1.4410 (Super-Duplex)
1.4410 is a super-duplex steel with the highest strength and resistance to pitting and crevice corrosion – for the most aggressive chloride and seawater applications.
Application & properties
1.4410 is a super-duplex steel with the highest strength and resistance to pitting and crevice corrosion – for the most aggressive chloride and seawater applications.
- Offshore and seawater technology
- Seawater desalination
- Aggressive chemicals with high chloride load
Chemical composition
Typical values in wt.-% per EN standard (heat analysis).
| Element | Content (%) |
|---|---|
| C | ≤ 0.030 |
| Cr | 24.0–26.0 |
| Ni | 6.0–8.0 |
| Mo | 3.0–4.5 |
| N | 0.24–0.35 |
Mechanical properties
Typical values at room temperature per EN standard.
| Property | Value |
|---|---|
| Yield strength Rp0.2 | ≥ 530 MPa |
| Tensile strength Rm | 730–930 MPa |
| Elongation A | ≥ 20 % |
Standards, equivalents & product forms
| Topic | Detail |
|---|---|
| Standards | EN 10216-5, EN 10088 |
| ASME/ASTM equivalent | ~ UNS S32750 |
| Material no. | 1.4410 |
| Short name / aka | X2CrNiMoN25-7-4 · 2507 · UNS S32750 |
We supply 1.4410 (Super-Duplex) as pipes, flanges and fittings – seamless or welded, on request with an EN 10204 3.1 / 3.2 mill certificate.
Frequently asked questions about 1.4410 (Super-Duplex)
What distinguishes super-duplex (1.4410) from duplex (1.4462)?
Super-duplex has higher chromium, molybdenum and nitrogen contents and therefore even higher strength and chloride resistance (higher PREN).
Where is 1.4410 used?
In the most demanding seawater, offshore and chemical applications.
Request 1.4410 (Super-Duplex)?
Grade, standard, size, pressure rating and quantity are enough – on request with an EN 10204 3.1 / 3.2 mill certificate. Your quote usually the same day.
All data are typical values per the relevant EN standards for first orientation – without warranty. The applicable standard and the mill certificate of the delivery are decisive.