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Benefits of Heat Treating Duplex Stainless Steel

Heat Treating Duplex Stainless Steel

Duplex stainless steel is a type of steel alloy that is composed of two phases, austenite and ferrite. This combination gives duplex stainless steel its unique properties, such as higher strength and corrosion resistance. Heat-treating duplex stainless steel provides even more advantages, including chloride resistance, magnetic characteristics, improved corrosion resistance, and the ability to use in seawater applications. To understand how heat treatment enhances these properties of duplex stainless steel, let’s take a closer look at each one.

Chloride Resistance

Heat treatment increases the chloride content in the ferrite phase of duplex stainless steels. This ensures optimal performance in applications where chloride ions are present. It also makes the material more resistant to pitting and crevice corrosion caused by exposure to saltwater environments.

Magnetic Characteristics

Heat-treatable duplex stainless steels have a higher magnetic permeability than other materials, making them ideal for applications requiring magnetism or electrical conductivity. The magnetic properties can be further enhanced with additional treatments such as annealing or stress relieving.

Improved Corrosion Resistance

Heat-treatable duplex stainless steels have improved resistance to both general and localized corrosion when compared to other materials such as carbon steels or aluminum alloys. This increased protection allows for longer product life in harsh environments, which can lead to cost savings over time.

Seawater Applications

Heat-treating duplex stainless steel makes it suitable for use in seawater applications due to its superior corrosion resistance. It is also capable of withstanding high temperatures without becoming brittle or prone to cracking, as other materials might be under similar conditions. Additionally, its magnetic properties make it ideal for underwater sensors and other devices that need to detect changes in the environment below the surface of the water.


Heat-treating duplex stainless steel offers many benefits that can improve your application’s performance while also saving you money over time due to its improved durability and corrosion resistance. Its higher strength and magnetic characteristics make it suitable for many different uses, including those in marine environments where seawater may be present. With proper heat treatment processes such as annealing or stress relieving, you can ensure your duplex stainless steel will perform optimally no matter what environment it’s used in!

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