SA240 Duplex 2205 (S31803) Stainless Steel sheet

SA240 Duplex 2205 (S31803) Stainless Steel Plate Supplier| Specifications, Equivalent Materials, and Price

When you need a material that combines high strength, excellent corrosion resistance, and cost-effectiveness for demanding environments, SA240 Duplex 2205 (S31803) stainless steel plate is an exceptional choice.

Supplied by Gangsteel, a leading stainless steel supplier in China, this duplex stainless steel is renowned for its outstanding SA240 Duplex 2205 corrosion resistance in chloride-rich and acidic conditions, making it ideal for marine, oil and gas, and chemical processing applications. Gangsteel offers SA240 Type 2205 stainless steel plate, sheet, bar, and custom components, meeting ASME SA240 and ASTM A240 standards.

This page provides detailed insights into the SA240 Duplex 2205 chemical composition, mechanical properties, equivalent materials, specifications, applications, and competitive SA240 Duplex 2205 price per kg. Explore our ASME SA240 stainless sheet portfolio for related grades like SA240 Gr 316L, SA240 Gr 304, and SA240 Gr 415.

1. What is SA240 Duplex 2205 (S31803)?

SA240 Duplex 2205, also known as UNS S31803, is a duplex stainless steel alloy with a balanced microstructure of approximately 50% austenite and 50% ferrite, featuring high chromium (21.0-23.0%), molybdenum (2.5-3.5%), and nitrogen (0.08-0.20%). This composition delivers superior strength, excellent corrosion resistance, and resistance to stress-corrosion cracking (SCC), particularly in chloride-heavy environments like seawater. SA240 Duplex 2205 material is ideal for applications requiring durability, such as offshore oil platforms, chemical tanks, and pulp/paper equipment. Compared to SA240 Gr 316, SA240 Duplex 2205 offers nearly twice the yield strength and better pitting resistance (PREN ~35), making it a preferred choice for harsh conditions.

Gangsteel’s SA240 Type 2205 stainless steel plate is engineered for industries needing robust performance, offering a cost-effective alternative to austenitic grades like SA240 Gr 317L or SA240 Gr 304L.

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2. SA240 Duplex 2205 Chemical Composition

The SA240 Duplex 2205 chemical composition, compliant with ASME SA240, is optimized for high strength and corrosion resistance in aggressive environments.

Note: The high chromium, molybdenum, and nitrogen content give SA240 Duplex 2205 a PREN of ~35, providing superior pitting resistance compared to SA240 Gr 316L, while low carbon ensures excellent weldability.

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3. SA240 Duplex 2205 Mechanical Properties

The SA240 Duplex 2205 mechanical properties, tested per ASME SA240, offer high strength and good ductility, making SA240 Type 2205 stainless steel plate ideal for high-stress applications.

Note: Solution annealing at 1020-1100°C (1868-2012°F) optimizes UNS S31803 mechanical properties for strength and corrosion resistance. Contact Gangsteel for a detailed SA240 Duplex 2205 technical data sheet.

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4. SA240 Duplex 2205 Allowable Stress

The allowable stress values for SA240 Duplex 2205, per ASME BPVC Section II, Part D, ensure safe performance in corrosive and high-stress environments.

Note: These values ensure SA240 Duplex 2205 material performs reliably in applications like seawater piping and chemical tanks under moderate temperatures.

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5. SA240 Duplex 2205 Equivalent Materials

SA240 Duplex 2205aligns with international standards for global compatibility.

Note: SA240 Duplex 2205 equivalent grades comply with ASME SA240, offering interchangeability with SA240 Gr 316 in less demanding chloride environments but with higher strength.

