Austenitic stainless
1.4563 Alloy 28 X1NiCrMoCu31-27-4
High-nickel/chromium/copper super-austenitic resistant to sulphuric acid and insensitive to stress-corrosion cracking; low carbon secures weld resistance.
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Chemical composition
mass %| Element | Content |
|---|---|
| CCarbon | ≤0.02 |
| SiSilicon | ≤0.7 |
| MnManganese | ≤2 |
| PPhosphorus | ≤0.03 |
| SSulphur | ≤0.01 |
| NNitrogen | ≤0.11 |
| CrChromium | 26–28 |
| CuCopper | 0.7–1.5 |
| MoMolybdenum | 3–4 |
| NiNickel | 30–32 |
Mechanical properties
room temperature- Rp0.2 min (N/mm²)
- 215
- Rp1.0 min (N/mm²)
- 245
- Rm (N/mm²)
- 500–750
- Elongation A% (longitudinal)
- 40
- Elongation A% (transverse)
- 35
- Impact energy KV J (longitudinal)
- 120
- Impact energy KV J (transverse)
- 90
Seamless tube; transverse above 508 mm OD.
Standard equivalences
- DIN/EN
- X1NiCrMoCu31-27-4
- AISI
- Alloy 28
- UNS
- N08028
- SS
- 2584
- AFNOR
- Z2 NCDU 31.27
Typical applications
- Condensers and piping for sour gases
- Critical chemical-industry duty
- Sulphuric-acid production and processing
- Seawater desalination and seawater-cooled heat exchangers
Frequently asked questions
What is 1.4563 (Alloy 28)?
1.4563 (X1NiCrMoCu31-27-4) — Austenitic stainless. High-nickel/chromium/copper super-austenitic resistant to sulphuric acid and insensitive to stress-corrosion cracking; low carbon secures weld resistance.
Which grades are equivalent to 1.4563?
1.4563 corresponds to EN X1NiCrMoCu31-27-4; equivalent designations: AISI Alloy 28, UNS N08028, SS 2584, AFNOR Z2 NCDU 31.27.
Related grades
Indicative values — verify against the applicable standard before specifying.
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