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Duplex Stainless Steel 2101 (UNS S32101)

Stainless Steel Pipe Fittings Riyaarth Overseas in Mumbai

Duplex Stainless Steel 2101 (UNS S32101) is a lean duplex stainless steel known for its superior strength, corrosion resistance, and cost-effectiveness. With a balanced combination of austenitic and ferritic phases, Duplex 2101 offers outstanding mechanical properties, making it an excellent choice for structural applications and corrosive environments. It is widely used in industries such as chemical processing, oil and gas, water treatment, and construction.

Key Properties of Duplex Stainless Steel 2101 (UNS S32101)

  1. High Strength and Toughness: Duplex 2101 has almost twice the strength of standard austenitic stainless steels, enabling weight reduction in structural applications.
  2. Excellent Corrosion Resistance: Provides good resistance to pitting, crevice corrosion, and stress corrosion cracking, particularly in chloride-rich environments.
  3. Cost-Effective Composition: With a reduced nickel content, Duplex 2101 is a more economical option compared to standard duplex and austenitic stainless steels without sacrificing performance.
  4. Weldability and Formability: Duplex 2101 offers good weldability and can be easily formed, making it versatile for various fabrication processes.
  5. Enhanced Resistance to Fatigue and Abrasion: With superior fatigue and abrasion resistance, Duplex 2101 is ideal for dynamic and high-stress applications.

Chemical Composition of Duplex Stainless Steel 2101

  • Chromium (Cr): 21.5%
  • Nickel (Ni): 1.5%
  • Manganese (Mn): 5.0%
  • Molybdenum (Mo): 0.3%
  • Nitrogen (N): 0.22%
  • Iron (Fe): Balance

This balanced composition provides Duplex 2101 with its unique combination of strength, corrosion resistance, and cost efficiency.

Mechanical Properties of Duplex Stainless Steel 2101

  • Tensile Strength: Approximately 650-880 MPa
  • Yield Strength: Approximately 450 MPa
  • Elongation: 30%
  • Hardness: 25 HRC

Applications of Duplex Stainless Steel 2101

  1. Chemical Processing: Ideal for applications involving exposure to corrosive chemicals and moderate temperatures.
  2. Oil and Gas Industry: Used in offshore platforms, pipelines, and other equipment exposed to saline and chloride-rich environments.
  3. Water Treatment and Desalination: Suitable for seawater handling, desalination plants, and wastewater treatment equipment.
  4. Construction and Structural Applications: Often used in bridges, support structures, and architectural applications due to its high strength and corrosion resistance.
  5. Food and Beverage Processing: Compatible with equipment exposed to organic and inorganic acids in food and beverage production.

Manufacturing Standards for Duplex Stainless Steel 2101

Duplex 2101 is produced in compliance with the following standards to ensure quality and consistency:

  • ASTM A240: Specification for chromium and chromium-nickel stainless steel plate, sheet, and strip for pressure vessels and general applications.
  • ASTM A789: Specification for seamless and welded ferritic-austenitic stainless steel tubing.
  • ASTM A790: Specification for seamless and welded ferritic-austenitic stainless steel pipe.
  • ASME SA240, SA789, SA790: ASME standards for pressure vessel applications.

Available Forms and Customization Options

  1. Forms: Available as sheets, plates, bars, rods, pipes, tubes, and fittings.
  2. Sizes: Duplex 2101 can be supplied in a wide range of sizes and customized dimensions to meet specific project needs.
  3. Surface Finishes: Options include pickled, polished, and mill finish, suitable for different aesthetic and performance requirements.
  4. Heat Treatments: Solution annealing available to enhance strength and corrosion resistance.

Quality Assurance

All Duplex 2101 stainless steel products undergo rigorous quality checks to ensure they meet the highest standards:

  • Mechanical Testing: Confirms tensile and yield strength, elongation, and hardness.
  • Corrosion Testing: Ensures resistance to pitting, crevice corrosion, and stress corrosion cracking.
  • Dimensional Accuracy: Precision cutting and machining to meet specified tolerances.

FAQs

How does Duplex 2101 compare to 304 and 316 stainless steels?

Duplex 2101 has higher strength and better corrosion resistance in chloride environments compared to 304 and 316. It’s also more cost-effective due to lower nickel content, making it suitable for applications requiring both strength and corrosion resistance.

Can Duplex 2101 be used in high-temperature environments?

Duplex 2101 performs well in moderate temperature environments but may not be suitable for prolonged use in extremely high temperatures, as excessive heat can impact its microstructure.

Is Duplex 2101 suitable for welding applications?

Yes, Duplex 2101 offers good weldability and can be welded using standard welding methods, though care should be taken to avoid excessive heat input to maintain its duplex structure.

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Industry We Serve

  • Oil & Gas industries
  • Chemical process industries
  • Pump and valve in high pressure component
  • Food industries
  • Pulp and paper industry
  • Aerospace industry
  • Power plant
  • Mechanical component
  • Sugar industry
  • Cement industry
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