Monel 400 is a nickel-copper alloy resistant to seawater and steam at high temperatures and widely used in the chemical, oil and marine industries. As a solution strengthened material, it displays good strength, toughness and corrosion resistance at temperatures up to 400°C.
Its corrosion resistance is particular strong in rapid flowing brackish water or seawater. Alloy 400 also exhibits good resistance to hydrofluoric and dilute non-oxidising acids, alkalis and salts. It also resists corrosion by dry chlorine and hydrogen chloride and is not susceptible to stress corrosion cracking. This grade is readily cold formable and weldable.
SPECIFICATION OF MONEL 400:
• UNS N04400
• ASTM /ASME B 366
CHARACTERISTICS OF MONEL 400:
• Excellent corrosion resistance in marine environments
• Good resistance to non oxidising acids, alkalis and salts
• Not susceptible to chloride stress corrosion cracking
CHEMICAL COMPOSITION OF MONEL 400:
| C | Mn | S | Si | Ni | Cu | Fe |
|---|---|---|---|---|---|---|
| .30 max | 2.00 max | .024 max | .50 max | 63.0 min | 28.0-34.0 | 2.50 max |
MECHANICAL PROPERTIES OF MONEL 400:
| Tensile Strength (N/mm2) | Proof Strees (N/mm²) | Elongation(%) | Hardness (HB) |
| 480-600 | 170-415 | 20-35 | 35 HRC max |