Duplex Stainless Steel

Duplex stainless steel is a type of stainless steel that combines the desirable properties of both austenitic and ferritic stainless steel. It has good resistance to stress corrosion cracking and excellent weldability. Duplex stainless steel is commonly used in oil and gas exploration and production, architecture, and marine engineering.

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Acero Inoxidable 304
Acero Inoxidable


Duplex stainless steels have various grades: 2205, 2507, 2304, etc. It’s important to note that duplex stainless steel has different grades and variations, such as duplex 2205, duplex 2507, and others, each with its specific composition and properties.

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Chemical Properties (%)

2205 Stainless Steel:

C:≤0.07, N:≤0.01, Mo:≤0.8, Cr:≤25.7, Mn:≤0.2, S:≤0.07, P:≤0.012, Cu:≤0.2

2507 Stainless Steel:

C:≤0.03, Ni:≤6.00~8.00, Mo:3.00~5.00, Cr:24.00~26.00, N:0.24~0.32, Mn:≤2.00, S:≤0.02, P:≤0.035, Si:≤1.00

318L Stainless Steel:

C:≤0.03, Ni:≤11.00~14.00, Mo:2.00~3.00, Cr:18.00~20.00, Mn:≤2.00, S:≤0.03, P:≤0.045, Si:≤0.75

Pysical Properties

2205 Stainless Steel:

Tensile Strength [ksi (min)]: 90

Yield Strength [0.2% ksi (min)]: 65

Elongation (%): 25

Hardness (HB) : ≤217

2507 Stainless Steel:

Tensile Strength [ksi (min)]: 116

Yield Strength [0.2% ksi (min)]: 80

Elongation (%): 15

Hardness (HB) : 250 ~ 270

Available Processing

We have high-tech equipment for processing stainless coils and sheets/plates with skilled workers.

1. Cut to length

2. Despoiling and slitting

3. Grinding and brushing

4. Film protection

5. Etching

6. Embossing

7. Patina

8. Mirror or other finish

Foshan TOPSON Stainless Steel Co., Ltd

Common Applications

Duplex stainless steel offers various applications across various industries due to its unique combination of mechanical properties and corrosion resistance. Some typical applications of duplex stainless steel include:

♦ Oil and Gas Industry: It is employed in pipelines, subsea equipment, umbilicals, risers, and other components exposed to corrosive environments.
♦ Chemical Processing: It is used in equipment such as reactors, heat exchangers, tanks, pumps, and valves, where resistance to aggressive chemicals and high temperatures is required.
♦ Desalination and Water Treatment: Duplex stainless steel can withstand high chloride environments, making it ideal for heat exchangers, pipes, and pumps.
♦ Pulp and Paper Industry: It is used in digesters, bleach washers, evaporators, and other equipment where harsh chemicals and high temperatures are present.
♦ Architectural Applications: Duplex stainless steel is utilized in building facades, roofing, decorative elements, and structural components.
♦ Marine Engineering: The marine industry extensively employs duplex stainless steel for shipbuilding, offshore platforms, and marine equipment applications.
♦ Food Processing: It is used in food storage tanks, processing vessels, and conveyors.
♦ Structural Applications: Duplex stainless steel is used in bridges, buildings, storage tanks, and other load-bearing structures.

Frequently Asked Questions

Q1. Are you a factory, manufacturer or trader?

A1. Foshan TOPSON Stainless Steel Co., Ltd. is a professional stainless steel factory with nearly 15 years of experience in stainless steel production. All our goods are dispatched directly from the TOPSON mill.

Q2. How can you ensure the quality of your product?

A2. Our stainless steel sheets and coils have to go through TWO/THREE checks in the manufacturing process, including production, cutting sheets (If requested) and packing.

Related Products

200 series stainless steel sheet

200 Series Stainless Steel

200 series stainless steel is austenitic and non-magnetic. They offer good corrosion resistance, especially in indoor or mildly corrosive environments.

200 series stainless steel sheet

300 Series Stainless Steel

300 series stainless steel sheets are classified as austenitic and are hardenable only by cold working methods. These alloys are widely used in various industries and applications.

200 series stainless steel sheet

400 Series Stainless Steel

400 series stainless steel sheets are magnetic and offer excellent mechanical properties, commonly used in applications where strength and durability are crucial.

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