Heat Treatment

Heat Treatment

Radley Engineering has an on-site heat treatment facility with an experienced metallurgical team who employ heat treatment to a wide variety of equipment and materials. We offer the following services:

  • Stress Relief (on campus Furness facility)
  • Case Hardening
  • Hardening and Tempering
  • Normalising and Annealing

Stress Relief

Heat Treatment 2

Stress relief is the most commonly used form of heat treatment. It is used on metal products to reduce and redistribute the residual stresses in the product which are caused during the welding process. Stress relief reduces the risk of any dimensional changes in the remainder of the manufacturing process.

Case Hardening

Heat Treatment

Case hardening is the process used to harden the surface of steel. A thin layer of harden metal is formed on the surface, whilst the metal underneath remains soft. This combination of a hard surface and soft inside ensure the product remains relatively flexible and allows it to withstand high stress.  Case hardening is used on mild steels.

Hardening and Tempering

Heat treatment 1

Hardening is a heat treatment process used to increase the hardness of steels. Unlike case hardening, hardening is used on medium and high carbon steels.

Tempering is a low temperature heat treatment technique which is used to increase the level of toughness in the metal. It usually occurs following the hardening stage. During the hardening stage, the toughness of the metal is reduced. The tempering process involves heating a metal to below its critical point and then allowing it to cool.

Normalising and Annealing

Normalising is a heat treatment process which is used to counter the effects of previous processes that were carried out on the metal. It involves heating the steel and then cooling it in air.

Annealing is a heat treatment process used to alter the physical and chemical properties of a metal. The process of annealing increases ductility and reduces hardness, making the material more workable.  It involves heating the material to a specific temperature and then allowing it to cool slowly.

Talk to Radley Engineering Today to Discuss Your Heat Treatment Needs.


Pharma & Bio Pharma

Industrial Manufacturing

Oil and gas refinery

Oil & Gas

Power Generation

Power Generation & Utilities