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High Temperature Gas Nitriding

High Temperature Gas Nitriding

High Temperature Gas Nitriding of stainless steels is a unique case hardening process for cavitation, wear, and pitting resistance.

High Temperature Gas Nitriding is carried out on stainless steel alloys at temperatures between 1050 and 1200°C (1925F- 2200°F). Like low temperature processes, it does not form surface nitrides, making it possible to maintain or even enhance a component’s corrosion resistance. The process also results in case hardness increases of 75-250HV.

High Temperature Gas Nitriding is commonly referred to as Solution Nitriding.

Primary Advantages:

  • Hard corrosion resistant layer
  • Effective case depth: 0.25-1.5mm (0.010-0.060inch)
  • Residual compressive stresses (increased fatigue life)
  • Simple process controled with nitrogen pressure and process time
  • Uniform nitrogen activity in holes and bores
  • Low environmental impact

Historical Uses:

  • Pump housings
  • Shafts
  • Gears
  • Impellers
  • Bearings
  • Valve components
  • Food processing components
  • Injectors

Compatible Materials:

  • Austinitic stainless steels (most 300 series)
  • Martensitic stainless steels (most 400 series)*
  • Many duplex stainless steels

*May require double hardening process for grain refinement