Ferritic Nitride Carburizing

Ferritic Nitrocarburizing (FNC) Heat Treating

FNC is an effective, economical case-hardening option for a broad range of parts, including:

  • Gears
  • Camshafts, Crankshafts, Hydraulic Cylinder Shafts
  • Clutch Plates. Transmission Plates, Yokes
  • Bearing Cages, Valve Guides
  • Axles, Wheel Spindles. Piston Rods
  • Firearms Components Like Barrels and Slides
  • Dies For Manufacturing Processes


  • Less distortion, used to as an alternative process to solve problems with size change and distortion associated with higher temperature treatments like carburizing or carbonitriding
  • Improved wear resistance and fatigue resistance, reduces the risk of galling, scuffing and scratching
  • Fends off corrosion, often selected to replace chrome plating due to environmental concerns with plating

The FNC Process:

Ferritic Nitrocarburizing also known as FNC, Nitemper or Tennifer is a case-hardening treatment with a hard-external case and a high surface hardness while preserving the strength and flexibility of the underlying metal technique. FNC is typically processed between a low temperature of 950℉ and 1300℉ that uses heat, nitrogen and carbon. The low processing temperatures are low enough to prevent problems often associated with higher temperatures, such as distortion, while still allowing carbon and nitrogen to dissolve through the surface of the steel.