X2CrNiMoN22-5-3
1.4462The most widely used duplex stainless steel worldwide (SAF 2205 / UNS S31803/S32205). Austenitic-ferritic microstructure provides ~2× yield strength of 304/316 (≥450 MPa) with excellent resistance to stress corrosion cracking, pitting (PREN 33-38), and intergranular corrosion. Service temperature -50°C to 300°C. Used for oil & gas production tubing, chemical processing vessels, desalination plants, pulp & paper digesters, heat exchangers, and bridge structures. Weldable with ER2209 filler.
Chemical composition comparison (wt%)
Side-by-side: X2CrNiMoN22-5-3 (EN) (EN 10088-2) vs ASTM
| Element | X2CrNiMoN22-5-3 (EN) | ASTM | Overlap |
|---|---|---|---|
| C | ≤ 0.03% | — | — |
| Si | ≤ 1% | — | — |
| Mn | ≤ 2% | — | — |
| P | ≤ 0.035% | — | — |
| S | ≤ 0.015% | — | — |
| Cr | 21–23% | — | — |
| Mo | 2.5–3.5% | — | — |
| Ni | 4.5–6.5% | — | — |
| N | 0.1–0.22% | — | — |
Mechanical properties
Solution Annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 650–880 | MPa |
| Yield Strength | ≥ 450 | MPa |
| Elongation | ≥ 25 | % |
| Hardness HB | ≤ 270 | HB |
General
| Property | Value | Unit |
|---|---|---|
| Density | ≥ 7.8 | g/cm3 |
Related materials
304 Stainless Steel
1.4301The most widely used austenitic stainless steel. Excellent corrosion resistance, good formability and weldability. Standard choice for food processing, chemical, and architectural applications.
316L
1.4404Low-carbon austenitic stainless steel with molybdenum addition. Superior corrosion resistance to 304, especially against chlorides and pitting. Standard choice for chemical processing, marine, medical implants, and pharmaceutical equipment.
430 Stainless Steel
1.4016Ferritic chromium stainless steel with good corrosion resistance and formability. Lower cost than austenitic grades. Used for automotive trim, kitchen sinks, architectural panels, and appliance components.
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