Case Hardening

Case Hardening is a heat treatment process that we use to produce a surface which is resistant to wear. It also maintains the toughness and strength of the core material. It is applied to low carbon steel parts after machining, and can be used for high alloy steel bearings, gears, and other components. Case hardening techniques we employ include:


This process diffuses nitrogen and carbon into ferrous alloys at sub-critical temperatures. The resultant hardened surface shows increased resistance to wear, corrosion, and fatigue.


During this process we introduce carbon and nitrogen into the surface of a solid ferrous alloy. The alloy is heated in contact with a gaseous carbonaceous material and ammonia, and is then quenched at a specific rate in order to achieve the desired properties of increased surface hardness and strength.

Ferritic Nitrocarburizing

Nitrogen and carbon are diffused into ferrous alloys at sub-critical temperatures during a salt bath. The resulting surface harder, and it also demonstrates increased resistance to corrosion, wear, and fatigue.


We can diffuse nitrogen into the surface layers of low carbon steels, other metals, and certain alloys for the purpose of improving wear resistance and surface hardness.

Gas Nitriding

Here we heat ferrous alloys, metals or non-ferrous alloys in an atmosphere of ammonia. This allows us to induce absorption of nitrogen onto the surface in order to harden the material without necessitating a quenching process.

Short Cycle Nitriding

This shortens the time requirement by producing a nitrided case consisting of two regions.