Monel 400 (UNS N04400) is a nickel-copper alloy with exceptional resistance to hydrofluoric acid at all concentrations and temperatures — one of only a handful of materials that can handle HF. Also hi...
Monel 400 (UNS N04400) is a nickel-copper alloy with exceptional resistance to hydrofluoric acid at all concentrations and temperatures — one of only a handful of materials that can handle HF. Also highly resistant to seawater, alkalis, and reducing acids. The standard material for HF alkylation units in refineries, marine hardware, and chemical processing involving hydrofluoric acid.
| Property | Value |
|---|---|
| Grade | Monel 400 |
| ASTM / ASME | ASTM B366 WPHM-400 |
| UNS Number | N04400 |
| Chromium (Cr) | — |
| Nickel (Ni) | 63–70% |
| Molybdenum (Mo) | — |
| Temp Rating | 480°C |
| Fitting Standard | ASME B16.9 / MSS SP-43 |
| Size Range | ½" NB to 48" NB |
| Certificate | EN 10204 3.1 MTC |
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