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Super Duplex Stainless Steel
Multiple forms & standards.
If you’ve worked in offshore or chemical environments, you already know why Super Duplex stainless steel is a go-to material — and here at PM International, we’ve built our reputation on knowing how to get it right. Whether you’re looking at S32750 or S32760, we supply Super Duplex pipe, tube, flanges, and fittings that hold up where other materials fail. Our clients count on us for demanding applications like desalination plants, subsea systems, and pressure vessels, and we don’t take that trust lightly. We know how to navigate the specs, the logistics, and the real-world requirements that come with using high-performance alloys in harsh environments.
UNS S32750 & UNS S32760
- Super Duplex Plate/Sheet
- Super Duplex Seamless & Welded Tube
- Super Duplex Seamless & Welded Pipe
- Super Duplex Round Bar
- Super Duplex Flanges F53/F55
- Super Duplex Specialty Forgings
- Super Duplex Seamless & Welded BW Fittings
| Trade Name | UNS | Super Duplex Industry Specifications | Chemical Composition | Min.Tensile (KSI) | Min.Yield (KSI) | Elongation % |
|---|---|---|---|---|---|---|
| SAF 2507® | UNS S32750 | ASTM A182 F53, A240, A276, A479, A789, A790, A815, A928, A988 SAE J405 | C 0.030 max Cr 24.0-26.0 Cu 0.5 max Mn 1.20 max Mo 3.0-5.0 N 0.24-0.32 Ni 6.0-8.0 P 0.035 max S 0.020 max Si 0.8 max | 116 | 80 | 15 |
| UNS S32760 | ASTM A182 F55, A240, A276, A314, A473, A479, A789, A790, A815, A928, A988 SAE J405 | C 0.03 max Cr 24.0-26.0 Cu 0.5-1.0 Mn 1.0 max Mo 3.0-4.0 N 0.2-0.3 Ni 6.0-8.0 P 0.03 max S 0.01 max Si 1.0 max W 0.5-1.0 | 109 | 80 | 25 |
Super Duplex is a Duplex alloy stainless steel developed for high strength, resistance to pitting, stress corrosion cracking, erosion corrosion and corrosion fatigue, crevice corrosion and strong weldability.
Super Duplex Applications
Oil and gas industry equipment, Offshore platforms, heat exchangers, process and service water systems, fire-fighting systems, injection and ballast water systems, Chemical process industries, heat exchangers, vessels, and piping, Desalination plants, high pressure RO plants and seawater piping, Mechanical and structural components, high strength, corrosion-resistant parts, Power industry FGD systems, utility and industrial scrubber systems, absorber towers, ducting, and piping.
Super Duplex Corrosion Resistance
Due to the high content of chromium and molybdenum, Super Duplex is extremely resistant to uniform corrosion by organic acids like formic and acetic acid. Furthermore, Super Duplex demonstrates excellent resistance to inorganic acids, especially those containing chlorides.
The pitting resistance equivalent of Super Duplex – calculated by PREN = Cr + 3.3Mo + 16N – will exceed 40 in most material forms.