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Super Duplex Stainless Steels – Ultimate Strength Meets Superior Corrosion Resistance
UNS S32750 / S32760 (2507) duplex stainless combines outstanding pitting resistance and mechanical strength. Designed for seawater, chemical, and high-pressure industrial systems.
What Is Super Duplex Stainless Steel?
Super duplex stainless steel is a high alloy dual-phase (ferritic-austenitic) material with:
Twice the yield strength of 304/316
Excellent resistance to pitting, crevice, and stress corrosion cracking (SCC)
Designed for aggressive chloride-rich environments
Good weldability and mechanical performance at high pressure
These steels are widely used when both strength and corrosion resistance are required, making them ideal for structural and process-critical systems.
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Optional product specifications
| Grade | UNS No. | PREN | Main Feature |
|---|---|---|---|
| 2507 | S32750 | 42–45 | High strength + seawater & acid corrosion resistance |
| Zeron® 100 | S32760 | 45–50 | Higher impact resistance + erosion/corrosion resistance |
| F55 / 1.4501 | — | 45+ | Equivalent to S32760 |
Standards: ASTM A240 / A479 / A182 / A789 / A790 / EN 10088
Forms: Plate, pipe, tube, bar, forged block, flange, fitting
Dimensions:
• Plate: 3mm – 80mm
• Bar: Ø10mm – 300mm
Pipe: NPS 1/2” – 24”, SCH10–XXS
Condition: Solution Annealed
Processing & Packaging
Cutting: Saw, waterjet, laser, plasma
Forged bar or block for custom machining
Pickled, polished, and rough turned finish options
Custom ID stamping with QR code / heat no.
Seaworthy packaging (pallet + oil seal + crate)
Why Buy From Xishang?
- Certified stock of S32750 / S32760 / Zeron 100
- Dual-phase structure testing (ferrite % balance)
- NACE MR0175 + ASTM + PED documentation
- Machining, forming & welding support available
- PMI, UT, mechanical + corrosion property testing
- Global delivery + fast response
Frequently Asked Questions
Q1: How does Super Duplex differ from regular duplex stainless steel?
A:
Super duplex contains more Cr, Mo, and N, giving higher corrosion resistance and mechanical strength than standard duplex (e.g., 2205).
Q2: What is the maximum chloride level super duplex can handle?
A:
Super duplex like 2507 can typically handle chloride contents up to 1000 ppm depending on temperature and pH.
Q3: Can I weld super duplex materials?
A:
Yes, with proper filler metals (e.g., ERNiCrMo-3) and post-weld cleaning. Ferrite balance should be controlled.
Q4: Is NORSOK or NACE compliance available?
A:
Yes. All our super duplex products can be certified to NACE MR0175 / NORSOK M-650 / ISO 15156 upon request.
Q5: Do you provide forged flanges and pipe fittings?
A:
Absolutely. Elbows, tees, reducers, flanges in S32750/S32760 are available from stock or on order.
Let us know your required grade
When your project demands both superior corrosion protection and high strength in extreme conditions, choose Xishang’s certified super duplex stainless steel.
