Super Duplex Stainless Steel Sheet
At Stellanox Steel, we supply premium-quality Super Duplex Stainless Steel Plates crafted to deliver ultra-high strength, superior corrosion resistance, and long-lasting durability in the world’s harshest environments.
Ideal for heavy-duty offshore, petrochemical, marine, and industrial structural applications, our Super Duplex plates ensure maximum reliability and performance — even in high-pressure, high-temperature, and chloride-rich conditions.
What are Super Duplex Stainless Steel Plate?
Super Duplex Stainless Steel Plates are thick, flat-rolled sections produced from super duplex alloys like UNS S32750 (2507) and S32760 (Zeron 100).
Characterized by their dual-phase ferritic-austenitic microstructure, these plates offer twice the strength of standard austenitic stainless steels and superior corrosion resistance against pitting, crevice corrosion, and stress corrosion cracking.
Super Duplex plates are widely used where aggressive environments meet heavy structural demands — allowing thinner, lighter structures without sacrificing strength or durability.
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Stainless Steel |
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Carbon Steel |
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Duplex Stainless Steel |
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Super Duplex Stainless Steel |
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Alloy Steel |
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Titanium |
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Hastelloy |
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Inconel |
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Monel |
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Aluminium |
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Copper |
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Pure Nickel |
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Flanges |
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Forged Fittings |
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Valves |
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Fasteners |
Key Features of Super Duplex Stainless Steel Plate
- Ultra-High Mechanical Strength: Supports extreme loads while reducing weight.
- Exceptional Resistance to Chloride Attack: Outstanding protection against pitting and crevice corrosion.
- Superior Fatigue and Impact Strength: Ideal for dynamic and cyclic loading applications.
- Excellent Weldability and Fabrication: Can be formed, cut, and welded with controlled procedures.
- Cost-Effective Alternative to Nickel Alloys: Offers similar or better performance at lower material cost.
- Long Service Life in Harsh Environments: Extended operation in marine, chemical, and offshore settings.
Super Duplex Stainless Steel Plate Products
Super Duplex Stainless Steel Sheet
Super Duplex Stainless Steel Plate
Super Duplex Stainless Steel Pipe
Super Duplex Stainless Steel Tube
Super Duplex Stainless Steel Bar
Specification Chart –Super Duplex Stainless Steel Plate
| Property | Details |
|---|---|
| Product | Super Duplex Stainless Steel Plate |
| Common Grades | UNS S32750 (2507), UNS S32760 (Zeron 100) |
| Manufacturing Standards | ASTM A240, ASME SA240, EN 10088-2, NORSOK MDS D55 |
| Thickness Range | 6 mm to 150 mm |
| Width Range | 1000 mm to 3000 mm |
| Length Range | 2000 mm to 12000 mm (Custom lengths available) |
| Surface Finish Options | Hot Rolled, Annealed & Pickled (HRAP), Polished, Blasted |
| Plate Edges | Mill Edge, Trimmed Edge |
| Heat Treatment | Solution Annealed and Quenched |
| Testing and Certification | EN 10204 3.1/3.2, NACE MR0175/ISO 15156, ASTM A923 Compliance |
Chemical Composition Chart – Super Duplex Stainless Steel Plate
| Element | Symbol | Composition (%) |
|---|---|---|
| Carbon | C | ≤ 0.030 |
| Chromium | Cr | 24.0 – 26.0 |
| Nickel | Ni | 6.0 – 8.0 |
| Molybdenum | Mo | 3.0 – 5.0 |
| Nitrogen | N | 0.24 – 0.32 |
| Manganese | Mn | ≤ 1.2 |
| Silicon | Si | ≤ 0.8 |
| Phosphorus | P | ≤ 0.035 |
| Sulfur | S | ≤ 0.020 |
| Iron | Fe | Balance |
Mechanical Properties Chart –Super Duplex Stainless Steel Plate
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥ 795 |
| Yield Strength (0.2% Proof, MPa) | ≥ 550 |
| Elongation (%) | ≥ 15 |
| Hardness (Brinell HB) | ≤ 300 |
| Charpy Impact Energy (@ -46°C) | ≥ 45 Joules |
Equivalent Grades Chart – Super Duplex Stainless Steel Plate
| Standard | Equivalent Grade |
|---|---|
| ASTM | A240 S32750, A240 S32760 |
| UNS | S32750 (2507), S32760 (Zeron 100) |
| EN | 1.4501, 1.4410 |
| DIN | X2CrNiMoCuWN25-7-4 |
| JIS | SUS 329J4L |
Super Duplex Stainless Steel Plate Weight Chart (kg/m²)
| Thickness (mm) | Weight per m² (kg) | Weight per 1.25 × 2.5 m (kg) | Weight per 4' × 8' (kg) |
|---|---|---|---|
| 6.0 | 47.10 | 147.19 | 139.96 |
| 8.0 | 62.80 | 196.25 | 186.64 |
| 10.0 | 78.50 | 245.31 | 233.32 |
| 12.0 | 94.20 | 294.38 | 279.96 |
| 16.0 | 125.60 | 392.50 | 373.28 |
| 20.0 | 157.00 | 490.63 | 466.60 |
| 25.0 | 196.25 | 613.28 | 583.25 |
| 30.0 | 235.50 | 735.94 | 699.90 |
| 40.0 | 314.00 | 981.25 | 933.20 |
| 50.0 | 392.50 | 1,226.56 | 1,166.50 |
Applications of Super Duplex Stainless Steel Plate in Various Industries
Stellanox Steel’s Carbon Steel products are valued for their strength, machinability, and cost-effectiveness across multiple sectors:
Oil And Gas Industry
Marine Industry
Building And Structural Steel
Power and Energy
Aerospace
Defence
Benefits of Super Duplex Stainless Steel Plate
- Reduced Material Weight with Increased Strength: Lighter designs for heavy structures.
- Superior Corrosion and Erosion Resistance: Longer lifespan in harsh environments.
- High Toughness and Fatigue Resistance: Withstands cyclic and impact loading.
- Excellent Fabrication and Welding Capabilities: Easy field fabrication when using controlled procedures.
- Lower Total Lifecycle Costs: Savings in maintenance, downtime, and replacement.
- Eco-Friendly Material: Fully recyclable and energy-efficient in production.
Frequently Asked Questions
Explore our FAQs for insights on materials, customization, and delivery.
Why choose Super Duplex Stainless Steel Plates over 316 or 904L plates?
Super Duplex plates provide higher mechanical strength and better corrosion resistance, especially in high chloride environments, compared to 316 or 904L stainless steel.
Can Super Duplex plates be used in cryogenic applications?
Yes, Super Duplex maintains good toughness and impact strength at very low temperatures.
Are special welding techniques required for Super Duplex stainless plates?
Yes. While weldable, strict control over heat input and filler material selection ensures the best results for maintaining balanced microstructure.
What industries benefit the most from Super Duplex plates?
Industries like offshore oil & gas, chemical processing, marine engineering, desalination, and heavy infrastructure greatly benefit from Super Duplex stainless steel plates.
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2025 Stellanox Steel |