Seawater Resistance
Used in selected marine and seawater-related systems where corrosion resistance is an important consideration.
MONEL® · Product Details
MONEL® Alloy 400
Nickel–Copper Alloy · Marine and Chemical Processing
MONEL® alloy 400 is a solid-solution nickel-copper alloy that can be hardened by cold working. It offers high strength and toughness over a wide temperature range and resistance to many corrosive environments, with established use in marine and chemical-processing equipment.
Ni–CuAlloy system
8.80 g/cm³Reference density
1300–1350 °CReference melting range
Key Performance Characteristics
UNS N04400 / W. Nr. 2.4360 and 2.4361
Strength & Toughness
Provides useful strength and toughness over a wide temperature range, including at subzero temperatures.
Cold-Work Hardening
Strength and hardness can be increased through cold working; the final condition should match the design requirements.
Broad Industrial Use
Applied in selected pumps, valves, shafts, process vessels and heat-exchanger equipment.
Typical Application Areas
Marine Equipment
Selected marine fixtures, fasteners, pump shafts and propeller shafts.
Pumps & Valves
Selected pumps, valves and mechanical components.
Chemical Processing
Selected process vessels, piping and equipment for compatible media.
Heat Exchangers
Selected feedwater heaters and other heat-transfer equipment.
Chemical Composition
Limiting chemical composition, %
| Element | Composition limit |
|---|---|
| Nickel + Cobalt | 63.0 min. |
| Copper | 28.0–34.0 |
| Iron | 2.5 max. |
| Manganese | 2.0 max. |
| Carbon | 0.3 max. |
| Sulfur | 0.024 max. |
| Silicon | 0.5 max. |
Physical Properties
Published reference values
| Property | Reference value |
|---|---|
| Density | 8.80 g/cm³ |
| Melting range | 1300–1350 °C |
| Elastic modulus in tension, room temperature | Approx. 179 GPa |
Mechanical Properties
Reference data by form and condition
| Product form / condition | Tensile strength | 0.2% yield strength | Elongation |
|---|---|---|---|
| Rod / bar, annealed | 517–620 MPa | 172–345 MPa | 25–50% |
| Plate, hot-rolled / as-rolled | 517–655 MPa | 276–517 MPa | 30–45% |
| Sheet, annealed | 482–586 MPa | 207–310 MPa | 35–45% |
Published room-temperature reference ranges for the product forms and conditions shown. Cold-drawn, stress-relieved and other conditions can have substantially different values.
Discuss Your MONEL® Alloy 400 Requirements
Tell us the required product form, dimensions, quantity, applicable standard and delivery condition. Our team welcomes inquiries from international industrial buyers.
Technical reference: Special Metals — MONEL® alloy 400 technical bulletin