This research has compared the mechanical properties of medium carbon Steel that is not heat treated and heat normalizing, heat treated, quenching with water and silicone oil medium at a temperature of 85(f C in of 2.5 hours. From the results of hardness testing of medium carbon Steel, which heat treated the average hardness values (VHN) is increased, amounling 9.067% after normalizing, quenchi…
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