Gas Nitriding
Gas Nitriding is a thermochemical surface hardening process that diffuses nitrogen into the surface of steel components at controlled temperatures - typically between 490°C and 630°C in an ammonia-rich atmosphere. The result is a hard, wear-resistant surface layer with significantly improved fatigue life, corrosion resistance, and dimensional stability, all without the distortion associated with conventional hardening methods.
Our precision advantage
We specialise in achieving exceptional results with dimensional accuracy—maintaining post- process growth at less than 7 microns. This ensures your precision components retain their exact tolerances and geometry after treatment, eliminating the need for costly re-machining or rework.
Why choose Gas Nitriding?
Superior hardness
Exceptional surface hardness with minimal distortion to finished components
Extended service life
Greatly improved fatigue strength and wear resistance for longer component life
Corrosion resistance
Enhanced resistance to corrosive environments, ideal for demanding industrial applications.
Dimensional accuracy
Post process growth controlled to less than 7 microns no re-machining required.
Process specifications
| Case depth range | 0.030 mm-0.60mm |
| Post-process growth | <7 microns |
| Process atmosphere | AmmoniaNH3 |
| Process temperature | 490°C to 630°C |
Compatible steel grades
- H13
- EN41B
- 42CrMo4
- 31 CrMoV9
Industries served
- Automobile
- Non-automobile/General Engineering
- Defence
- Oil & Gas
Our gas nitriding facility handles components across a wide range of sizes and geometries. Whether you need case depths for light-duty wear applications or deeper diffusion layers for heavy-load conditions, we tailor process parameters to your exact material and performance requirements. Consult our team to discuss your specific component needs.