Super Duplex Stainless Steel Products Manufacturers, Super Duplex Steel Supplier and Super Duplex Steel Exporter
As a premier super duplex material exporter, Amardeep Steel provides high-performance austenitic-ferritic stainless steels that are a superior alternative to conventional 300 and 400 series stainless steel. Our super duplex grades are a two-phase mixture of approximately 50% austenite and 50% ferrite, offering a unique combination of exceptional strength and outstanding corrosion resistance. This makes them ideal for demanding applications in industries such as aerospace, automotive, manufacturing, and oil and gas. If your project requires the highest level of reliability and durability, you've come to the right place. Contact us today to learn more about our export capabilities and our full range of super duplex products.
Duplex Steel Products
Super Duplex Steel Specifications
We supply super duplex stainless steel that conforms to major international standards, ensuring reliability for demanding applications. Our products can be supplied with specific tolerances and third-party documentation for a seamless approval process.
| Item | Specification |
|---|---|
| Common Grades | UNS S32750 (2507), UNS S32760; A182 F53/F55; DIN 1.4410 / 1.4501 |
| 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, ASME B16.5/B16.47, ASME B16.9, ASME B16.11 |
| 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, ASTM G48 Method A, UT/ET, hydrostatic |
| Tolerances | Per ASTM/ASME/EN; tight tolerances & cut lengths on request |
Super Duplex Stainless Steel Chemical Composition
The high performance of super duplex stainless steel is derived from its rich alloy content. The elevated levels of Chromium, Molybdenum, and Nitrogen are key to its exceptional resistance to pitting and crevice corrosion.
| Grade (UNS) | Cr % | Ni % | Mo % | N % | Others |
|---|---|---|---|---|---|
| S32750 | 24.0–26.0 | 6.0–8.0 | 3.0–5.0 | 0.24–0.32 | C ≤0.03, Cu ≤0.5 |
| S32760 | 24.0–26.0 | 6.0–8.0 | 3.0–4.0 | 0.20–0.30 | C ≤0.05, Cu 0.5–1.0, W 0.5–1.0 |
Super Duplex Steel Material Properties
Super duplex material offers superior mechanical properties, including high tensile and yield strength, making it a strong alternative to standard stainless steels in high-stress environments.
| Property | S32750 (2507) | S32760 |
|---|---|---|
| Tensile Strength (min) | 800 MPa (116 ksi) | 750 MPa (109 ksi) |
| Yield Strength 0.2% (min) | 550 MPa (80 ksi) | 550 MPa (80 ksi) |
| Elongation (min) | 25% | 25% |
| Hardness (max) | 310 HBW | 290 HBW |
Super Duplex Stainless Steel Equivalent
| Grade | Equivalent Names |
|---|---|
| UNS S32750 | Duplex 2507, SAF 2507 |
| UNS S32760 | Zeron 100 |
Super Duplex Material Code
| Material Code | Corresponding Grade |
|---|---|
| F53, 1.4410 | UNS S32750 |
| F55, 1.4501 | UNS S32760 |
Super Duplex Material Grade
Choosing the right grade of super duplex is essential for matching performance to your project's environment. Here are two of the most widely used grades and their key benefits.
- UNS S32750: This is the most common grade of super duplex steel. It is known for its excellent resistance to pitting and crevice corrosion, making it a reliable choice for harsh environments like offshore platforms and chemical processing plants.
- UNS S32760: This grade is a highly-alloyed super duplex steel. It contains tungsten and copper, which gives it even greater corrosion resistance than S32750, making it suitable for extremely corrosive applications such as in sulfuric acid and phosphoric acid environments.
Super Duplex Steel Applications
The exceptional strength and corrosion resistance of super duplex steel make it an essential material for industries operating in the most demanding conditions.
- Oil & Gas: Used in pipelines, risers, and offshore platforms for its resistance to seawater and chloride-induced stress corrosion cracking.
- Chemical Processing: Ideal for heat exchangers, pressure vessels, and tanks that handle aggressive media like sulfuric acid.
- Marine & Shipbuilding: Applications include propellers, shafts, and desalination plants where high resistance to corrosive seawater is vital.
- Pulp & Paper Industry: Used in bleaching equipment and digesters due to its resistance to corrosive chemicals and high temperatures.
Frequently Asked Questions About Super Duplex Steel
1. What is super duplex steel?
Super duplex steel is a highly-alloyed stainless steel with a two-phase microstructure (ferrite and austenite). This composition provides a powerful combination of superior strength and exceptional corrosion resistance, particularly in aggressive, chloride-rich environments.
2. What is the difference between duplex and super duplex?
Super duplex is an advanced version of duplex steel. It contains higher levels of chromium, molybdenum, and nitrogen, which significantly enhance its resistance to pitting, crevice corrosion, and stress corrosion cracking. This makes it suitable for more severe service conditions.
3. Does super duplex rust?
No, super duplex steel is highly resistant to rusting due to its high alloy content. While no material is completely immune to corrosion, super duplex is designed to perform in environments where standard stainless steels would fail, making it extremely reliable for long-term, corrosive applications.
4. Is super duplex better than stainless steel?
For demanding industrial applications, yes, super duplex is far superior to common stainless steels like 304 or 316. It offers roughly double the strength and provides exceptional resistance to chloride-induced pitting and stress corrosion cracking. While it has a higher initial cost, its enhanced performance and durability result in a longer service life and lower long-term maintenance costs, making it a more reliable and cost-effective choice for critical projects.
5. Is super duplex steel magnetic?
Yes, super duplex steel is magnetic. This is because its unique microstructure contains a significant percentage of ferrite, a magnetic phase. This characteristic is a quick way to differentiate it from non-magnetic austenitic stainless steels.
