Monel 400 has excellent resistance to corrosion by many reducing media such as sulfuric and hydrochloric acids. It is generally more resistant to corrosion by oxidizing media than higher copper alloys. Monel 400 resists pitting and stress corrosion cracking in most fresh and industrial waters. It has good resistance in flowing seawater, but under stagnant conditions, pitting and crevice corrosion is induced. Monel 400 is probably the most resistant to hydrofluoric acid in all concentrations up to the boiling point, of all engineering alloys. Monel 400 is notable for its toughness, it does not show embrittlement tendency at cryogenic temperatures. It is work hardenable.
Chinese designation: 蒙乃尔 400 (Monel 400)
| Element | Min % | Max % |
|---|---|---|
| Ni | 63 | — |
| Cu | 28 | 34 |
| Fe | — | 2.5 |
| Mn | — | 2 |
| Si | — | 0.5 |
| C | — | 0.3 |
| S | — | 0.024 |
Chemical composition per the grade specification. Values are nominal; the certified analysis is issued with every order on EN 10204 3.1 documentation.
| Product form | ASTM / EN specification |
|---|---|
| Rod, bar and wire | B 164 |
| Plate, sheet and strip | B 127, B 906 |
| Seamless pipe and tube | B 165, B 829 |
| Welded pipe | B 725, B 775 |
| Welded tube | B 730, B 751 |
| Welding fitting | B 366 |
| Forging | B 564 |
Monel 400 (UNS N04400, DIN W. Nr. 2.4360, 2.4361) is a nickel-based alloys grade. Monel 400 has excellent resistance to corrosion by many reducing media such as sulfuric and hydrochloric acids. It is generally more resistant to corrosion by oxidizing media than higher copper alloys. Monel 400 resists pitting and stress corrosion cracking in most fresh and industrial waters. It has good resistance in flowing seawater, but under stagnant conditions, pitting and crevice corrosion is induced. Monel 40
ROBAN supplies Monel 400 as rod, bar and wire, plate, sheet and strip, seamless pipe and tube, welded pipe, welded tube, with custom dimensions to your drawing.
Yes. Every order ships with EN 10204 3.1 material certification covering the actual heat analysis. 3.2 documentation is available where the contract requires it.
Stock items ship within 3 to 7 working days. Cut-to-size and forged items typically run 15 to 30 working days depending on quantity and specification. Send us your drawing or enquiry for a firm lead time.
Drawing, grade, dimensions, quantity and delivery date — we price from those.
Request a Quote →Heat analysis certificate issued with every order at no extra charge.
Quality documentation →Shearing, sawing and machining to the tolerances on your drawing.
Capabilities →Buyers often substitute within a family once service conditions, corrosion behaviour or fabrication method narrow the choice.
