Duplex Steel Plates – High-Performance Solutions

Duplex Steel & Alloys is a prominent manufacturer and supplier of duplex stainless steel plates in Mumbai, India, for high performance in industries such as oil and gas, chemical, marine, and power. Our range includes some of the most commonly used grades, such as S31803 and 32205, which are popular for their high strength, excellent corrosion resistance and longer life when used in hostile conditions.

Main Characteristics of Duplex Stainless Steel Plates

Chemical Composition

The exceptional performance of Duplex Stainless Steel Plates is attributed to their unique chemical composition:

• Chromium (22-23%): Offers better protection against corrosion than other forms of steel, particularly in chloride-containing areas.
• Molybdenum (3-3.5%): Improves resistance against pitting and crevice corrosion. These duplex steel plates are perfect for use in marine and chemical industries.
• Nitrogen (0.14-0.20%): Enhances the tensile strength of the alloy and also increases the resistance of the alloy to localized corrosion.

These components form an ideal combination of austenitic and ferritic microstructures to provide the best mechanical and chemical characteristics.

Mechanical properties and Application

High strength for critical application

Duplex Stainless Steel Plates exhibit impressive mechanical properties:

• Tensile Strength: 620 MPa minimum – Provides adequate support for structures that are expected to work under high pressure, including oil platforms and chemical processing plants.
• Yield Strength: 450 MPa minimum—This means that the material can bear very high loads without getting deformed, which makes it ideal for construction and machinery.
• Elongation: Up to 25% – Offers ductility for some applications that require much deformation like the ship building and forming industries.

Heat Resistance and Durability

Duplex grades such as S31803 and 32205 show very good performance characteristics in high temperature service and good thermal fatigue properties and are used in power generation boilers and heat exchangers.

Standards Compliance

Our Duplex Stainless Steel Plates comply with stringent international standards, ensuring consistency and reliability in every application:

• ASTM A789/A790:Standards for stainless steel pipes and plates – seamless and welded.
• EN 10088: The European standard for corrosion resistant stainless steel.

Also, we have ISO 9001 and ASME certifications that ensure we follow quality standards worldwide.

Applications and Advantages in Industries

Oil & Gas

Duplex S31803 plates are in great demand for the oil and gas industry due to their chloride resistance, H₂S stress corrosion cracking, and high pressure. They are used in offshore platforms and pipelines, where a reliable product is important in unfriendly environments.

Chemical Processing

These plates offer excellent resistance to acids and alkalis and are used in chemical reactors, storage tanks and evaporators. Their surface does not contaminate the process, thus meeting the ASTM and ASME standards.

Shipbuilding

Hulls, bulkheads, and other marine structures can benefit from the high toughness, ductility, and resistance of duplex plates to seawater corrosion. They are certified to work in the maritime industry by DNV, ABS, and Lloyd’s Register to ensure that they deliver.

Power Generation

In high temperature and high pressure applications such as boilers or turbines, Duplex 32205 has a long service life, and is also compatible with turbine parts, thus minimizing the need for replacement and the associated expenses.

Third Party Testing for Quality Control

To ensure top-notch quality and reliability, our Duplex Stainless Steel Plates undergo essential third-party testing:

• Positive Material Identification (PMI):Checks for chemical content to meet the standards of the Duplex grades such as S31803 and 32205.
• Hydrostatic Testing:Verifies the pressure carrying capacity and thus guarantees leak tightness in pipelines and pressure vessels.
• Radiographic Testing: Internal defects such as cracks or voids are identified, ensuring structural reliability for high-risk applications.

These tests help to guarantee that our plates are of the best quality and are capable of performing to the best levels of safety required in some of the most challenging sectors.

Duplex steel plates grades (S31803, 32205)

Both grades have comparable mechanical and corrosion resistance characteristics, however, Duplex 32205 plate has slightly better tensile and yield strength, and therefore is more suitable for applications where increased load carrying capacity is required. Duplex steel S31803 plate is relatively cheaper but offers a fairly good performance compared to the two.

Logistics and Product Documentation

At Duplex Steel & Alloys, we ensure seamless delivery with a comprehensive range of product documentation, including:

• Mill Test Certificates (MTC):Confirms that products meet the ASTM and EN standards.
• Packing Lists and Invoices:Designed for both import/export and domestic deliveries.
• Third-Party Inspection Reports: This information is available upon request to ensure that the company has maximum transparency.

We also provide custom dimensions and can accommodate large orders so your project can remain on deadline.

Why Choose Us as Your Duplex Steel Plates Supplier?

Duplex Steel & Alloys has both technical know-how and quality assurance, making it the leading supplier of Duplex Stainless Steel Plates globally.

• Certified Excellence:We supply products that meet the highest standards worldwide, such as ISO 9001, PED and ASME, for the highest performance in critical industrial uses.
• Global Presence:We are a Mumbai-based company with a good export base and cater to the needs of various industries worldwide.
• Tailored Solutions: We guarantee that our products come in the correct dimensions, surface finishes and treatments to suit the specific needs of your application.

If you require superior quality Duplex Stainless Steel Plates that perform under pressure, are corrosion resistant and have a long life cycle, your best bet is Duplex Steel & Alloys. Get a free quote today or learn more about how our services can meet your project requirements.

Duplex Stainless Steel Plate Specification

Types of Duplex Stainless Steel Plates

SA 240 Plate, ASTM A240 Sheet, Duplex Steel Coil, Duplex Steel Flat, Duplex Steel Sheet Thickness Chart, Duplex Steel Sheets Suppliers in Mumbai.

Duplex Stainless Steel Plate Price List

Duplex Stainless Steel Size Chart

Duplex Steel Sheet Weight Chart

Stock available for Range of Duplex Steel Plate

Tests of ASTM A240 Plate

Before being prepared for shipment to the customer, ASTM A240 Duplex Steel Plates Testing should be constructed in accordance with applicable standards and thoroughly tested for potential flaws.

Finishes Of Duplex Steel Plate

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Duplex Steel Sheets Supply in Below Countries

Common Application for Duplex Stainless Steel 2205 Sheets