Boronizing - Titankote™B

What is Boronizing?
Boronizing (also known as boriding) is a thermo-chemical surface hardening process in which boron atoms are diffused into the surface of a work piece to form complex borides (i.e. – FeB/FeB2) with the base metal.  There is no mechanical interface between the complex borides and the substrate as this is a true diffusion process.  The resulting case layer has a hard, slippery surface capable of performing at higher temperatures than most surface treatments.  Practically any ferrous material can be boronized, as well as many Ni, Ti & Co alloys.  However, it is important to note, the higher the content of alloy elements, the slower the diffusion rate.

We are pleased to offer the boronizing process under the proprietary name Titankote™ B.






Coefficient of Friction



Complex Borides*


10-200 µm.**

1600-1900 HV***


* - The composition of the diffused layer will vary depending on the base material. For example, ferrous materials will form FeB/FeB2; nickel-based alloys will form Ni4B3/Ni2B/Ni3B; cobalt-based alloys form CoB/Co2B/Co3B; titanium-based alloys form TiB/TiB2.
**- The thickness/depth of the borided layer will vary depending on the base material. Ferrous materials will develop thicker layers; materials with a higher content of alloy elements will generally tend to produce thinner layers.
***- The micro-hardness of the diffused layer will vary depending on the base material. For example, FeB/FeB2 layers will have a micro-hardness in the range of 1600-1900 HV. Other elements, such as Ni, Ti and Co, will produce a different hardness range, some even higher than FeB/FeB2.

Features/Benefits of Titankote™B (Boronizing) Process:
  1. High hardness (1600-1900 HV in ferrous materials)
  2. High resistance to temperature (approx. 1200 ° F)
  3. Increases resistance to acids (especially Hydrochloric acid)
  4. Reduced coefficient of friction (0.4)
  5. Boronized layer can be polished to a high finish
  6. Reduced tendency to cold weld
  7. Suitable for a broad range of materials
  8. Boronized layer can be selectively applied
  9. Surface treatment can be uniformly applied to irregular shapes
  10. Heat treatable materials can be fully hardened after boronizing
  11. Uniform case depths of diffusion layers are controllable
Typical Applications for Boronizing:
Due to wear/performance benefits provided by the boronized layer, combined with the broad range of compatible substrates and the cost-effective nature of the process, boronizing is used successfully for general wear resistance of carbon steel components. Additionally, due to its temperature and wear resistance, boronizing is also a good choice for certain tooling applications.
Some typical applications for boronizing include:

  • Hot forging dies
  • Wire drawing dies
  • Extrusion dies
  • Straightening Rolls
  • Ingot molds

  • General Components
  • Nozzles
  • Plungers
  • Gears
  • Shafts
  • Rollers
    Oil & Gas Components
  • Production tubing
  • Valve components
  • Valve fittings
  • Metal seals
  • Coal/Oil burner nozzles

  • Miscellaneous
  • Turbine components
  • Pump impellers
  • Ball valves & seats
  • Shaft protection sleeve
  • Guide bars

Suitable Materials for the Boronizing Process:
The following materials are common materials for the boronizing process. This list is representational, but not all-inclusive: please contact us with questions regarding your specific application substrate.

    Ferrous Metals
  • Carbon steels
  • Low alloy steels
  • Tool steels (H13, D2, etc.)
  • Stainless steels
  • Gray & ductile cast iron
    Non-Ferrous Metals
  • Tantalum
  • Titanium
  • Tungsten
  • Niobium
  • Molybdenum
    Ti & Ni Based Alloys
  • Ti-6Al-4V
  • Inconel 718
  • Inconel 625
  • Hastelloy
  • Nimonic 80A

Since every customer’s application is different, we invite you to contact Richter Precision Inc. for more information.  Our experienced sales representatives would be pleased to help you make the appropriate coating selection for your particular requirements.
Main Office: 1021 Commercial Ave. - P.O.Box 159 - East Petersburg, PA 17520 USA | Phone: (717) 560-9990 | Fax: (717) 560-8741 |
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