FIELD: ferrous metallurgy, mechanical engineering, including devices determining steel grade and quality of heat treatment. SUBSTANCE: device has power supply, open-circuit magnetic cores, magnetizing and measuring coils, measuring unit incorporating microammeter. Steel specimen under inspection closes air gap between magnetic-circuit cores. Cores have V-shaped projections at 90 deg. and slit of double-step symmetrical shape in bottom part of V-shaped slot. EFFECT: improved design, enlarged functional capabilities. 2 cl, 2 dwg, 1 tbl
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