Super Duplex Stainless Steel Coil
Super Duplex Stainless Steel Coil provides exceptional strength and superior corrosion resistance for demanding industrial applications. Available in hot and cold-rolled formats, with multiple surface finishes and international standard compliance.
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🔹 Product Overview
Super duplex stainless steel coil is designed for extreme corrosion resistance and mechanical strength in demanding industrial applications. Combining austenitic and ferritic microstructures, these coils provide superior resistance to chloride-induced stress corrosion cracking and pitting. They are commonly used for heat exchangers, pressure vessels, seawater desalination plants, and other high-performance fabrication needs.
🔹 Application Areas
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Heat exchanger tubing and plate heat exchangers
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Pressure vessel and boiler cladding
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Offshore structural components
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Chemical and petrochemical process lines
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Desalination and marine systems
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Pulp and paper industry
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Food processing and pharmaceutical machinery
🔹 Product Features
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Outstanding corrosion resistance in seawater and aggressive media
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Higher strength than conventional 300 series stainless steels
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Excellent weldability and formability
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Stable performance at elevated and sub-zero temperatures
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Minimal thermal expansion with excellent fatigue resistance
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Available in slit coils, strips, and custom widths
🔹 Technical Specifications
| Parameter | Range |
|---|---|
| Thickness | 0.3 mm – 6.0 mm (approx. ¹⁄₁₂₈″ – ¼″) |
| Width | 100 mm – 2000 mm (approx. 4″ – 78¾″) |
| Coil ID / OD | 508 mm / up to 1800 mm (approx. 20″ / 70⅞″) |
| Grades | UNS S32750, S32760, S39274 |
| Tolerances | According to ASTM A480 / EN 10051 |
| Surface Finish | 2B, BA, No.1, No.4, HRAP, polished |
| Standards | ASTM A240 / A480, ASME SA240, EN 10028-7 |
🔹 Manufacturing Process
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Raw material melting and refining
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Hot rolling or cold rolling to target thickness
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Solution annealing and water quenching
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Surface finishing (pickling, polishing, brushing)
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Coil slitting or edge trimming
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Dimensional and surface inspection
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Packaging with rust-proof wrapping and export protection
🔹 FAQ
Q1: What is the difference between duplex and super duplex coils?
A1: Super duplex coils contain higher chromium, molybdenum, and nitrogen content, offering greater strength and pitting resistance than duplex.
Q2: Can the coil be cut into strip or sheet form?
A2: Yes, we offer precision slitting services to produce strips or blanked sheets from coil.
Q3: Is it suitable for welding applications?
A3: Yes, super duplex coils can be welded with proper filler material and heat control to avoid phase imbalance.
Q4: What surface finishes are available?
A4: Available finishes include 2B, No.1, No.4, polished, and HRAP, depending on customer requirements.
Q5: Are customized coil widths and inner diameters possible?
A5: Yes, coil width, thickness, and ID/OD can be tailored based on project specifications.
🔹 Still Have Questions?
Feel free to contact us to discuss your coil requirements or request a technical quotation. We provide customized specifications, mill certifications, and fast global delivery.
