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Duplex 1.4462
1.4462 / DIN: X2CrNiMoN22-5-3 / UNS: S31803
About Duplex 1.4462
Compared to standard stainless steel grades, Duplex is twice as strong and more resistant to localized corrosion. Corrosion resistance is excellent in environments with phosphoric acid, organic acids, and chloride.
Chemical Composition
| Element | Min % | Max % |
|---|---|---|
| C | 0 | 0.03 |
| Si | 0 | 1 |
| Mn | 0 | 2 |
| P | 0 | 0.035 |
| S | 0 | 0.015 |
| Cr | 21 | 23 |
| Mo | 2.5 | 3.5 |
| Ni | 4.5 | 6.5 |
| N | 0.1 | 0.2 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 650 |
| 0.2% Yield Strength (MPa) | 450 |
| Elongation at Break Min (%) | 25 |
| Hardness (Brinell) | 270 |
| Density (g/cm³) | 7,805 |
Related Comparisons
Key Features
- 2x stronger than standard stainless steel
- Excellent resistance to localized corrosion (phosphoric, organic acids, chloride)
- Retains properties up to 250°C
- High wear resistance
Industrial Applications
Oil refineriesBio-industryGas industryChemical industryPetrochemical industryPaper industryMaritime applicationsFood industryWater purification and desalination plants
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