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Casting Treatments / Finishes

Metals in their cast form do not have the mechanical properties that an engineer may require.

Properties such as strength, toughness, ductibility, hardness and wear resistance can
all be improved by one of a number of types of heat treatment.

All metal parts can be supplied in various conditions

Heat Treated
Shot Blasted
Painted, including Powder Coating
Electro Polished
Chrome Plated
Zinc Plated

Machined
Assembled
X-Rayed
Crack Detected
Ultra Sonic Tested

Plus dimensional, mechanical and chemical reports.

More information about heat treatment of metals

Hardening – This is achieved by heating the metal to a certain temperature and then rapidly cooling in either water, brine oil, molten salts or air.

Annealing – This is generally used to reduce hardness or improve toughness. The metal is heated to a certain temperature in a furnace or container full of an inert gas (e.g nitrogen). The furnace is then cooled very slowly ie 100C per hour.

Normalising – The process is to ensure that the metal is not too soft. Metal is heated to 950ºc t0 1050º and then cooled in air.

Tempering – Hardened steels require a Temper to reduce brittleness, increase ductility and toughness. Metal is heated to 400ºC and cooled slowly. Temperatures will depend on the specification and the Mechanical requirements.

This list of heat treatments is only the most common and there are others. Generally, the temperatures
of the treatments is governed by the percentage of Carbon in the metal.

Send us a technical drawing of what you require: