Nickel-based alloys
2.4856
Alloy 625
NiCr22Mo9Nb
Niobium-stabilised nickel-chromium-molybdenum alloy with outstanding resistance to a broad range of corrosive media combined with high-temperature strength.
Chemical composition
mass %| Element | Content |
|---|---|
| CCarbon | 0.03–0.1 |
| SiSilicon | ≤0.5 |
| MnManganese | ≤0.5 |
| PPhosphorus | ≤0.02 |
| SSulphur | ≤0.015 |
| TiTitanium | ≤0.4 |
| CrChromium | 20–23 |
| MoMolybdenum | 8–10 |
| NiNickel | balance |
| CuCopper | ≤0.5 |
| NbNiobium | 3.15–4.15 |
| AlAluminium | ≤0.4 |
| FeIron | ≤5 |
Mechanical properties
room temperature- Scaling temperature (°C)
- 1100
Standard equivalences
- DIN/EN
- NiCr22Mo9Nb
- AISI
- Alloy 625
- UNS
- N06625
- AFNOR
- NC 22 D Nb
- BS
- NA 21
Typical applications
- Offshore technology and seawater systems
- Chemical industry (e.g. superphosphoric acid)
- Flue-gas desulphurisation
- Waste-incineration plant
Frequently asked questions
What is 2.4856 (Alloy 625)?
2.4856 (NiCr22Mo9Nb) — Nickel-based alloys. Niobium-stabilised nickel-chromium-molybdenum alloy with outstanding resistance to a broad range of corrosive media combined with high-temperature strength.
Which grades are equivalent to 2.4856?
2.4856 corresponds to EN NiCr22Mo9Nb; equivalent designations: AISI Alloy 625, UNS N06625, AFNOR NC 22 D Nb, BS NA 21.
Related grades
Indicative values — verify against the applicable standard before specifying.
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