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What is 2205 Stainless Steel Coil?
2205 stainless steel coil is a duplex stainless steel containing 22% chromium, 5% nickel, and 3% molybdenum, offering superior strength and excellent resistance to chloride corrosion, widely used in marine, offshore, and chemical processing industries.
2205 Stainless Steel Coil is a high-performance duplex stainless steel combining excellent mechanical strength with outstanding corrosion resistance. Compared with conventional austenitic grades such as 304 or 316, duplex 2205 provides higher yield strength, improved resistance to chloride stress corrosion cracking, and superior pitting resistance, making it widely used in marine engineering, chemical processing, offshore platforms, and desalination systems.
Manufactured according to international standards such as ASTM, EN, and JIS, 2205 stainless steel coils offer reliable performance in harsh environments. With balanced austenite and ferrite microstructure, the alloy delivers both high structural strength and excellent corrosion protection, making it an ideal material for industrial fabrication and heavy-duty applications.
Here is the more comprehensive list of equivalent grades for 2205 stainless steel coil, along with their respective countries/standards:
| AISI 2205 | United States |
|
UNS S31803/S32205 |
International standard |
| IS SUS 329J3L | Japan |
| DIN 1.4462 | Germany |
| EN 1.4462 | Europe |
| BS 318S13 | United Kingdom |
| NF Z3CND22-05Az | France |
| SS 2377 | Sweden |
|
UNE F.3411 |
Spain |
| SIS 2377 | Sweden |
| UNI X2CrNiMoN22-5-3 | Italy |
| GOST 03Ch22N5M3 | Russia |
| KS STS329J3L | South Korea |
| GB/T 022Cr22Ni5Mo3N | China |
2205 Stainless Steel Coil Specifications
| Parameter | Metric | Imperial |
|---|---|---|
| Thickness | 0.3 – 12 mm | 0.012 – 0.47 in |
| Width | 600 – 2000 mm | 23.6 – 78.7 in |
| Coil Weight | 3 – 15 tons | 6,600 – 33,000 lbs |
| Length | Custom | Custom |
| Surface Finish | 2B, BA, No.1, No.4, HL | - |
Chemical Composition of 2205 Stainless Steel
| Element | Content (%) |
|---|---|
| Chromium (Cr) | 21.0 – 23.0 |
| Nickel (Ni) | 4.5 – 6.5 |
| Molybdenum (Mo) | 2.5 – 3.5 |
| Nitrogen (N) | 0.08 – 0.20 |
| Carbon (C) | ≤0.03 |
| Manganese (Mn) | ≤2.0 |
| Silicon (Si) | ≤1.0 |
| Phosphorus (P) | ≤0.03 |
| Sulfur (S) | ≤0.02 |
Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength | ≥450 MPa |
| Tensile Strength | ≥620 MPa |
| Elongation | ≥25% |
| Hardness | ≤293 HB |
Compared with 304 stainless steel, duplex 2205 has approximately twice the yield strength.
Features of 2205 Stainless Steel Coil
1. Excellent Corrosion Resistance
Duplex 2205 offers strong resistance to pitting corrosion, crevice corrosion, and chloride stress corrosion cracking, making it ideal for aggressive environments.
2. High Mechanical Strength
Its yield strength is nearly double that of conventional austenitic stainless steels, allowing thinner materials while maintaining structural performance.
3. Superior Durability
The balanced ferritic-austenitic structure provides excellent fatigue resistance and long service life.
4. Good Weldability
2205 duplex stainless steel can be welded using common welding processes such as TIG, MIG, and arc welding.
5. Cost Efficiency
Because of its high strength, less material may be required in structural applications, reducing total project cost.
Products Applications
2205 duplex stainless steel coils are widely used in demanding industrial environments:
Oil and gas pipelines
Offshore platforms
Marine equipment
Chemical storage tanks
Heat exchangers
Desalination plants
Pressure vessels
Structural components
Product application case
- Chemical Processing Equipment:
2205 stainless steel is a duplex stainless steel that contains a combination of austenitic and ferritic stainless steels. It is a highly corrosion-resistant material that is commonly used in chemical processing equipment due to its excellent resistance to corrosion in a wide range of corrosive environments.
The chemical composition of SIS 2377 typically includes around 22% chromium, 5-6% nickel, 3% molybdenum, and 0.2-0.3% nitrogen. This combination of elements provides the material with superior corrosion resistance, high strength, and good weldability.
