Specialist in the Heat Treatment of
Ferrous and Non-Ferrous Metals

Hardening

This process is carried out in a protective atmosphere to prevent decarburisation by heating the parts to between 820۫˚c
and 910۫˚c and quenching in oil. The temperature quenched from will be determined by the steel specification.

Tempering

This process is carried out by re heating the parts to between 200۫˚c and 720۫˚c to obtain the strength required for the use
of the parts. This temperature will be determined by the steel specification and the strength required.

Carbon Restoration

This is carried out during the hardening process by ensuring the furnace atmosphere carbon content is at a level to restore
any loss of carbon from the surface of the parts to carbon content throughout the parts.

Case Hardening

This again is carried out during the hardening process by ensuring the furnace atmosphere carbon content is in excess of
the carbon content of the parts resulting in a hard wearing surface layer much harder than the core of the parts. The depth
of this layer is determined by the time parts are exposed to the furnace atmosphere.

Carbo-Nitriding

As case hardening with the addition of ammonia gas which at hardening temperatures !Cracks! Into nitrogen and hydrogen.
The nitrogen is in a form which penetrates the surface of the parts greatly increasing the hardness of the case.

Stress Relieving

This is carried out by heating the parts to a pre-determined temperature below 720۫˚c without protective atmosphere and
allowed to cool in air.

Ferrous Metals

Alloy Steels
Carbon Steels

Fastners M2 - M42  up to 320mm long

Presswork - CS40 - CS70

300 Tons per week