Super Duplex is the ultimate evolution of dual-phase stainless steels, featuring 25% Chromium and enhanced Molybdenum content. Engineered for the most demanding environments, it offers world-class resistance to pitting and crevice corrosion in warm seawater, far exceeding the capabilities of standard Duplex and high-nickel stainless steels.
Designed with a high Pitting Resistance Equivalent Number (PREN), Super Duplex 2507 provides total reliability for high-pressure subsea manifolds, desalination high-pressure pumps, and aggressive chemical processing units. It delivers exceptional mechanical strength, allowing for the most weight-efficient engineering designs.
| Grade | Cr (Chromium) | Ni (Nickel) | Mo (Molybdenum) | N (Nitrogen) | Cu (Copper) | W (Tungsten) | C (Carbon) | Mn (Manganese) | Si (Silicon) |
|---|---|---|---|---|---|---|---|---|---|
| Super Duplex 2507 (S32750) | 24.0 - 26.0 | 6.0 - 8.0 | 3.0 - 5.0 | 0.24 - 0.32 | 0.50 max | - | 0.030 max | 1.20 max | 0.80 max |
| Super Duplex S32760 (F55) | 24.0 - 26.0 | 6.0 - 8.0 | 3.0 - 4.0 | 0.20 - 0.30 | 0.5 - 1.0 | 0.5 - 1.0 | 0.030 max | 1.00 max | 1.00 max |
| Grade | Tensile Strength (MPa) | Yield Strength (0.2% Offset MPa) | Elongation (%) | Hardness (Brinell / HRC) | PREN Value | Density (kg/m³) |
|---|---|---|---|---|---|---|
| Super Duplex 2507 | 800 - 1000 | 550 min | 25% min | 310 max / 32 HRC | ≥ 41 | 7810 |
| Super Duplex S32760 | 750 - 1000 | 550 min | 25% min | 270 max / 28 HRC | ≥ 40 | 7810 |
Deep-Sea Critical Grade
Elite seamless and welded piping solutions designed for the most aggressive environments. With a 25% Chromium content, these pipes offer unmatched resistance to pitting and crevice corrosion in warm seawater and high-pressure subsea conditions.
High-Pitting Resistance
High-performance buttweld and forged fittings engineered to maintain a PREN value of 40+. These components are essential for maintaining the integrity of desalination brine heaters and offshore firewater systems.
Corrosion Mastery Plate
Industrial-grade flat products for fabricating high-pressure vessels, FGD scrubbers, and subsea manifold covers. Offers extreme impact strength and structural durability in hyper-saline chemical media.
Extreme Pressure Sealing
Heavy-duty forged flanges (F53/F55) providing a secure, leak-proof seal for offshore flowlines and chemical headers. Specifically resistant to erosion-corrosion caused by high-velocity seawater.
High-Fatigue Shafting
Precision-engineered bars for pump shafts, propeller shafts, and critical fasteners. Features excellent fatigue resistance and high yield strength even in cryogenic applications.
Dhanavir Steel is a premier stockholder and global supplier of high-performance Stainless Steel, Special Alloys and Nickel Alloys.
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Dhanavir Steel provides end-to-end industrial steel solutions, specializing in Pipes, Fittings, and Flanges. We combine technical expertise in NACE and IBR testing with a robust global supply chain to deliver quality-assured materials for demanding environments.
Dhanavir Steel provides end-to-end industrial steel solutions, specializing in Pipes, Fittings, and Flanges. We combine technical expertise in NACE and IBR testing with a robust global supply chain to deliver quality-assured materials for demanding environments.