1. Alloy 58N, serially produced and used for manufacturing precision scales, is highly contaminated with nonmetallic inclusions, most of which are titanium nitrides and aluminum oxides. These inclusions make it difficult to obtain a high-quality mirror surface on scales, due to which the accuracy of precision machine tools decreases. 2. The OIF+EBR and OIF+PAR melting procedures ensure not only a substantial reduction of the total quantity of inclusions but also a lack of large inclusions (over 7.5μ). 3. Both procedures can be recommended for commercial production of alloy 58N. In terms of the total volume of inclusions, the EBR procedure is preferable. However, PAR is more promising to obtain the desired inclusions and high dispersity of the inclusions. The advantage of the latter procedure (as compared with EBR) is the lower concentration of such elements as carbon and silicon, which affect the dimensional stability of parts manufactured from this alloy.