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About Duplex Steel S32205

Views: 4     Author: Wang     Publish Time: 2024-03-05      Origin: Site

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Description of UNS S32205

UNS S32205 is a two-phase, ferritic, austenitic stainless steel alloyed with chromium of 22%, molybdenuS32205m of 3%, and nickel of 5% to 6%. It is the most popular grade of duplex stainless steel and has a yield strength that is twice as high as that of austenitic stainless steel standard grades. It has excellent performance in the majority of caustic environments, high resistance to pitting and crevice corrosion, and good weldability.

UNS S32205 contains a higher nitrogen content, which provides additional safety protection to already strong surfaces. The presence of treated nitrogen provides an additional layer of protection against any corrosive compounds attacking and corroding the steel solution. This enhanced corrosion resistance gives UNS S32205 a slight but significant advantage over its closest cousins.

Characteristics of UNS S32205

UNS S32205 is a duplex stainless steel with a mixed austenitic—ferritic microstructure, comprising a granular structure characteristic of roughly 50% each of these distinct phases. It combines the high tensile (620 MPa) and yield (450N/mm2) strengths of ferritic grades with the exceptional corrosion resistance associated with austenitic types. While it is not as easily formed as full austenitic stainless steels, it boasts a ductility and toughness far superior to ferritic steels and can be readily formed into plates ranging from extremely thin (6 – 50 mm) to fairly thick (100 – 200 mm).

Duplex steels like UNS S32205 also have a lower alloying content than many other stainless steel grades. Its chief alloying elements are chromium (22.0 – 23.0%), nickel (4.5 – 6.5%), and molybdenum (3.0 – 3.5%), which contribute towards the material’s outstanding anti-corrosive properties and stress corrosion cracking (SSC) resistivity. This low alloy content and high formability make UNS S32205 the ideal material for cost and weight savings.

Processing methods and standards of UNS S32205

Heat Resistance

2205 Duplex Steel Material is remarkable for its superior heat resistance, it can be used in applications involving temperatures up to 300°C. This makes it a perfect choice for uses such as steam turbine parts, exhaust manifolds and petrochemical processing equipment. Its heat resistance is achieved through the balanced chemical composition of chromium, molybdenum, nitrogen and other elements. It also has a high tensile strength and good weldability, so its durability speaks for itself. Making 2205 Duplex Stainless Steel the right material solution for many critical components.


2205 Duplex Stainless Steel Machining is a complex and precise process that requires careful planning and attention to detail. While the correct tooling, setup, and feed rates are all important factors in achieving a successful outcome when machining 2205 duplex stainless steel, equally important is having the right series of cutting tools on hand to ensure the job is completed efficiently and accurately. Selecting the best combination of cutting tools from end mills, drills, countersinks, reamers and taps ensures not only a superior finish but also that longer tool life is achieved helping to save money in the long run. With its two-phase microstructure consisting of austenite and ferrite grains, it’s critical to understand how this type of stainless steel works with various cutting tools for optimal performance.

Heat Treatment

UNS S32205 Duplex Stainless Steel is frequently used in petrochemical and oil industry due to its superior resistance to high temperatures and corrosion. Heat treatment of this alloy can improve the product’s overall life-span, especially when it’s exposed to various environmental elements. It is important to pay attention to the whole process of heat treating this metal if you want optimal results. One particularly successful method involves first solution annealing at around 1130°C followed by rapid quenching. This process eliminates many inclusions and increases the strength of the steel while maintaining its thermal efficiency. Additionally, different processes such as forging and cold working can be used afterwards to alter the material’s ductility without compromising its strength or physical characteristics. By properly heat treating 2205 Duplex Stainless Steel, you ensure a robust component that can withstand a variety of environmental factors with ease.

Duplex Stainless Steel 2205 Pipes Specifications

SMLS& Welded

SMLS& Welded


Bar /Rod

Forging /Flange

BW Fittings




ASTM A276/A479

ASTM A182 F60


Application of UNS S32205

Duplex S32205 has more noteworthy yield strength when contrasted with standard austenitic steel evaluations, for example, Type 304, while as yet giving similar consumption safe execution. The steel likewise has a lower composite substance which majorly affects decreasing the creation expenses of the material. Cost is really the best advantage when considering Duplex Steel and this reality isn’t simply because of lower gracefully costs. Because of the material’s more noteworthy yield strength, Duplex offers the procurer the occasion to buy the material in diminished thicknesses without the need to settle on quality and execution. This makes steel an appealing suggestion surely.

2205 Duplex Stainless Steel is widely used in commercial and industrial applications because of its excellent strength, durability and corrosion resistance. This steel type finds its use as structural parts to components of ships, boats, well-drilling equipment, tanks, pressure vessels, valves and other piping systems. Moreover, it is also used for pump shafts and other severe corrosive environments. It is particularly suitable for many highly demanding saline water applications due to its excellent resistance to pitting and stress-corrosion cracking. In addition to these uses, it is also suitable for cryogenic temperatures and temperatures above 300°F. Its Duplex nature makes it a steel that can be easily formed into bankable shapes with low cost weldability compared to other stainless steels.

The cost and weight savings offered by UNS S32205 offer significant benefits for processing facilities and offshore infrastructures contending with corrosive elements. UNS S32205 steels are routinely used to fabricate pumps and valves in seawater applications, providing an exceptionally lightweight material with long-lasting resistance to seawater corrosion (chlorination, oxidation, etc.).

It is also routinely prescribed for processing applications as varied pulp mills, food processing, oil and gas piping, chemical processing, and more. Some UNS S32205 steels have also been used in emissions control components like flue gas desulfurization scrubbers, owing to the availability of thin plates with exceptional mechanical and chemical properties over extended service periods.

JN Alloy is a distributor and product manufacturer of stainless steel, duplex steel, and nickel.
Tel: +86 19339900211
Add: Stainless steel Market 289, Xinwu District , Wuxi, China
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