Thermochemical treatments like plasma nitriding or surface carburizing are commonly used to enhance surface hardness of steel components. An important difference between these treatments is the temperature at which they are carried out. In the present work surface carburizing was carried out following a recently reported non-isothermal Low Pressure Carburising treatment. A comparison of the characteristics of, both, the bulk and surface microstructure of the PM steel alternatively subjected to LPC or Plasma Nitriding, as well as, of the surface hardness and case thickness was carried out. Clearly the combination of the LPC process with gas quenching gives an additional improvement. Tests were carried out using industrially processed components aimed at an application demanding high wear resistance. Microstructures were observed by optical and electron microscopy. The microhardness profiles obtained in both cases were also obtained.