Heat Services

Heat Services – Australia’s leading industry experts! Below are just some of the Heat Treatment services we provide.

Heat Tech pre heating
Pre- Heating

The application of heat to a metal component both prior to and continuously throughout welding. Many reasons give the need for Pre heating , including the reduction of residual stresses and to reduce hydrogen absorption during the welding process. The use of Heat Techs heat treatment units and the expertise of personnel ensure correct temperatures throughout welding. As well as ensuring maximum inter pass temperatures are not exceeded.

Heat Tech post weld
Post Weld Heat Treatment

Also referred to in the industry as stress relieving. The process of heating a component uniformly to a temperature whereby harmful residual stresses are effectively removed. Without PWHT, stress corrosion cracking and a shorter fatigue life are possible.
Dependent on the composition of the material these temperatures are generally in the range of 600°C – 700°C.
Heat Techs extensive range of equipment enables us to effectively apply PWHT in the most remote locations, to the most complex of components.

Heat Tech hydrogen
Hydrogen Bakeout/Post Heat

A process whereby Hydrogen, which can be absorbed by steel through the welding process or being in service in a Hydrocarbon atmosphere, is effectively removed from the component by heating to temperatures generally in the range of 350°C. Failure to follow this process can lead to hydrogen cracking.

Heat Tech normalizing

Performed to improve the overall structure and grain of the material and counter the effects of its prior processes. This is achieved by heating the component to a temperature in the range of 900°C and the rapidly cooling in still or slightly forced air.

Heat Tech Annealing

Carried out to soften the material which improves workability and ductility. Involves heating the material to temperatures above its critical transformation point and slow cooling.

Heat Tech refractory
Refractory Dry outs

Very slow heating following a scheduled curve allows for the effective removal of all mechanical and chemical water from the refractory without damaging the product. Most plant boilers do not have the capability to provide effective control which can cause significant spalling of the refractory and a shorter service life. Heat Techs Australasian refractories division can assist you with all your dry out requirements.