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Super Duplex 2507 Overview
Super Duplex 2507 (UNS S32750) is a high-alloy stainless steel designed for applications which demand exceptional strength and corrosion resistance. It contains 25% chromium, 4% molybdenum, and 7% nickel. This combination results in a material with a Pitting Resistance Equivalent Number (PREN) of >41, making it virtually immune to pitting and crevice corrosion in hot seawater. Alloy 2507 also exhibits high mechanical strength, roughly triple that of standard 316L, and excellent ductility. Steel Emporium supplies Grade 2507 pipes primarily for the offshore oil and gas industry, desalination plants, and aggressive chemical processing units.
Key Advantages & Features
Max Pitting Resistance
PREN >41 ensures immunity to localized corrosion in warm saline environments.
Ultra-High Strength
Offers nearly triple the yield strength of standard austenitic 316L pipes.
Lower Design Weight
Higher strength allows for thinner walls, reducing overall project material weight.
| Grade | C | Cr | Ni | Mo | N | Mn | Si | P | S |
|---|---|---|---|---|---|---|---|---|---|
| UNS S32750 | 0.030 max | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 | 1.20 max | 0.80 max | 0.035 | 0.020 |
| Property | Minimum Value (Super Duplex 2507) |
|---|---|
| Tensile Strength (MPa) | 795 MPa (116 ksi) |
| Yield Strength 0.2% Offset (MPa) | 550 MPa (80 ksi) |
| Elongation (% in 50mm) | 15% min |
| Hardness (Rockwell C) | 32 HRC max |
| PREN (Cr + 3.3Mo + 16N) | 41.0 min |
| Density (kg/m³) | 7800 |
| UNS | Werkstoff No. | EN Name | Common Name |
|---|---|---|---|
| S32750 | 1.4410 | X2CrNiMoN25-7-4 | Super Duplex 2507 / SAF 2507 |
Frequently Asked Questions
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