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Automotive Value Chain
Select a step where Air Liquide intervenes in your value chain.


Carburizing is the most important surface hardening process. Carbon is brought to the surface of steel components and diffused to increase tensile strength and hardness. Atmospheric carburizing is for a large number of parts from compressors to valves or gear boxes.

The ALNAT™ solution offers you an active and reproducible heat treatment under nitrogen and methanol. Either in a batch or in a continuous furnace, the methanol is cracked and represents the carbon agent, which is sprayed with nitrogen in the hot zone of the furnace, around 900°C for carburizing.