Duplex 2205
Description
Duplex 2205 (UNS S32205) is a high-strength stainless steel that blends the best of ferritic and austenitic grades. With twice the yield strength of standard austenitic steels and excellent corrosion resistance, Duplex 2205 stands up to stress corrosion cracking, pitting, and erosion—even in marine and chemical environments. Its balanced microstructure and solid weldability make it a reliable choice for chemical processing equipment, pressure vessels, and offshore structures.
Application：
- Chemical processing
- Offshore oil and gas
- Marine applications
- Pulp and paper mills
- Desalination plants
- Food processing
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Product Specification
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 700 – 800 MPa (101 – 116 ksi) |
| Yield Strength (0.2% Proof) | ≥ 550 MPa (80 ksi) |
| Elongation | ≥ 25% |
| Hardness (Brinell) | 293 HB |
| Hardness (Rockwell C) | 31.0 RC |
| Elastic Modulus | 200 GPa (29 × 10^6 psi) |
Chemistry Composition
| Element | Percentage |
|---|---|
| Chromium (Cr) | 21.0 – 23.0% |
| Nickel (Ni) | 4.5 – 6.5% |
| Molybdenum (Mo) | 2.5 – 3.5% |
| Nitrogen (N) | 0.08 – 0.20% |
| Carbon (C) | ≤ 0.03% |
| Manganese (Mn) | ≤ 2.00% |
| Silicon (Si) | ≤ 1.00% |
| Phosphorus (P) | ≤ 0.03% |
| Sulfur (S) | ≤ 0.03% |
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