Duplex Steel Products Manufacturers, Supplier and Exporter in India
Duplex Steel Pipes & Tubes, Duplex Steel Plates, Sheets & Coils, Duplex Steel Bars, Rods & Wires, Duplex Steel Fittings, Duplex Steel Flanges, Duplex Steel Fasteners
Amardeep Steel is a leading duplex steel manufacturer and supplier in India, providing a comprehensive range of high-quality Duplex Steel Products. We are also a global exporter, ensuring our materials reach projects worldwide. Our expertise with duplex material allows us to supply products that combine the high strength of ferritic steel with the superior corrosion resistance of austenitic steel. This unique two-phase microstructure makes our duplex steel an ideal solution for applications where both mechanical performance and resistance to harsh environments are critical. We pride ourselves on supplying duplex steel products in India that adhere to strict international standards, guaranteeing a reliable and long-lasting solution at a competitive duplex steel price.
Duplex Steel Products
Duplex Steel Specifications
When sourcing duplex material, defining the correct specifications is crucial for project success. We provide products that adhere to major international standards like ASTM, ensuring their integrity and performance. Our products can be supplied with specific tolerances, testing, and documentation to meet your project's precise requirements.
| Item | Specification |
|---|---|
| Common Grades | UNS S31803 / S32205 (2205), DIN 1.4462; A182 F51 (forgings) |
| Product Standards | ASTM A790 (pipe), A789 (tube), A240 (plate/sheet), A182 (flanges/forgings), A276/A479 (bars), A815 (buttweld fittings); EN 10088-3 |
| Dimensional Refs | ASME B36.19M (pipe), ASME B16.5/B16.47 (flanges), ASME B16.9 (BW fittings), ASME B16.11 (forged fittings) |
| Finishes / Condition | Hot rolled, cold drawn, pickled & passivated, polished; solution annealed |
| Documentation | EN 10204 3.1 / 3.2 MTC, PMI, heat charts |
| Testing (options) | ASTM A923 (intermetallic), ASTM G48 (pitting), UT/ET, hydrostatic |
| Tolerances | Per ASTM/ASME/EN; tight tolerances & cut lengths on request |
Duplex Steel Chemical Composition
The unique properties of duplex steel come from its balanced chemical composition. The key alloying elements—Chromium, Molybdenum, and Nitrogen—provide enhanced strength and resistance to pitting and stress corrosion cracking.
| Grade (UNS) | Cr % | Ni % | Mo % | N % | Others |
|---|---|---|---|---|---|
| S31803 | 21.0–23.0 | 4.5–6.5 | 2.5–3.5 | 0.08–0.20 | C ≤0.03, Mn ≤2.0 |
| S32205 | 22.0–23.0 | 4.5–6.5 | 3.0–3.5 | 0.14–0.20 | C ≤0.03, Mn ≤2.0 |
Duplex Steel Material Properties
Duplex Stainless Steel offers a superior combination of high tensile strength and ductility, along with excellent resistance to corrosion. These properties make it a powerful alternative to many austenitic grades.
| Property | S31803 (2205) | S32205 (2205) |
|---|---|---|
| Tensile Strength (min) | 620 MPa (90 ksi) | 620 MPa (90 ksi) |
| Yield Strength 0.2% (min) | 450 MPa (65 ksi) | 450 MPa (65 ksi) |
| Elongation (min) | 25% | 25% |
Applications of Duplex Stainless Steel
The exceptional strength and corrosion resistance of duplex steel make it an ideal choice for a wide range of industries and applications.
- Oil & Gas: Used in pipelines, risers, and process equipment for its resistance to chloride stress corrosion cracking (CSCC).
- Chemical Processing: Ideal for heat exchangers, pressure vessels, and tanks that handle aggressive media.
- Marine & Shipbuilding: Applications include propellers, shafts, and desalination plants due to excellent seawater resistance.
- Pulp & Paper Industry: Used in digesters and bleaching equipment for its resistance to corrosive chemicals.
Duplex Steel Price
The cost of duplex steel is influenced by several factors, including the specific grade, product form, and global market conditions for key alloying elements such as nickel and molybdenum.
While the initial purchase price is typically higher than standard austenitic grades like 304 or 316, its superior strength and corrosion resistance provide significant long-term value by reducing maintenance and replacement costs.
For a precise quotation tailored to your project's specific requirements, please contact our sales team.
Frequently Asked Questions About Duplex Steel Products
1. What is duplex steel?
Duplex steel is a type of stainless steel that has a two-phase microstructure, consisting of a mix of both ferritic and austenitic stainless steel. This unique structure gives it a combination of high strength and excellent resistance to corrosion.
2. How does duplex steel compare to stainless steel?
While duplex steel is a type of stainless steel, it offers significant advantages over common austenitic grades like 304 and 316. Duplex provides roughly twice the yield strength and is far more resistant to chloride-induced pitting and stress corrosion cracking.
3. Is duplex steel magnetic?
Yes, because of its dual-phase microstructure that contains a significant amount of the ferritic phase, duplex steel is magnetic. This is a simple way to distinguish it from non-magnetic austenitic grades like 304 and 316.
4. What are the most common grades of duplex steel?
The most common grades are UNS S31803 and UNS S32205, often referred to as Duplex 2205. For more aggressive environments, UNS S32750 (Super Duplex 2507) is used for its enhanced corrosion resistance.
