Annealing Furnaces

Annealing involves heating steel to a specified temperature and then cooling at a very slow
and controlled rate. Find out more about the annealing processes.

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There are several furnace types to choose from based on the size of your operation, temperature and features needed for your product.

Nutec Bickley’s precision manufacturing and decades of knowledge ensure that your Aluminium annealing furnace will get the job done and stand the test of time.

Advantages of Annealing Ovens and Furnaces

  • Custom Designed Furnaces
  • Low Maintenance Refractory Systems
  • State of the Art Combustion Systems
  • Direct or Indirect Fired Systems
  • Integration of SCADA
  • Flexible Modular or Continuous Heat Treat Systems
  • Integrated Loading and Unloading
  • Controlled Cooling

Furnaces we manufacture for the annealing process

Roller hearth furnaces


Roller hearth ovens and furnaces are designed for batch process applications, and for indexing–continuous production.

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Pusher Furnaces


We design pusher furnaces for continuous–indexing production with indexing pusher mechanisms located outside of the furnace.

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Car Bottom Furnaces


We manufacture heavy duty car bottom furnaces in custom designs and dimensions. They have the ability to handle large/heavy loads.

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Box Furnaces


We provide box furnaces and ovens for temperatures ranging from 300ºF to 2,450ºF (150°C to 1,340°C) to perform a wide variety of process applications.

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Mesh Belt Furnaces


We review the individual product and process application, to determine the ideal choice of conveyor and the best air flow pattern system.

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Moving Hood Furnaces


Nutec Bickley provides heavy duty moving hood furnaces for the heat treatment process (normalizing, annealing, stress relieving and others) .

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Rotary Hearth Furnaces


Are an efficient method of heating product that can be loaded and unloaded from the same general area using manual means, dedicated machines or robotics.

Walking Beam Furnaces


We can supply walking beam furnaces and conveyors for industries such as forging, stress relief, and tube, rod and wire, etc.

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Iso Tunnel Furnaces


We manufacture continuous Iso-tunnel furnaces for temperatures up to 1,950ºF (1,065°C) in the tube, rod and wire industry.

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Screw Hearth Furnaces


Heat treatment systems have fully integrated hardening, quenching and tempering for high volume and continuous production up to 140,000 lbs/hr (~65 metric tons/hr).


Download our furnaces e-book covering all metals industry sectors!

Great temperature uniformity, performance and quality are some of the characteristics that make us the best designers and manufacturers of furnaces and ovens available in the market.


Value added by Nutec Bickley

Nutec Bickley is focused on understanding our customers' thermal equipment needs and working to supply the best equipment to meet those needs at the most competitive price.

By applying the latest proven technology, Nutec Bickley is able to provide innovative solutions that meet or exceed our customers' expectations in equipment quality, production efficiency and operational economy.

Industries and applications of Annealing Furnaces



Steel forging, automotive, aerospace, foundries, tube manufacturers, aluminum producers, steel bars and rods.



Furnaces are tailored to each customer’s needs for both ferrous and non-ferrous applications.

What is Annealing?

Annealing is a heat treatment process in which a material is heated to an elevated temperature and held for a set amount of time and then cooled with a controlled rate.

Stages of annealing furnaces:

  • Heating to required temperature
  • Holding (“soaking”) at constant temperature
  • Cooling

The time at the high temperature (soaking time) is long enough to allow the desired transformation to occur. Cooling is done slowly to avoid warping/cracking due to the thermal gradients and thermo elastic stresses within the metal piece.


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Purposes of annealing furnaces

  • Relieve internal
  • Increase ductility, toughness, softness
  • Produce specific


used to reverse the effects of workhardening (by recovery and recrystallization) and to increase ductility. Heating is usually limited to avoid excessive grain growth and oxidation.

Stress Relief Annealing

used to eliminate/minimize stresses arising from plastic deformation during machining, non-uniform cooling and phase transformations between phases with different densities. Stress relief annealing allows these stresses to relax. Annealing temperatures are relatively low so that useful effects of cold working are not eliminated.


is an annealing heat treatment just above the upper critical temperature to reduce the average grain sizes (of pearlite and proeutectoid phase) and make more uniform size distributions. After complete transformation to austenite (austenitizing) the treatment is completed by cooling to the required microstructure.

Full annealing

involves austenitizing and slow cooling (several hours). Produces coarse pearlite -large grains (and possible proeutectoid phase) that is relatively soft and ductile. Full annealing is used to soften pieces which have been hardened by plastic deformation, and which need to undergo subsequent machining/forming.


involves prolonged heating just below the eutectoid temperature, which results in the soft spheroidite structure. This achieves maximum softness needed in subsequent forming operations.



Purposes of annealing furnaces - Photo


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