Duplex Stainless Steel Sheets

Description

1. Product Overview
   Duplex Stainless Steel Sheets are high-performance corrosion-resistant flat-rolled steel products engineered with a dual-phase microstructure of austenite and ferrite. They are primarily used in demanding industrial environments such as chemical processing, oil & gas, marine engineering, desalination, and structural applications requiring superior strength and corrosion resistance. The key value proposition lies in their exceptional mechanical strength combined with outstanding resistance to stress corrosion cracking and pitting. Strategically, duplex stainless steel is a critical material in industries transitioning toward higher efficiency, longer lifecycle assets, and reduced maintenance costs.
2. Key Specifications & Technical Characteristics

• Material Grades: Duplex 2205 (UNS S31803/S32205), Super Duplex 2507 (UNS S32750)
• Chemical Composition (typical):
  • Chromium (Cr): 19–28%
  • Nickel (Ni): 4.5–8%
  • Molybdenum (Mo): 0–4%
  • Nitrogen (N): 0.1–0.3%
  • Iron (Fe): Balance
• Physical Characteristics:
  • Form: Flat rolled sheets/plates
  • Surface Finish: 2B, BA, No.1, polished (as required)
  • Density: ~7.8 g/cm³
  • High tensile strength (up to ~800–1000 MPa depending on grade)
• Thickness Range: 0.3 mm – 50 mm
• Width Range: 1000 mm – 2000 mm (customizable)
• Packaging: Export-standard wooden crates, steel strapping, waterproof wrapping
• Shelf Life: Indefinite under proper dry storage conditions

3. Core Industrial Applications
   Duplex stainless steel sheets are widely used across high-stress, corrosive industrial sectors. In the oil & gas industry, they are deployed in pressure vessels, pipelines, and offshore platforms due to their resistance to chloride-induced corrosion. In chemical processing, they are used in heat exchangers, storage tanks, and reactors where aggressive media are present. Marine and desalination plants rely on duplex steel for seawater handling systems, ensuring long service life under extreme salinity. Compared to standard austenitic stainless steels, duplex grades offer nearly double the yield strength, enabling thinner material use, reduced weight, and lower lifecycle costs without compromising durability.
4. Competitive Advantages

• Superior corrosion resistance in chloride and acidic environments
• High mechanical strength enabling material optimization and cost reduction
• Excellent stress corrosion cracking resistance compared to 304/316 grades
• Consistent metallurgical quality under stringent production standards
• Reliable global supply chain with scalable bulk availability
• Optimized logistics for international containerized shipments
• Competitive pricing structure for large-volume industrial procurement
• Environmentally efficient due to longer lifecycle and reduced replacement frequency
• Full technical documentation and compliance certification support (ASTM, EN standards)

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): BULK 20 MT
• Loading Capacity: 20–25 MT per 20-foot container (depending on thickness and packaging configuration)