In this research, melt decontamination experiment by laboratory scale induction melting of Co-60, Cs-137, Mn-54, and Cr-51 radioactively contaminated metal specimens were performed. By using AHP decision making strategy, induction melting was chosen for the best melting process for melt decontamination. Various types of slag composition originally from steel industries were used for a base slag. Due to its characteristics, simulated metal specimens were used for melting experiment. Co and Cr were plated on the top of the specimen. Also Co, Cs, and Mn were coated as a form of oxide on the top of the metal specimen. From the experimental results, it is found out that plated Co were captured upto 4% at the slag and oxide coated Co were capture upto 10.4% to the slag. Cr was captured at the slag upto 20%, Mn was captured at the slag upto 70%, and Cs was captured at the slag upto 29%. It is concluded that the plated Co specimen is simulating neuron-activated metal and found out it is difficult to take Co out of melt as an oxide form. In case of Co oxide coated specimen, it is already as a form of Co oxide so melting temperature is relatively lower than metal Co so could easily be captured to the slag. It can be concluded that a slag composition SiO2(50)-CaO(30)-Al2O3(20) performed well and further research on adding oxygen to the melt to improve Co capture on the slag is needed.