Super Duplex Steel Plate Specifications
The specification table below outlines the key procurement details for Super duplex steel plate. Plates for pressure vessel service conform to ASME SA-240. Offshore projects often require NORSOK MDS D55 qualification as well.
| Parameter | Detail |
|---|---|
| Standard | ASTM A240 / ASME SA-240 |
| Thickness | 3 mm to 150 mm |
| Width | Up to 2500 mm |
| Length | Up to 12000 mm |
| Surface Finish | Hot Rolled (No.1), Cold Rolled (2B, No.4) |
| Types | NACE MR0175 / ISO 15156 (for sour service, subject to hardness limits) |
Super Duplex Steel Plate Sizes
The table below breaks down the available size ranges and standard finishes for Super duplex steel plates based on their thickness.
Super Duplex Steel Plate Size and Finish Chart
| Thickness Range | Production Method | Standard Finish | Maximum Width |
|---|---|---|---|
| 3 mm to 6 mm | Cold Rolled | 2B Finish (Smooth) | 1500 mm |
| Over 6 mm to 50 mm | Hot Rolled | No.1 Finish (Dull) | 2500 mm |
| Over 50 mm to 150 mm | Hot Rolled (Quarto) | No.1 Finish (Dull) | 2000 mm |
Super Duplex Steel Plate Price
Super duplex steel plate typically costs from about Rs 800/kg in India and $10-15/kg in international markets. Final prices depend on grade, thickness, surface finish and order quantity. Because nickel and molybdenum follow global commodity prices, surcharges can change monthly and affect overall cost.
For an accurate quote, please specify the precise grade, dimensions, and quantity you're looking for. Sachiya Steel International offers competitive pricing.
Super Duplex Steel Plate Grades
We offer super duplex steel plate in grade 2507. This grade is engineered for demanding environments, where the capabilities of standard duplex or austenitic grades are not sufficient.
Grade 2507 (S32750 / SAF 2507)
Super Duplex Grade 2507 (S32750 / SAF 2507) plate is the most common super duplex plate. Its high chromium, molybdenum, and nitrogen content gives it a pitting resistance equivalent number (PREN) of about 43, which results in excellent corrosion resistance.
Super Duplex Steel Plate Forms
Hot-rolled Super Duplex Steel Plate
Cold-rolled Super Duplex Steel Plate
Industrial Applications of Super Duplex Steel Plate
In industries where equipment faces salt-rich environments and heavy loads, super duplex steel plate is commonly used. The main requirement is pitting resistance above PREN 40. Four major industries use it, as outlined below.
Oil & Gas Industry
Process vessels, separators, and manifolds rely on the SDSS plate for pressure containment in sour service conditions offshore. Flow line components are another common use.
Chemical Processing
Reactor vessels and heat exchangers built from super duplex plate handle sulphuric and phosphoric acids. Organic acids are also well tolerated, unlike with lower-alloy steels.
Offshore & Marine Structures
NORSOK MDS D55 qualified super duplex plate is specified for structural members and risers in North Sea operations. Seawater-exposed components are a particular focus.
Desalination & Water Treatment
The alloy's ability to resist hot, high-chloride water at elevated temperatures is especially useful for evaporator plates and brine heaters used in desalination plants.
Super Duplex Steel Plate vs Duplex Steel Plate
The comparison table below highlights the key differences between Super duplex plate (PREN >40), which provides nearly double the yield strength and significantly higher pitting resistance compared to standard duplex 2205 plate (PREN ~35).
| Property | Super Duplex 2507 | Duplex 2205 |
|---|---|---|
| PREN | >40 (~43) | ~35 |
| Tensile Strength (min) | 116 ksi (800 MPa) | 90 ksi (620 MPa) |
| Yield Strength (min) | 80 ksi (550 MPa) | 65 ksi (450 MPa) |
| Elongation (min) | 15% | 25% |
| Chromium | 24.0-26.0% | 22.0-23.0% |
| Molybdenum | 3.0-5.0% | 3.0-3.5% |
| Nitrogen | 0.24-0.32% | 0.14-0.20% |
Super duplex plate costs more because of its higher alloy content, but its higher strength allows you to use thinner plates, cutting total weight and helping offset the higher price per kg.
Shipping & Packaging
Heavy-duty wooden boxes Packing
We strictly follow seaworthy export handling standards to protect super duplex steel plate from transit damage, moisture ingress, and surface contamination during long-distance dispatch.
- Heavy-duty wooden boxes with moisture barrier lining
- HDPE stretch film wrapping on all bundles
- Edge and corner protection with plastic padding
- Silica gel desiccants to minimize moisture exposure
- ISPM-15 fumigated wooden packaging for export
Plate Bundle Yard Staging
Plate Bundle Edge Protection
Wrapped Export-Ready Bundles
We Export Worldwide
Sachiya Steel International supplies super duplex steel products to major industrial markets across North America, Europe, the Middle East, Asia and Africa with export-ready documentation and logistics support.
USA
Canada
Germany
UK
Italy
France
Australia
South Korea
Indonesia
Vietnam
Singapore
Malaysia
Taiwan
UAE
Saudi Arabia
Qatar
Oman
South Africa
Nigeria
Egypt