Super Duplex Steel Pipes, Tubes, Plates and Sheets
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Super Duplex stainless steel is an alloy of high performance used in operation under severe environments where it is necessary to establish high resistance to corrosion, high mechanical strength and long service life. It is an austenitic-ferrite combination that offers a better resistance to pitting, crevice corrosion and stress corrosion cracking than traditional duplex stainless steels.
Stellar Alloys provides steel pipes, tubes, plates, and sheets of super duplex steel that are produced and sourced under the international standards. The products are common in oil and gas, offshore, marine, chemical processing and power generation industries where reliability and material performance is of essence.
Table of Contents
- Super Duplex Steel Manufacturer and Supplier
- Super Duplex Steel Grades
- Super Duplex Stainless Steel Chemical Composition
- Super Duplex Steel Mechanical Properties
- Super Duplex Steel Pricing Information
- Applications of Super Duplex Steel
- Why Choose Stellar Alloys for Super Duplex Steel
- Frequently Asked Questions About Super Duplex Steel
Available Grades of Super Duplex Steel
Super Duplex Steel Manufacturer and Supplier
Stellar Alloys is a well-known manufacturer and supplier of Super Duplex steel items and supplies them in connection with the industrial and project-oriented needs, with a specification-based provision. We are targeting controlled sourcing, dimensional accuracy and material traceability of Super Duplex pipes, tubes, plates and sheets in UNS S32750 and UNS S32760 grades.
All the products go through the pertinent test reports and can be applied in sensitive services that require the presence of high pressure, chloride elements, and variable temperatures
Super Duplex Pipes and Tubes
Systems that require high strength as well as good resistance to corrosion select the Super Duplex steel pipes and tubes. These products are usually provided in a pressure and process form that is seamless and welded.
The typical pipes and tubes that are used in offshore piping, heat exchangers, desalination facilities and chemical processing equipment are the ones manufactured in compliance with the ASTM A790 and related standards and they are known as Super Duplex pipes and tubes.
Super Duplex Plates and Sheets
Super Duplex steel plates and sheets are flat-roll materials employed in the fabrication, pressure equipment and structural applications of metals where corrosion and mechanical loading resistance are necessary. These products have greater yield strength when compared to austenitic stainless steel such that less thickness and weight can be provided in engineered components.
Super Duplex plates and sheets are provided in a regular and cut to size versions to be used in process and storage tanks, structural support and in the marine industry.
Super Duplex Steel Grades
Stellar Alloys supplies Super Duplex stainless steel in commonly used international grades, including:
- UNS S32750 (Super Duplex 2507)
- UNS S32760
- SAF 2507
- EN 1.4410
These grades are selected based on corrosion resistance requirements, mechanical performance, and service environment conditions.
Super Duplex Stainless Steel Chemical Composition
| Element | Percentage (%) |
| Carbon | ≤ 0.03 |
| Chromium | 24.0 – 26.0 |
| Nickel | 6.0 – 8.0 |
| Molybdenum | 3.0 – 5.0 |
| Nitrogen | 0.24 – 0.32 |
| Manganese | ≤ 1.20 |
| Silicon | ≤ 0.80 |
| Phosphorus | ≤ 0.035 |
| Sulfur | ≤ 0.020 |
| Iron | Balance |
Super Duplex Steel Mechanical Properties
Property | Typical Value |
Tensile Strength | ≥ 800 MPa |
Yield Strength (0.2%) | ≥ 550 MPa |
Elongation | ≥ 15% |
Hardness | ≤ 32 HRC |
Density | Approx. 7.8 g/cm³ |
Super Duplex Steel Pricing Information
Product Type | Product Form | Typical Ordering Basis | Pricing |
Super Duplex Pipes and Tubes | Seamless and Welded | Size, schedule, length, quantity | Price on Request |
Super Duplex Plates | Standard and cut to size | Thickness, width, length, quantity | Price on Request |
Super Duplex Sheets | Hot rolled and cold rolled | Thickness, finish, coil or sheet format | Price on Request |
Custom Sizes and Specifications | As per drawings | Project specs and inspection requirements | Price on Request |
Note: The table is provided for estimation and planning only. Final pricing depends on grade (UNS S32750 or UNS S32760), size or thickness, finish, quantity, inspection and documentation requirements, and prevailing raw material conditions. Share your requirement to receive a detailed quotation.
