en Research Paper Research Paper This study is focused on the effects of electroslag remelting by prefused slag (CaO, Al2O3, and CaF2) on macrostructure and reduction of inclusions in the medical grad of 316LC (316LVM) stainless steel. Results showed that in order to obtain uniform ingot structures during electroslag remelting, the shape and depth of the molten pool should be carefully controlled. High melting rates lead to deeper pool depths and interior radial solidification characteristics. Furthermore, decrease in the melting rate caused more reduction of non-metallic inclusions. In practice, large shrinkage cavities formed during the conventional casting process in the primary ingots were the cause of the fluctuation in the melting rate, pool depth and extension of equiaxal crystals zone ultra clean steel, electroslag remelting, prefused slag, vertical solidification, radial solidification and 316LVM 11 17 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-3-186&slc_lang=en&sid=1 S. Ahmadi sh.ahmadi@modares.ac.ir 180031947532846002661 180031947532846002661 Yes Bio-materials group, Materials & Bio-materials research Center, Tehran, Iran H.R. Shahverdi 180031947532846002662 180031947532846002662 No Department of Materials Science, Faculty of Engineering, Tarbiat Modares University, Tehran, Iran H. Arabi 180031947532846002663 180031947532846002663 No Center of Excellence for Advanced Materials and Processing (CEAMP), School of Metallurgy and Materials Engineering, Iran university of Science & Technology , Tehran, Iran