Super Duplex 2507 (UNS S32750) Seamless Pipes & Tubes
Super Duplex 2507 (UNS S32750) is the premier super duplex stainless steel with PREN > 42, providing exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking in the most aggressive chloride environments. Its yield strength of 550 MPa is more than double that of 316L.
Size Range
1/4" NPS to 10" NPS (6.35mm to 273.1mm OD)
Wall Thickness
SCH 5S to SCH 80S
Standards
4 specs
Chemical Composition (% by weight)
| C | Mn | Si | Cr | Ni | Mo | N | P | S |
|---|---|---|---|---|---|---|---|---|
| 0.030 max | 1.20 max | 0.80 max | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 | 0.035 max | 0.020 max |
Mechanical Properties (Minimum at Room Temperature)
| Tensile Strength | Yield Strength | Elongation | Hardness |
|---|---|---|---|
| 795 MPa min | 550 MPa min | 15% min | 32 HRC max |
Physical Properties - Super Duplex 2507
| Density | Melting Range | Thermal Conductivity | Electrical Resistivity | Specific Heat | Coeff. of Thermal Expansion |
|---|---|---|---|---|---|
| 7.79 g/cm3 | 1350-1400 C | 14 W/m-K | 880 nOhm-m | 480 J/kg-K | 13.0 um/m-C |
Corrosion Resistance - Super Duplex 2507
| Property | Value |
|---|---|
| Pitting Resistance (PREN) | >42 (typ. 42-44) |
| Max Service Temp (Oxidizing) | 315 C |
| Intergranular Corrosion | Highly resistant |
| Stress Corrosion Cracking | Outstanding resistance |
| General Corrosion Rate | <0.01 mm/yr |
| Seawater Resistance | Excellent up to 35C |
Equivalent International Grades
| ASTM | NORSOK | Trade |
|---|---|---|
| S32750 | MDS D56 | SAF 2507 |
Super Duplex 2507 vs Comparable Grades
| Grade | UNS | Tensile | Yield | PREN | Max Temp |
|---|---|---|---|---|---|
| Duplex 2205Duplex Stainless Steel | S32205 | 655 MPa min | 450 MPa min | ~35 | 315 C (to avoid 475C embrittlement) |
| Super Duplex Zeron 100Super Duplex Stainless Steel | S32760 | 750 MPa min | 550 MPa min | >40 (W-enhanced) | 315 C |
| Alloy 625Nickel-Chromium-Molybdenum Alloy | N06625 | 827 MPa min | 414 MPa min | >50 (exceptional) | 980 C |
Applicable Standards
Applications
Key Advantages of Super Duplex 2507
Super Duplex 2507 Applications by Region
Middle East (UAE, Saudi Arabia, Qatar, Oman, Kuwait)
Premium grade for ADNOC, Saudi Aramco, and QatarEnergy offshore and subsea projects. Standard for seawater systems in GCC countries.
Europe (Germany, UK, Norway, Netherlands, Italy)
NORSOK standard for North Sea deepwater operations. Specified by Equinor, Shell, and BP for critical service.
United States
Used in deepwater Gulf of Mexico operations and the most demanding chemical processing applications.
Frequently Asked Questions about Super Duplex 2507 Seamless Pipes
Quick Specifications
1/4" NPS to 10" NPS (6.35mm to 273.1mm OD)
SCH 5S to SCH 80S
Industries Served
Related Grades
Compare With
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Stancor is India's leading manufacturer of Super Duplex 2507 seamless pipes, exporting to UAE, Saudi Arabia, Qatar, Germany, UK, and USA. Contact our sales team for competitive pricing, fast delivery, and full material certification.