Super Duplex Stainless Steel Tube
Stellanox Steel supplies high-performance Super Duplex Stainless Steel Tubes, built for extreme strength, superior corrosion resistance, and long-term durability in the world’s harshest environments.
Engineered for offshore, marine, chemical, and power generation applications, our super duplex tubes are the preferred choice for fluid and gas transport systems requiring both high pressure and resistance to aggressive elements like chlorides and acids.
What are Super Duplex Stainless Steel Tube?
Super Duplex Stainless Steel Tubes are hollow, cylindrical sections manufactured from super duplex grades such as UNS S32750 (2507) and UNS S32760 (Zeron 100).
These tubes exhibit a dual-phase (austenitic-ferritic) structure that combines the high strength of ferritic steel with the corrosion resistance of austenitic stainless steel.
Super Duplex tubes deliver excellent performance in environments that demand resistance to stress corrosion cracking, pitting, and erosion — particularly in seawater, sour gas, and chemical process streams.
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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 Tube
- High Yield & Tensile Strength: Offers 2X the strength of 304L/316L stainless steel.
- Superior Corrosion Resistance: Performs in aggressive chloride and acid environments.
- Exceptional Fatigue & Impact Resistance: Ideal for systems with mechanical vibration or cyclic loading.
- Good Weldability & Fabrication: Suitable for field welding with proper procedures.
- Tight Tolerance Machining Possible: Excellent dimensional precision for heat exchanger and instrumentation use.
- Long-Term Cost Savings: Reduced maintenance, fewer failures, longer life cycle.
Super Duplex Stainless Steel Tube 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 Tube
| Property | Details |
|---|---|
| Product | Super Duplex Stainless Steel Tube |
| Common Grades | UNS S32750 (2507), UNS S32760 (Zeron 100) |
| Manufacturing Standards | ASTM A789 (Seamless & Welded Tubes), ASTM A790, EN 10216-5 |
| Tube Types | Seamless, Welded, Cold Drawn Seamless (CDS), U-Bend (for HX) |
| Outer Diameter Range | 6 mm to 273 mm (1/4" to 10" NB) |
| Wall Thickness | 0.5 mm to 12.7 mm |
| Length Range | 6 meters, 12 meters, U-bent/custom lengths available |
| Surface Finish Options | Annealed & Pickled, Bright Annealed, Polished, Bead Blasted |
| End Types | Plain End (PE), Beveled End (BE), Threaded End (TE) |
| Testing and Certification | Hydro Test, Eddy Current, PMI, UT, EN 10204 3.1/3.2, NACE MR0175/ISO 15156 |
Chemical Composition Chart – Super Duplex Stainless Steel Tube
| 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 Tube
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥ 795 |
| Yield Strength (0.2% Proof, MPa) | ≥ 550 |
| Elongation (%) | ≥ 15 |
| Hardness (Brinell HB) | ≤ 300 |
| Impact Toughness (@ -46°C) | ≥ 45 Joules |
Equivalent Grades Chart – Super Duplex Stainless Steel Tube
| Standard | Equivalent Grade |
|---|---|
| ASTM | A789 S32750 / S32760 |
| UNS | S32750 (2507), S32760 |
| EN | 1.4501, 1.4410 |
| DIN | X2CrNiMoCuWN25-7-4 |
| JIS | SUS 329J4L |
Super Duplex Stainless Steel Tube Weight Chart (kg/m²)
| OD (mm) | Wall Thickness (mm) | Weight per Meter (kg) | Weight per 3 m / 6 m (kg) |
|---|---|---|---|
| 6.0 | 1.0 | 0.12 | 0.36 / 0.72 |
| 8.0 | 1.0 | 0.17 | 0.51 / 1.02 |
| 10.0 | 1.0 | 0.22 | 0.66 / 1.32 |
| 12.7 | 1.2 | 0.28 | 0.84 / 1.68 |
| 15.0 | 1.5 | 0.38 | 1.14 / 2.28 |
| 19.05 | 1.5 | 0.50 | 1.50 / 3.00 |
| 25.4 | 2.0 | 0.95 | 2.85 / 5.70 |
| 38.1 | 2.5 | 1.71 | 5.13 / 10.26 |
| 50.8 | 3.0 | 2.78 | 8.34 / 16.68 |
Applications of Super Duplex Stainless Steel Tube 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 Tube
- Twice the Strength of Austenitic Tubes: Supports higher pressures and longer spans
- Superior Pitting and SCC Resistance: Especially effective in chloride and sour service
- Easy Fabrication and Field Installation: Excellent weldability and machining behavior
- High Reliability in Critical Systems: Reduces downtime and failure risk
- Eco-Friendly & Fully Recyclable: Sustainable material for modern infrastructure
Frequently Asked Questions
Explore our FAQs for insights on materials, customization, and delivery.
What’s the difference between Super Duplex tube and pipe?
Tube is specified by precise OD and wall thickness for mechanical and structural use, while pipe is sized for fluid transport by nominal bore (NB).
Can Super Duplex tubes be used in acidic and chloride-rich conditions?
Absolutely. These tubes are specifically designed for aggressive environments with high chlorides and acids.
Are Super Duplex tubes suitable for U-bending and coiling?
Yes. Cold-drawn Super Duplex tubes with proper heat treatment can be bent into U-shapes for heat exchangers.
Which is better: UNS S32750 or UNS S32760?
Both have similar corrosion and mechanical performance, but S32760 (Zeron 100) includes additional copper and tungsten for enhanced resistance in some applications.
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