S32760 (Zeron 100)
UNS S32760
Overview
Super duplex stainless steel with tungsten and copper additions for superior corrosion resistance in the most demanding environments. Higher PREN (≥40) than 2205 with improved performance in hot chloride, sulfuric acid, and sour service. The tungsten addition enhances pitting resistance, while copper provides resistance to sulfuric acid. A direct competitor to 2507 with slightly different optimized properties.
Chemical Composition (wt%)
| Element | Min | Max |
|---|---|---|
| C (Carbon) | — | 0.03 |
| Mn (Manganese) | — | 1 |
| Si (Silicon) | — | 1 |
| P (Phosphorus) | — | 0.03 |
| S (Sulfur) | — | 0.01 |
| Cr (Chromium) | 24 | 26 |
| Ni (Nickel) | 6 | 8 |
| Mo (Molybdenum) | 3 | 4 |
| W (Tungsten) | 0.5 | 1 |
| Cu (Copper) | 0.5 | 1 |
| N (Nitrogen) | 0.2 | 0.3 |
Mechanical Properties
| Property | Value | Condition |
|---|---|---|
| Tensile Strength | ≥ 750 MPa (109 ksi) | — |
| Yield Strength (0.2%) | ≥ 550 MPa (80 ksi) | — |
| Elongation | ≥ 25% | — |
| Hardness | ≤ 28 HRC | annealed |
| Density | 7.8 g/cm³ | — |
Physical Properties
| Property | Value |
|---|---|
| Melting Range | 1350 – 1425 °C |
| Thermal Conductivity | 17 W/m·K (at 100°C) |
| PREN | 40 – 43 |
Corrosion Resistance
Excellent resistance to pitting (PREN ≥ 40) and crevice corrosion in chloride environments. Good resistance to sulfuric acid at low concentrations — the copper addition provides a unique advantage over 2507 in this area. Outstanding performance in sour gas (H₂S) environments with NACE MR0175 compliance. Superior resistance to stress corrosion cracking. Tungsten addition enhances localized corrosion resistance.
Typical Applications
Related Standards
Available Products in This Material
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