Stainless steel hardening

Machine parts used to produce and process chemicals, food, and plastics are typically made from stainless steel, suffering from corrosion or wear. Stainless steel hardening improves corrosion resistance and wear resistance in all stainless steel materials. The technique has two variants: one based on chromium diffusion, the other on hard inchromizing.

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Stainless steel hardening with chrome diffusion

We use chrome diffusion for hardening stainless steel materials that were not manufactured to be sufficiently corrosion-resistant. Inchromizing creates a surface with 50% chromium. The hardness of the stainless steel increases to as many as 1100 Micro-Vickers, which greatly improves wear resistance. Examples of products suitable for this treatment are pipes, sieve elements, and axle plungers. 



Characteristics of stainless steel hardening using chrome diffusion

  • Layer depth: 10-40 µm
  • Temperature resistance up to 900°C
  • Surface hardness: ± 1100 Micro-Vickers
  • Chrome surface content: ± 50-53%
  • Reduces overall costs


  • Elastic and highly malleable
  • Increases corrosion resistance
  • Improves wear resistance
  • Standard maximum dimensions: 3200 x 2000 x 900 mm
  • Other dimensions with a maximum length of 9000 mm on request

Stainless steel hardening with hard inchromizing

Is wear or cold welding causing problems, while the corrosion resistance remains intact? Then, the best technique is hard inchromizing, ensuring a very hard-wearing and wear-resistant surface while maintaining corrosion resistance. There is also hardly any dimensioning in this unique process. This surface technology is used in all industries, including automotive. We often use this technique to treat pipes, control valves and other valves, pumps, machine parts for lead-free soldering, and turbo chargers.



Characteristics of stainless steel hardening using hard inchromizing

  • Layer depth: 5-20 µm
  • Temperature resistance: up to 900°C.
  • Surface hardness: ± 2000 Micro-Vickers
  • Reduces overall costs
  • Elastic and highly malleable
  • Low coefficient of friction
  • Improves wear resistance
  • Retains corrosion resistance
  • Standard maximum dimensions: Austenitic steel and nickel base 1500 x 500 x 500 mm / 900 x 600 x 600 mm, other stainless steel types with maximum lengths of up to 9000 mm on request

Material analysis

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Our work starts with research. From a straightforward material analysis to a more complex damage investigation. At our lab, almost anything is possible.


For the aluminium and brass-processing industries, we can increase the wear resistance of materials through vanadium diffusion.


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If corrosion resistance is not an issue, this thermal-chemical surface treatment protects almost all ferrous metals against wear.


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