When used in chemical processing equipment, UNE F.3411 can be formed into a variety of shapes and sizes to meet the specific requirements of the application. The coils can be used to make tanks, pipes, valves, and other components that are exposed to corrosive chemicals.
Some common chemicals that 2205 stainless steel is resistant to include sulfuric acid, hydrochloric acid, and acetic acid. It is also resistant to chloride stress corrosion cracking, making it ideal for use in seawater and other chloride-rich environments.
- Oil and Gas Industry Equipment:
GOST 03Ch22N5M3 is a popular material for oil and gas industry equipment due to its high strength, excellent corrosion resistance, and good weldability. This material is commonly used in applications such as pipelines, offshore platforms, and subsea equipment.
The duplex structure of 2205 stainless steel provides superior strength compared to traditional austenitic stainless steels, making it ideal for use in demanding applications in the oil and gas industry. The high resistance to pitting and crevice corrosion also makes it suitable for use in environments containing chlorides, such as seawater.
One of the most common applications of UNS S31803/S32205 in the oil and gas industry is for pipelines. The material is often used in high-pressure pipelines due to its excellent strength and corrosion resistance. The material is also used for subsea equipment such as umbilicals, manifolds, and subsea valves, where corrosion resistance and strength are essential.
- Heat Exchangers:
GB/T 022Cr22Ni5Mo3N is a duplex stainless steel that is often used in heat exchangers due to its excellent corrosion resistance and high strength. Heat exchangers made from 2205 stainless steel coils are commonly used in a wide range of industries, including chemical processing, oil and gas, power generation, and marine applications.
The 2205 stainless steel coil is formed into a heat exchanger by welding the coils together to create a continuous tube. The tube is then placed into a shell and tube configuration, with the shell surrounding the tube and a fluid flowing through the tube to transfer heat to or from the fluid in the shell.
One of the key advantages of using 2205 stainless steel in heat exchangers is its resistance to corrosion, which helps to prolong the life of the heat exchanger and reduce maintenance costs. The high strength of the material also allows for the use of thinner walls, which can result in a more compact design that is easier to install.
When selecting a heat exchanger made from 2205 coils, it is important to consider the specific requirements of your application, including the operating temperature, pressure, and fluid compatibility. It is also important to work with a reputable manufacturer who can provide quality materials and ensure proper fabrication and testing to ensure the integrity and reliability of the heat exchanger.
- Pulp and Paper Industry Equipment:
KS STS329J3L are widely used in the pulp and paper industry due to their excellent corrosion resistance, high strength, and good weldability. This material is used in various equipment such as tanks, pipes, valves, and fittings, which are used in various stages of the pulp and paper manufacturing process.
One of the key advantages of using 2205 steel coils in the pulp and paper industry is its resistance to corrosion from the highly corrosive chemicals used in the pulp and paper manufacturing process. This material can withstand the harsh chemicals and high temperatures used in bleaching, cooking, and other processes without deteriorating or corroding, which helps to prolong the life of the equipment and reduce maintenance costs.
In addition to its corrosion resistance, the high strength of BS 318S13 allows for thinner walls and smaller equipment designs, which can help to reduce costs and save space. The good weldability of the material also makes it easier to fabricate and assemble equipment, which can help to reduce manufacturing time and costs.
- Desalination Plants:
2205 stainless steel coils are commonly used in desalination plants due to their excellent corrosion resistance, high strength, and good weldability. Desalination plants are used to remove salt and other minerals from seawater or brackish water to produce freshwater, and the equipment used in these plants is exposed to highly corrosive environments that can damage less resistant materials.
The high corrosion resistance of AISI 2205 makes it an ideal material for use in desalination plants, as it can withstand the highly saline and corrosive conditions present in the plant without corroding or deteriorating. This helps to prolong the life of the equipment and reduce maintenance costs.
In addition to its corrosion resistance, the high strength of 2205 stainless steel allows for thinner walls and smaller equipment designs, which can help to reduce costs and save space. The good weldability of the material also makes it easier to fabricate and assemble equipment, which can help to reduce manufacturing time and costs.
When selecting IS SUS 329J3L for desalination plants, it is important to work with a reputable supplier who can provide quality materials and ensure proper fabrication and testing to ensure the integrity and reliability of the equipment. It is also important to consider the specific requirements of your application, including the type of water being processed, temperature, pressure, and other factors that may impact the performance of the equipment.