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6. SA240 Duplex 2205 vs SA240 Gr 316, SA240 Gr 304, and SA240 Gr 415

Choosing the right stainless steel grade is critical to your project’s success. Here’s how SA240 Type 2205 compares to SA240 Gr 316, SA240 Gr 304, and SA240 Gr 415:

• SA240 Duplex 2205 vs SA240 Gr 316: SA240 Duplex 2205 offers higher strength and better pitting resistance (PREN ~35) for seawater applications, while SA240 Gr 316 is more versatile for general corrosion resistance.
• SA240 Duplex 2205 vs SA240 Gr 304: SA240 Duplex 2205 provides superior strength and corrosion resistance in chlorides, while SA240 Gr 304 is more cost-effective for general applications.
• SA240 Duplex 2205 vs SA240 Gr 415: SA240 Duplex 2205 excels in chloride-heavy environments, while SA240 Gr 415 offers higher strength for oilfield and turbine applications.

Conclusion: Choose SA240 Type 2205 for high-strength, corrosion-resistant applications in marine and chemical environments, SA240 Gr 316 for versatile corrosion resistance, SA240 Gr 304 for cost-effective general use, or SA240 Gr 415 for high-stress oilfield applications.

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7. SA240 Duplex 2205 Specifications

Gangsteel provides SA240 Type 2205 stainless steel plate, sheet, bar, and custom components to meet your project’s needs:

7.1 Plate and Sheet

• Thickness: 0.5 mm to 100 mm (plate), 0.1 mm to 6 mm (sheet)
• Width: 1000 mm to 3000 mm
• Length: 2000 mm to 12000 mm (or coiled for sheet)
• Surface Finish: Hot-rolled, cold-rolled, annealed, pickled, 2B, No.1, or customized
• Standards: ASTM A240, ASME SA240
• Applications: SA240 Type 2205 plate for seawater piping, UNS S31803 sheet for chemical tanks

7.2 Bar

• Diameter: 6 mm to 500 mm
• Length: Up to 12000 mm
• Finish: Hot-rolled, cold-drawn, centerless ground
• Standards: ASTM A479, ASME SA-479
• Applications: SA240 Type 2205 bar for fittings and fasteners

7.3 Custom Components

• Types: Flanges (ASME B16.5), fittings, CNC-machined parts
• Tolerances: ±0.05 mm for precision components
• Applications: Tailored solutions for marine and oil/gas industries

Note: Need a specific size or finish? Gangsteel offers custom solutions, including annealing at 1020-1100°C. Contact us for bespoke SA240 Duplex 2205 material specifications.

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8. Applications of SA240 Duplex 2205

SA240 Duplex 2205is designed for industries facing severe corrosion and high mechanical stress. Key SA240 Duplex 2205 applications include:

• Marine: SA240 Type 2205 stainless steel plate for seawater piping and desalination systems.
• Oil and Gas: UNS S31803 plate for offshore platforms and pipelines.
• Chemical Processing: SA240 Type 2205 sheet for tanks and reactors in chloride-heavy environments.
• Pulp and Paper: SA240 Duplex 2205 bar for digester components.
• Power Generation: Components for flue gas desulfurization systems.

Note: Compared to SA240 Gr 317L, SA240 Duplex 2205 offers higher strength and better pitting resistance in seawater applications.

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9. Price of SA240 Duplex 2205

The SA240 Duplex 2205 price per kg ranges from USD 8-15 per kg (FOB), influenced by:

• Alloy Content: Moderate chromium (21.0-23.0%) and molybdenum (2.5-3.5%) keep costs lower than SA240 Gr 415.
• Market Demand: High demand in marine and oil/gas industries drives UNS S31803 price.
• Product Form: SA240 Type 2205 stainless steel plate may cost more than sheet due to processing complexity.
• Global Supply Chain: Freight and availability impact SA240 Duplex 2205 cost.

For a precise SA240 Duplex 2205 price per kg or bulk discounts, contact Gangsteel. We’ll ensure you get the best value for your project.

