Duplex (austenitic-ferritic)
1.4501
Super Duplex (F55)
X2CrNiMoCuWN25-7-4
Tungsten-bearing super-duplex with high strength and excellent resistance to pitting and chloride stress-corrosion cracking.
Chemical composition
mass %| Element | Content |
|---|---|
| CCarbon | ≤0.03 |
| SiSilicon | ≤1 |
| MnManganese | ≤1 |
| CrChromium | 24–26 |
| MoMolybdenum | 3–4 |
| NiNickel | 6–8 |
| NNitrogen | 0.2–0.3 |
| CuCopper | 0.5–1 |
| WTungsten | 0.5–1 |
Mechanical properties
room temperature- Rp0.2 min (N/mm²)
- 515
- Rm (N/mm²)
- 730–930
Seamless tube.
Standard equivalences
- DIN/EN
- X2CrNiMoCuWN25-7-4
- AISI
- Super Duplex F55
- UNS
- S32760
Typical applications
- Chemical and petrochemical processing
- Seawater desalination
- Shipbuilding
- Offshore and sour-gas service
Frequently asked questions
What is 1.4501 (Super Duplex (F55))?
1.4501 (X2CrNiMoCuWN25-7-4) — Duplex (austenitic-ferritic). Tungsten-bearing super-duplex with high strength and excellent resistance to pitting and chloride stress-corrosion cracking.
Which grades are equivalent to 1.4501?
1.4501 corresponds to EN X2CrNiMoCuWN25-7-4; equivalent designations: AISI Super Duplex F55, UNS S32760.
Related grades
Indicative values — verify against the applicable standard before specifying.
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