Inspection & Quality Assurance
At Xi'an Dongmeng Group Co., Ltd, all 2205 stainless steel coils undergo strict inspection procedures before shipment:
PMI (Positive Material Identification)
Chemical Composition Analysis
Mechanical Property Testing
Surface Finish Inspection
Thickness & Width Tolerance Inspection
Flatness Inspection
Packing Verification
Third-Party Inspection Available (SGS / BV / TUV)
International standards such as ASTM A240 and EN 10088 are strictly followed during production and export processes.
Product Delivery Standards
Professional export packaging ensures safe transportation:
Waterproof paper wrapping
Wooden pallets or steel pallets
Steel strip reinforcement
Standard seaworthy export packaging
Delivery standards comply with international export logistics requirements, ensuring products arrive safely at destination ports.
Related Products
1. Duplex 2205 Stainless Steel Plate
Overview:
Duplex 2205 stainless steel plates combine high strength and excellent corrosion resistance. They are widely used in pressure vessels, chemical tanks, and structural applications where high durability and resistance to chloride stress corrosion cracking are required.
Key Features:
Balanced austenitic-ferritic microstructure
Excellent pitting and crevice corrosion resistance
High yield strength (~450 MPa)
Weldable using TIG, MIG, or arc welding
Available thickness: 3 mm – 100 mm
Surface: 2B, No.1, No.4
Applications:
Oil & gas industry
Marine platforms
Chemical processing equipment
Structural components in corrosive environments
2. 2205 Stainless Steel Sheet
Overview:
2205 stainless steel sheets offer lightweight and versatile flat forms for industrial fabrication. Compared to plates, sheets are ideal for bending, forming, and cutting into custom components.
Key Features:
High corrosion resistance in chloride-rich environments
Excellent mechanical properties
Surface finishes: 2B, BA, No.4, Hairline (HL)
Thickness range: 0.3 mm – 6 mm
Width range: 600 mm – 2000 mm
Applications:
Fabrication of tanks, panels, and covers
Marine and offshore structures
Desalination equipment
Chemical processing units
3. 2205 Stainless Steel Strip
Overview:
2205 stainless steel strips are narrow coil products commonly used in precision manufacturing, piping, and assembly applications. Their smaller width allows custom slitting and component fabrication.
Key Features:
Duplex structure ensures high strength and corrosion resistance
Easily slitted into narrow widths
Thickness: 0.3 mm – 3 mm
Width: 10 mm – 600 mm
Surface finish: 2B, No.4, HL
Applications:
Pipe clamps and fittings
Fasteners and brackets
Precision chemical equipment components
Industrial hardware
4. 2507 Super Duplex Stainless Steel Coil
Overview:
2507 super duplex stainless steel coils are high-performance alloys with superior corrosion resistance, high strength, and PREN > 40, making them suitable for the most aggressive chemical and marine environments.
Key Features:
Exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking
Yield strength approximately double conventional austenitic stainless steels
Thickness: 0.5 mm – 12 mm
Width: 600 mm – 2000 mm
Surface finishes: 2B, BA, No.1, No.4
Applications:
Offshore oil & gas structures
Chemical processing plants handling chlorides
Desalination plants
Pressure vessels and heat exchangers
Stainless Steel 304 vs 316 vs 2205 – Full Comparison Table
| Comparison Item | 304 Stainless Steel | 316 Stainless Steel | 2205 Duplex Stainless Steel |
|---|---|---|---|
| Material Type | Austenitic Stainless Steel | Austenitic Stainless Steel | Duplex Stainless Steel (Austenite + Ferrite) |
| UNS Grade | S30400 | S31600 | S32205 / S31803 |
| Microstructure | Single-phase austenite | Single-phase austenite | Dual-phase (~50% austenite / 50% ferrite) |
| Key Alloying Elements | 18% Cr, 8% Ni | 16–18% Cr, 10–14% Ni, 2–3% Mo | 22% Cr, 5–6% Ni, 3% Mo, N addition |
| Yield Strength | ~205–215 MPa | ~205–220 MPa | 450–550 MPa |
| Tensile Strength | ~515–520 MPa | ~515–540 MPa | 650–800 MPa |
| Elongation | High (~40%) | High (~35–40%) | Medium (~25–30%) |
| Hardness | Low | Low | Medium–High |
| Pitting Corrosion Resistance | Poor | Moderate (improved by Mo) | Excellent (PREN ~35–40+) |
| Crevice Corrosion Resistance | Poor | Moderate | Excellent |
| Stress Corrosion Cracking (SCC) Resistance | Poor | Moderate | Very High Resistance |
| Seawater Suitability | Not recommended | Limited exposure only | Excellent (long-term seawater use) |
| Chloride Resistance | Low | Medium | Very High |
| High Temperature Performance | Good | Good | Good (but not for extreme high heat) |
| Weldability | Excellent | Excellent | Good (requires controlled welding procedure) |
| Machinability | Excellent | Excellent | Medium (work hardening effect) |
| Fabrication Difficulty | Easy | Easy | Moderate |
| Cost Level | Low | Medium | High |
| Lifecycle Cost | High (frequent replacement) | Medium | Low (long service life) |
| Typical Applications | Kitchenware, indoor structures | Chemical equipment, coastal architecture, food processing | Offshore platforms, seawater piping, desalination, petrochemical systems |
304 → General indoor and dry environments
316 → Mild marine and chemical environments
2205 → Severe chloride, seawater, offshore engineering systems
2205 Stainless Steel Coil Technical Questions
What is 2205 stainless steel coil?