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10. Related Stainless Steel Grades

Gangsteel offers a wide range of ASME SA240 stainless sheet grades to complement SA240 Type 2205 for various applications:

• SA240 Gr 201: Cost-effective for general applications.
• SA240 Gr 202: General corrosion resistance for decorative uses.
• SA240 Gr 255: High strength for structural applications.
• SA240 Gr 301: High strength for springs and fasteners.
• SA240 Gr 301L: Low-carbon for improved weldability.
• SA240 Gr 301LN: Nitrogen-enhanced for strength and weldability.
• SA240 Gr 302: General-purpose austenitic stainless steel.
• SA240 Gr 304: Versatile for food and general industries.
• SA240 Gr 304H: High-temperature strength for heat exchangers.
• SA240 Gr 304L: Low-carbon for weldability in corrosive environments.
• SA240 Gr 304LN: Nitrogen-enhanced for strength.
• SA240 Gr 304N: High strength for structural applications.
• SA240 Gr 305: High nickel for deep drawing applications.
• SA240 Gr 309CB: High-temperature corrosion resistance.
• SA240 Gr 309H: High-temperature strength for furnaces.
• SA240 Gr 309HCB: Enhanced high-temperature performance.
• SA240 Gr 309S: Corrosion resistance for high-temperature applications.
• SA240 Gr 310CB: High-temperature strength with columbium.
• SA240 Gr 310H: High-temperature resistance for furnaces.
• SA240 Gr 310HCB: Enhanced high-temperature performance.
• SA240 Gr 310MOLN: Nitrogen-enhanced for urea production.
• SA240 Gr 310S: High-temperature corrosion resistance.
• SA240 Gr 316: Excellent corrosion resistance for marine applications.
• SA240 Gr 316CB: Columbium-stabilized for weldability.
• SA240 Gr 316H: High-temperature strength for chemical processing.
• SA240 Gr 316L: Low-carbon for enhanced weldability.
• SA240 Gr 316LN: Nitrogen-enhanced for strength and corrosion resistance.
• SA240 Gr 316N: High strength for structural applications.
• SA240 Gr 316Ti: Titanium-stabilized for high-temperature weldability.
• SA240 Gr 317: High corrosion resistance for chemical processing.
• SA240 Gr 317L: Low-carbon for acidic environments.
• SA240 Gr 415: High strength for oilfield and turbine applications.

Note: These grades complement SA240 Type 2205 in marine, oil/gas, and corrosion-resistant applications. Contact Gangsteel for a full catalog to find the perfect material for your project.

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11. Why Choose Gangsteel?

When you’re sourcing SA240 Type 2205, you need a supplier who delivers quality, speed, and value. Here’s why Gangsteel is your trusted partner:

• Quality Assurance: Every SA240 Duplex 2205 stainless steel plate meets ASTM A240 and ASME SA240 standards, backed by EN 10204 3.1/3.2 certificates for complete confidence.
• Fast Delivery: Standard orders ship in 7-15 days, with expedited options to keep your project on track.
• Customization: Need a specific size or shape? We offer precision cutting (CNC, laser, waterjet), welding, and tailored heat treatments.
• Global Supply: We serve clients in Saudi Arabia, UAE, India, Europe, and beyond, ensuring reliable delivery wherever you are.
• Extensive Inventory: Choose from our wide range of ASME SA240 stainless sheet grades, including SA240 Gr 316 and SA240 Gr 304.

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12. Conclusion

For projects demanding high strength and superior corrosion resistance in harsh environments, SA240 Type 2205 stainless steel plate from Gangsteel is your ideal solution. Known as UNS S31803, its duplex structure delivers exceptional performance for seawater piping, oil/gas platforms, and chemical reactors, offering better pitting resistance than SA240 Gr 316L and higher strength than SA240 Gr 304. Available in versatile specifications (0.5-100 mm thickness, up to 3000 mm width) and equivalent grades (W.Nr. 1.4462, EN X2CrNiMoN22-5-3), Gangsteel provides quality at a competitive SA240 Duplex 2205 price per kg (USD 8-15/kg).

Contact Gangsteeltoday for a quick quote on SA240 Duplex 2205 price per kg or to request a detailed UNS S31803 technical data sheet. Browse our ASME SA240 stainless sheet portfolio to find the perfect solution for your corrosion-resistant needs!