Nitriding & Nitrocarburising Treatments

Gaseous nitriding/nitro-carburising can be performed on a wide range of steels to provide a very hard surface layer.

When ammonia is heated to temperatures of around 500-560 degrees centigrade it dissociates into its components of hydrogen and nitrogen if a catalyst is present. In nitriding, steel is the catalyst.

In simple terms the result is a nitrogen rich layer at the surface of steel which can be, dependant on the material treated, up to 1100 Hv.

One of the great advantages that nitriding has over most other forms of case hardening is the minimum amount, and in some instances, total lack of distortion that is produced by this low temperature treatment.

In common with conventional carburizing treatments, nitrided components can have any areas not requiring treatment masked off. This is available for all treatment listed below.

Size Ranges available are:

  • Nitriding
  • 3835mm long x 406mm dia
  • 3048mm long x 508mm dia
  • 1600mm long x 1219mm wide X 600mm deep
  • 1219mm long x 838mm wide X 435mm deep

Nitrocarburising

  • 1067mm long x 254mm dia
  • 456mm long x 406mm dia

Gaseous Nitriding – process time/case depth
A 55 hour treatment time will give a MINIMUM case depth of 0.4mm when applied to En40 or En41 material. For all other materials this same treatment will give a MAXIMUM case depth of 0.4mm
This process is available once per week, on Tuesday’s, please ensure all work is at the Windsor street site by 12.00 noon.

A 72 hour treatment time will give a MINIMUM case depth of 0.6mm when applied to En40 or En41 material.
This process is available once per week, on Friday’s, please ensure all work is at the Windsor street site by 12.00 noon.
For other materials this same treatment will give a MAXIMUM case depth of 0.6mm.

Gaseous Nitro-carburising – process time/case depth
A 12 hours treatment time will give a case depth of 0.15mm – 0.2mm.
This process is available 5 days per week, Monday through Friday, please ensure all work is at the Windsor street site by 12.00 noon.

Nitro-carburising of plain low carbon steels gives a very wear resistant though very thin case.

 

For further information on these treatments please download the data sheet from or feel free to contact us.