Special Processes

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S3P Special Processes for Stainless Steel: Kolsterising® and Nivox Technology®

S3P special processes for stainless steel, including Kolsterising® and Nivox®, represent innovative surface hardening solutions for austenitic stainless steels, nickel-based alloys and cobalt-chrome alloys. These technologies improve wear resistance and surface hardness without compromising corrosion resistance.

The Benefits of Special Processes Treatments

S3P processes offer numerous benefits for stainless steel:

  • Increased surface hardness up to 900-1300 HV0.05, depending on the base material.
  • Maintenance of the corrosion resistance of the treated materials.
  • Dimensional and chromatic stability of the treated pieces.
  • No risk of delamination or brittleness of the material.
  • Unaltered paramagnetic properties for austenitic stainless steels.
  • Increased resistance to wear, abrasion and cavitation.

Unlike traditional coatings, S3P treatments involve the diffusion of carbon and/or nitrogen at low temperature, without the formation of chromium precipitation, thus avoiding the loss of corrosion resistance.

Applications of S3P Treatments

S3P processes are ideal for components subject to heavy wear and abrasion, including:

  • Pumps, valves and fittings for the transport of industrial fluids
  • Fasteners with high corrosion resistance, easy to disassemble
  • Components for marine environments, resistant to scratches, wear and corrosion

Materials Treatable with S3P Processes

S3P treatments can be applied to a wide range of materials:

Stainless steel

  • Austenitic: AISI 304, 304L, 316, 316L
  • Duplex: AISI 430, 440
  • Precipitation hardened: PH 17-4, PH 13-8 Mo

Nickel-Based Alloys

  • Hastelloy®
  • Inconel®

S3P Technologies: Tailor-made Solutions for Every Need

The S3P A® and Kolsterising® processes are particularly suitable for austenitic stainless steels, duplex and nickel alloys, while the S3P M processes are specific for martensitic and precipitation-hardened steels.

Unlike other surface treatments, S3P processes do not require additional processing and do not alter the chemical and mechanical properties of the base material. This allows for hard, wear-resistant surfaces that are free of defects such as cracks or chips, ensuring a longer service life.

Find out how S3P treatments can improve the performance of your components! Contact us now for an offer!