2507 super duplex stainless steel (UNS S32750) is a premium super duplex grade designed for highly demanding applications. It contains approximately 25% chromium, 4% molybdenum, and 0.3% nitrogen, giving it an outstanding Pitting Resistance Equivalent Number (PREN > 40). 2507 offers exceptional resistance to chloride stress corrosion cracking, pitting, and crevice corrosion, along with a very high yield strength (≥550 MPa). Designated as S25073 (GB/T, China) and 1.4410 (EN, Europe).
Chemical Composition
Typical chemical composition (% by mass) per ASTM A240 / EN 10088.
| Grade | C (%) | Cr (%) | Ni (%) | Mo (%) | N (%) |
|---|---|---|---|---|---|
| 2507 / S32750 | ≤0.03 | 24.0–26.0 | 6.0–8.0 | 3.0–5.0 | 0.24–0.32 |
Note: High Chromium (Cr), Molybdenum (Mo), and Nitrogen (N) content results in a PREN (Pitting Resistance Equivalent Number) greater than 40, providing exceptional pitting and crevice corrosion resistance in harsh chloride environments.
Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| 2507 | ≥550 | ≥800 | ≥15 | ≤310 |
Available Sizes & Delivery
| Thickness (Plate/Sheet) | 0.5–100 mm |
| Diameter (Round Bar) | 10–300 mm |
| Forms Available | Plate, coil, round bar, seamless/welded pipe, flange, forging |
| Standard | ASTM A240 / ASTM A789 / EN 10088 |
| Mill Test Certificate | EN 10204 3.1 with every shipment |
| MOQ | 3 Tons |
| Delivery Time | Within 10-20 days (≤500 tons) |
Why Order from Zhongtang Steel?
- Ultimate Corrosion Resistance — PREN > 40, ideal for severe chloride and acidic
