ST37 Steel Carburization with Coconut Charcoal

The carburization process is a surface hardening where carbon added to the without changing core properties of material. This carried out at austenite temperature so that can diffuse into phase. only be done on low steels with content below 0.25%. research was conducted ST37 steel, which steel 0.18% content. type hardened carburizing 850 C long lasting time 1 hour, then it under moderate cooling outside air media. And change its mechanical from comparison initial specimen. highest hardness value occurs in coconut shell charcoal, but this not because enlarged grain size caused by heating temperatures 723⁰ C, thus reducing elongation Carburizing battery stone media more efficient than charcoal 723 C. Because temperature, absorbed carbons cannot as happened process, bind boundaries and their 4%. In microstructure nothing phase does reach temperature. However, there are differences between