Applications of Super Duplex Steel
Super Duplex stainless steel products are widely used in demanding industrial environments where high mechanical strength and superior corrosion resistance are essential. Pipes, tubes, plates, and sheets manufactured from Super Duplex steel are commonly applied in the following areas:
- Oil and gas production systems, including offshore platforms and subsea piping
- Chemical and petrochemical processing plants handling aggressive media
- Marine structures exposed to seawater and chloride-rich environments
- Heat exchangers, condensers, and process equipment
- Pressure vessels and storage tanks operating under high pressure
- Desalination plants and water treatment facilities
- Structural components for offshore and coastal infrastructure
- Piping systems for power generation and energy projects
This expanded usage demonstrates the suitability of Super Duplex steel for long-term service in corrosive and high-load conditions.
Explore Other High Performance Alloy Materials
Stellar Alloys offers a broad portfolio of high performance alloy materials to support engineering, fabrication, and industrial procurement requirements across diverse operating conditions.
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Why Choose Stellar Alloys for Super Duplex Steel
Stellar Alloys is the company that offers Super Duplex steel pipes, tubes, plates, and sheets with great attention to the material reliability, and specification compliance as well as to the suitability of the materials to use. Our strategy puts us in the position where we focus on the needs of the end-use population, and then provide the products that are at relevant standards on the international level.
Our Super Duplex materials are selected to resist corrosion, ensure a high level of mechanical performance, and dimensional precision, which supports industrial customers. The supply is handled with care to check the grade, documentation, and homogeneity between batches to address the project and operational requirements.
Stellar Alloys has been collaborating with engineering departments, procurement departments and project managers to make sure that Super Duplex steel products are distributed in tandem with the technical specifications, delivery schedules and application needs. This is a transparent and well-organized method of sourcing that allows reliable sourcing of not only regular supply but also urgent industrial requirements.
Frequently Asked Questions About Super Duplex Steel
Super Duplex stainless steel is used in applications that require high mechanical strength and superior corrosion resistance. It is commonly used for pipes, tubes, plates, and sheets in oil and gas, offshore, marine, chemical processing, and pressure equipment applications where exposure to chlorides and high pressure is expected.
Super Duplex 2507 is a high-alloy stainless steel grade designated as UNS S32750. It offers higher chromium, molybdenum, and nitrogen content than standard duplex grades, resulting in improved resistance to pitting, crevice corrosion, and stress corrosion cracking.
Commonly supplied Super Duplex grades include UNS S32750 (Super Duplex 2507) and UNS S32760. These grades are selected based on corrosion resistance requirements, operating temperature, and mechanical performance needed for the application.
Titanium Grade 1 and Grade 2 are widely used for corrosion resistance, while Titanium Grade 5 is selected for higher strength requirements.
Yes, Super Duplex steel pipes, tubes, plates, and sheets are widely used in offshore and marine environments. Their resistance to chloride-induced corrosion and high strength make them suitable for seawater exposure, offshore platforms, and coastal installations.
Pricing for Super Duplex steel products depends on grade, product form, dimensions, quantity, inspection requirements, and current raw material conditions. Because these factors vary by application, pricing is typically provided on a price on request basis after reviewing technical requirements.
Super Duplex steel pipes and tubes are commonly supplied to standards such as ASTM A790, while plates and sheets are supplied in accordance with applicable ASTM and EN material standards based on grade. Exact standards depend on the product form and end-use requirement.
The main difference lies in alloy content and performance. Super Duplex stainless steel contains higher levels of chromium, molybdenum, and nitrogen, which provide greater corrosion resistance and higher strength compared to standard Duplex stainless steel. This makes Super Duplex suitable for more aggressive service conditions.