Abstract
The material of the container must not absorb the gas used for the special carbonitriding of steels in view of both the efficiency of the gascarbonitriding and the life of the container. In this paper the protecting power against the gas of the electro-plated steels, calo-rized steels and the various alloy cast irons were examined. It was found that the mild steel was calorized and then oxidized fully in air, and the iron alloyed with 10% Si and 1% Al or with 10% Si, 1% Al and 10% Co was the most protective against the gas.
