Rare-Earth Oxide Dispersed Sintered Stainless Steels (REO-Steels)

Patent Status: 

Patent Filed

Indian Patent Applicaton No: 




Patent Category: 


A powder metallurgical process of producing a improved class of stainless steels with addition of controlled quantities of rare earth oxides additives.

Key Features: 

  • REO-dispersed steels exhibits an increase up to 90% hardness up to 15 % as compared to conventional steels.
  • A novel powder stainless steel [up to 10 wt% yttria Y203) is formulated using controlled using controlled quantities of rare earth oxides in ferrite stainless steel powder with modification in solid state and supersolidus sintering.
  • High hardness, wear resistance as well as superior corrosion resistance.


  • Automotive, chemical, and structural applications.

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