Creating A Better Company

An Overview Of Annealing Service And Its Importance

Metals are essential in different industries, including; construction, car assemblies, manufacturing factories, etc. These industries depend on metallic parts, tools, and machines for their operations. For the metals to work effectively, they undergo different heat treatment processes depending on their end-use. This article is an overview of annealing as one of the treatment processes and why it is important.

What is annealing?

Annealing is a heat treatment process that involves changing certain metals' mechanical and physical characteristics, making them softer and easier to use in various industrial processes. The treatment entails heating the metals to a temperature below their melting points. This makes the metals less hard and prevents them from causing wear and tear to machinery after cold-working processes such as bending and shearing. 

How is annealing done?

Annealing metals occurs in three stages: the recovery stage, the recrystallization stage, and the grain growth stage. The recovery stage involves placing the metallic alloy into a furnace or any other heating process softening it and releasing all its internal stresses. This stage aims at recovering the metal's physical properties such as electrical conductivity, thermal expansion, and internal energy. Recrystallization is a restorative process that entails heating a metallic material above crystallization temperatures but below its melting point. This stage replaces any destroyed or tampered crystal structure with new grains that will grow and be repossessed by the alloy without any residual stresses. Lastly, the new grains will fully develop at the grain growth stage. It happens at a specified cooling rate depending on the type of metal alloy. Completing the three annealing steps produces a softened metal for different industrial operations.

Application of annealing process

Annealing is essential in various applications like after-welding, machining, metal wire, and work-hardened materials. For instance, after welding, annealing helps handle residual stresses by developing uniform properties on the metal alloy. On the other hand, work-hardened materials like sheet metal require annealing services after various stamping processes. 

Why is annealing necessary?

Annealing is essential in industrial processes because of many reasons. First, it helps reduce residual stresses in machines, thus preventing cracks and mechanical complications. Examples of residual stress areas include large shock absorbers and contact engines on boats. Second, annealing helps minimize the impact of work hardening that happens during cold forming, drawing, and bending. Work hardening makes metals too brittle and hard to shape without breaking. Third, annealing makes it easier to machine a metallic material. It does that by reducing the metal's hardness. Soft and ductile metals are essential in motor vehicle assembly and plumbing industries.


Annealing is important as it helps improve the lifetime and durability of metal parts and tools in an industrial setting. Consult an annealing service provider to get highly ductile metallic parts that operate excellently under cold conditions with less residual stress.