AISI 2507 Super Duplex Stainless Steel
Mar 18, 2026
Leave a message
AISI 2507 super duplex stainless steel exhibits a balanced microstructure consisting of approximately 50% austenite and 50% ferrite phases. This dual-phase structure provides exceptional strength-to-weight ratio and superior corrosion resistance compared to conventional austenitic stainless steels. The high chromium, molybdenum, and nitrogen content contributes to outstanding pitting and crevice corrosion resistance, with a PREN (Pitting Resistance Equivalent Number) exceeding 40.
Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.030 |
| Manganese (Mn) | ≤ 1.20 |
| Silicon (Si) | ≤ 0.80 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.020 |
| Chromium (Cr) | 24.0 - 26.0 |
| Nickel (Ni) | 6.0 - 8.0 |
| Molybdenum (Mo) | 3.0 - 5.0 |
| Nitrogen (N) | 0.24 - 0.32 |
| Copper (Cu) | ≤ 0.50 |
| Tungsten (W) | ≤ 0.50 |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Rm) | ≥ 800 MPa |
| 0.2% Proof Strength (Rp0.2) | ≥ 550 MPa |
| Elongation (A5) | ≥ 15% |
| Hardness (HRC) | ≤ 32 |
| Impact Energy (KV) at 20°C | ≥ 60 J |
| Impact Energy (KV) at -40°C | ≥ 40 J |
| Fatigue Limit (10^7 cycles) | 350 MPa |
| Young's Modulus | 200 GPa |
| Shear Modulus | 80 GPa |
| Poisson's Ratio | 0.27 |
Send Inquiry