ALLOYS
2507 Super Duplex
2507 Super Duplex is a super duplex stainless steel with 25% chromium, 4% molybdenum, and 7% nickel designed for demanding applications which require exceptional strength and corrosion resistance, such as chemical process, petrochemical, and seawater equipment. The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity, and a low coefficient of thermal expansion. The high chromium, molybdenum, and nickel levels provide excellent resistance to pitting, crevice, and general corrosion.
UNS: S32750
Stock Sizes: 1/4” – 1” OD
Specifications:
- Seamless Tube: ASTM A789
- NACE MR0175/MR0103
Available Processing:
- Cold Worked and Bright Annealed
Common Testing: Eddy Current, Flare, Flattening, Positive Material Identification
Chemical Composition (%)
| Chemical | Percentage |
|---|---|
| Iron (Fe) | Balance |
| Chromium (Cr) | 24-26% |
| Nickel (Ni) | 6-8% |
| Molybdenum (Mo) | 3-5% |
| Manganese (Mn) | 1.20% Max |
| Silicon (Si) | 0.80% Max |
| Copper (Cu) | 0.50% Max |
| Carbon (C) | 0.030% Max |
| Chemical | Percentage |
|---|---|
| Sulfur (S) | 0.020% Max |
| Phosphorus (P) | 0.035% Max |
| Nitrogen (N) | 0.24-0.32% |
| – | – |
| – | – |
| – | – |
| – | – |
| – | – |
Physical Properties
| Property | Measurement |
|---|---|
| Density (lb/in3) | 0.280 |
| Elongation (min %) | 15 |
| Minimum Yield (psi) | 80,000 |
| Minimum Tensile (psi) | 116,000 |
| Max Hardness (HRC) | 32 |