Duplex steel is a type of stainless steel that has a two-phase microstructure consisting of both austenitic and ferritic grains. It offers excellent strength, corrosion resistance, and high durability. There are several grades of duplex steel, each with unique properties that make them suitable for specific applications. Here is a brief description of duplex steel products with grades

• Duplex 2205: Duplex 2205 is the most widely used duplex stainless steel. It contains 22% chromium, 5% nickel, and 3% molybdenum. It has high strength, excellent corrosion resistance, and is often used in chemical processing, oil and gas, and marine applications.
• Duplex 2304: Duplex 2304 contains 23% chromium, 4% nickel, and 0.1% nitrogen. It has good corrosion resistance, high strength, and is often used in chemical processing, pulp and paper, and oil and gas applications.
• Duplex 2507: Duplex 2507 contains 25% chromium, 7% nickel, and 4% molybdenum. It has excellent corrosion resistance in various environments, including seawater and acidic solutions. It is often used in chemical processing, oil and gas, and marine applications.
• Lean duplex: Lean duplex is a low-nickel duplex stainless steel that contains less than 3% nickel. It has good strength, high resistance to stress corrosion cracking, and is often used in chemical processing, oil and gas, and pulp and paper applications.

Duplex steel products with these grades include pipes, tubes, sheets, plates, bars, fasteners, and fittings.

Chemical Compositions

Mechanical Properties

Equivalent Grades

Physical Properties