2205 stainless steel coil is a duplex stainless steel material containing a balanced microstructure of austenite and ferrite. It provides high mechanical strength and excellent resistance to corrosion, particularly in chloride environments.
What standards apply to 2205 stainless steel coils?
2205 stainless steel coils are typically produced according to international standards such as:
ASTM A240
EN 10088
JIS G4305
These standards specify the chemical composition, mechanical properties, and dimensional tolerances.
What is the difference between 2205 and 316 stainless steel?
2205 duplex stainless steel has higher yield strength and better resistance to chloride stress corrosion cracking than 316 stainless steel. It is commonly used in more aggressive environments such as offshore structures and chemical processing plants.
What surface finishes are available for 2205 stainless steel coil?
Common surface finishes include:
2B
BA (Bright Annealed)
No.1
No.4
Hairline (HL)
Different finishes are suitable for various industrial or decorative applications.
What thickness and width are available?
Typical size ranges include:
Thickness: 0.3 mm – 12 mm
Width: 600 mm – 2000 mm
Custom sizes can also be produced based on customer requirements.
Can 2205 stainless steel coil be welded?
Yes. Duplex 2205 stainless steel offers good weldability and can be welded using common methods such as TIG, MIG, and shielded metal arc welding. Proper welding procedures are recommended to maintain corrosion resistance.
Is 2205 stainless steel suitable for marine environments?
Yes. Due to its high chromium, molybdenum, and nitrogen content, duplex 2205 has excellent resistance to pitting and crevice corrosion, making it suitable for marine and offshore applications.
What industries commonly use 2205 stainless steel coil?
Typical industries include:
Oil and gas
Offshore engineering
Chemical processing
Marine equipment manufacturing
Desalination plants
Pressure vessel fabrication
How is the quality of 2205 stainless steel coils inspected?
Quality inspection normally includes:
Chemical composition analysis
Mechanical property testing
Surface quality inspection
Dimensional measurement
Ultrasonic or eddy current testing
Mill Test Certificates (MTC) are usually provided according to EN 10204 3.1 standards.
Can 2205 stainless steel coil be customized?
Yes. Manufacturers usually provide customization options including:
Thickness and width
Coil weight
Surface finish
Slitting services for stainless steel strips
Is 2205 stainless steel magnetic?
Yes. Duplex 2205 stainless steel has a mixed austenitic and ferritic microstructure, which means it exhibits slight magnetic properties. The ferrite phase in the alloy causes the material to be partially magnetic, unlike fully austenitic stainless steels such as 304 or 316.
What is the PREN value of duplex 2205 stainless steel?
The Pitting Resistance Equivalent Number (PREN) of duplex 2205 stainless steel is typically above 34, depending on its exact chemical composition. This high PREN value indicates excellent resistance to pitting corrosion and crevice corrosion, particularly in chloride-containing environments such as seawater or chemical processing systems.
What is the maximum operating temperature of 2205 stainless steel?
Duplex 2205 stainless steel is generally recommended for service temperatures below 300°C (572°F). At higher temperatures, the duplex microstructure may become unstable, which can reduce mechanical strength and corrosion resistance.
Is duplex 2205 stainless steel suitable for pressure vessels?
Yes. Due to its high yield strength and excellent corrosion resistance, duplex 2205 stainless steel is widely used in pressure vessels, heat exchangers, and industrial storage tanks in the oil and gas and chemical industries.
What is the density of 2205 stainless steel?
The density of duplex 2205 stainless steel is approximately:
7.8 g/cm³
0.282 lb/in³
This density is similar to most stainless steel grades.
Contact Us
Xi'an Dongmeng Group Co., Ltd
Phone / WhatsApp / WeChat: +8615769214734
Email: office@dongmjd.com
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