Duplex Steel Plate: Complete Specification & Buyer’s Guide
Duplex Steel Plate: Complete Specification & Buyer’s Guide
If your project calls for a steel plate that can resist stress corrosion cracking, pitting, and crevice corrosion in demanding environments, duplex is the grade worth specifying. Duplex plates are made from duplex stainless steel (DSS), engineered with a balanced microstructure of austenite and ferrite that delivers higher strength than conventional austenitic grades along with excellent corrosion resistance. This guide covers duplex plate specifications, manufacturing methods, grades, and finishes to help you choose the right stl plate for your application.
What Is a Duplex Steel Plate?
It is produced from DSS, a dual-phase alloy known for its resistance to stress corrosion cracking, pitting, and crevice corrosion. The most commonly available grades are UNS S31803 and UNS S32205, though the exact composition and properties can vary depending on the grade and the specific application requirements. Compared with a standard stainless steel plate, duplex offers noticeably higher strength while retaining good ductility and toughness.
How Is a Metal Steel Plate Like This Manufactured?
A DSS plate is typically produced in electric arc furnaces (EAF) or through the AOD (Argon Oxygen Decarburization) process, where alloying components are melted to achieve the correct chemical composition. The cast slabs or ingots are then heated to high temperatures and passed through a series of rolling mills. After hot rolling, the resulting stainless metal sheet may undergo further heat treatment to optimize its microstructure and mechanical properties.
Welding Techniques for Duplex Sheet and Plate
Welding ASTM A240 DSS sheets requires careful attention to the material’s composition and properties to ensure proper weld quality:
- GTAW – a versatile technique using a non-consumable tungsten electrode
- GMAW – uses a consumable wire electrode with an inert gas shield
- SMAW – uses a consumable coated electrode that provides the necessary shielding during welding
Specifications & Size Range of Duplex Plate
Duplex Pipeline Solutions supplies duplex plate across the following range:
- Wall thickness: 0.1mm – 100mm
- Size: 2m, 2.44m, 3m, or as required
- Finish: 2B, 2D, BA NO(8), SATIN
- Hardness: quarter, half, or spring
- Form: shim, strip, or coil
- Width: 10mm – 2500mm
- Yield strength: approximately 480 MPa
- Tensile strength: 90 ksi minimum
- Elongation: 25% minimum
Full chemical composition charts and mechanical property tables for the stainless steel duplex clad plate are available on request for project documentation.
Surface Finishes: From 2B to Custom Textures
Duplex Pipeline Solutions offers a range of standard and custom surface finishes:
- 2B finish – smooth, reflective surface achieved through cold rolling, annealing, and descaling
- No.2D finish – a slightly rougher surface, best suited to applications where appearance isn’t a priority
- Custom finishes – patterned, textured, or embossed options, along with specific roughness values to meet particular requirements
Key Advantages of Duplex Stainless Plater and Sheet Products
- Excellent corrosion resistance – particularly strong performance in aggressive environments containing chlorides and acids
- Higher strength – noticeably stronger than conventional austenitic stainless steels
- Good ductility and toughness – able to withstand deformation and absorb energy without cracking
- Good weldability – supports straightforward fabrication and joining with the correct technique
Why Choose Duplex Pipeline Solutions for Steel Plate
- Trusted duplex and stainless steel plate manufacturer, and perforated sheet supplier in India
- Custom surface finishes and sizes available on request
- Full traceability and certification support for every batch
