1.4410 || Super-Duplex || S32750 || F53
Corrosion-resistant, austenitic ferritic super-duplex steel
The material S32750 is a corrosion-resistant, austenitic ferritic type of super-duplex steel. It is particularly suitable for applications requiring a high resistance and strength – in particular when conventional corrosion-resistant duplex steels no longer meet the corrosion demands.
Special stainless steel
The steel is characterised by the following properties:
- Excellent resistance to pitting and crevice corrosion, PREN = ≥38
- Higher strength than conventional austenitic stainless steels
- Good weldability
- High resistance to general corrosion
- High resistance to acidic solutions
- High resistance to stress corrosion
SUPER-DUPLEX applications
- Chemical industry
- Petrochemical industry
- Pulp / Paper industry
- Sea and seawater plants
- Flue gas systems
- Shipbuilding / Offshore
Chemical values – Reference analysis (weight proportion in %)
| Value | Proportion % |
|---|---|
| C | ≤ 0,03 |
| P | < 0,035 |
| S | ≤ 0,015 |
| Si | ≤ 1,0 |
| Mn | 1,0 |
| Cr | 24 – 26 |
| Mo | 3,5 – 5,0 |
| Ni | 6 – 8 |
| N | 0,24 – 0,32 |
Mechanical values at room temperature
| Tensile strength N/mm² | 800 – 1000 |
| Tension elastic limit Rp 0,2 N/mm² | 550 |
| Breaking elongat ≤ 3 ≤ 75 mm Dicke A5 % | 20 |
Assignment to current and older standards
- Designation according to DIN: X 2 CrNiMoN 25-7-4
- ASTM Grade: S 32750
- EN: 1.4410
- ASME: Superduplex
- AFNOR: X2CrNiMoN 22-5-3
- SIS: 2377
- UNS: S 32750
- Vd TÜV 508
Tables and rates
Scope of delivery
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