The Effectiveness of the Carburizing Process on ST 42 Steel With Variations of Donor Media

Carburizing is a process of adding carbon content in steel by using solid media. This study aims to determine the effectiveness carburizing on hardness and depth diffusion ST 42 with variety donor Meanwhile, media used were teak wood charcoal, coconut shell graphite. The results this are highest level namely 815.39 HV, charcoal 715.5 lowest graphite at 343.975 HV. While average was 0.0133 µ, 0.0085 0.00416 µ. shows that there differences value three types process, so it can be concluded type also affect itself.