. Nitrogen molecules or atoms weredetected by a mass spectrometer set above the melt.Continuous monitoring of the intensity of the fixed massnumber may reflect the transfer of nitrogen from the melt tothe vacuum. The results of the new and conventionaltechniques agree, both technique can be verified.
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