RUBIG Heat Treatment


Maximum oven usable space: Ø 1.500 mm / 2.400 mm height
Maximum batch weight: 7.500 kg


Gas nitriding


Short process chain

Minimization of hard fine machining by the slightest distortions


Safety through reproducible processes


Further tribology- and corrosion-critical applications through the GASOX® process are possible


Optional KN control enables optimal reproducibility

In gas nitriding, nitrogen is provided in the form of ammonia gas. The process takes place in bell and pit type furnaces at temperatures of 500°C to 600°C. Due to the chemical decomposition of the ammonia on the component, the nitrogen diffuses into the surface and forms a diffusion and bonding coating.

Process duration and temperature have a direct influence on the result. Hardness, nitration or hardening depth and coating thicknesses can be influenced by targeted process control. The additional enrichment of the surface with carbon is referred to as nitrocarburizing. A subsequent oxidation can be carried out during the cooling process or separately.

Low to medium alloyed steels are nitridable, but no passivated metallic surfaces. Component cleaning before treatment is of the greatest importance.

necessary information

  • Material
  • Surface hardness
  • Nitriding hardness depth
  • Compound layer thickness
  • Oxide layer thickness
  • Possible pre-treatments
  • Should areas be protected (covered) before nitriding?
Gas nitriding


Short-term nitriding (nitrocarburizing)

Short-term nitriding + oxidizing

Normal nitriding

Long-term nitriding



If a nitriding layer is not sufficient on its own, subsequent oxidation (directly in the nitriding process or as a separate process) can further improve corrosion resistance and coefficient of friction.

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Gas nitriding


Suitable for:

Mechanical engineering, precision components, tool making, automotive industry, plastic injection molding technology, etc.

  • Low to medium alloyed steels are nitridable
Possible surface preparation for an optimal surface condition: 
  • Free of greases, oils, processing agents or drawing and casting skins as well as sanding slips (barrel finishing)
Industrial Furnaces

Our gas nitriding system


RUBIG's gas nitriding systems are the result of decades of experience and further developments. RUBIG Industrial Furnaces' GASCON Technology stands for highly efficient and advanced gas nitriding.

Gas Nitriding