Monel 400 Round Bar (UNS N04400)
Monel 400 Round Bar is a nickel–copper alloy renowned for its excellent corrosion resistance, high strength, and outstanding performance in marine and chemical environments. Containing approximately 63% nickel and 30–34% copper, Monel 400 maintains its mechanical properties over a wide temperature range, from sub-zero conditions to elevated temperatures, making it a reliable material for critical applications.
This alloy shows exceptional resistance to seawater, hydrofluoric acid, sulfuric acid, and alkaline solutions, and is virtually immune to chloride-induced stress corrosion cracking. Monel 400 is also known for its good weldability, excellent toughness, and long service life under severe operating conditions.
Key Features
- Excellent resistance to seawater and marine atmospheres
- High strength and toughness over a wide temperature range
- Outstanding resistance to acids and alkalis
- Immune to chloride stress corrosion cracking
- Good weldability and fabricability
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | N04400 |
| DIN | 2.4360 / 2.4361 |
| EN | NiCu30Fe |
| JIS | NW 4400 |
Sizes
| Diameter Range | Length |
|---|---|
| 6 mm – 300 mm | 3 m, 6 m, Cut to Length |
| 1/4” – 12” | As per requirement |
Monel 400 Chemical Composition
| Element | Percentage (%) |
|---|---|
| Nickel (Ni) | 63.0 min |
| Copper (Cu) | 28.0 – 34.0 |
| Iron (Fe) | ≤ 2.5 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 0.5 |
| Carbon (C) | ≤ 0.3 |
| Sulfur (S) | ≤ 0.024 |
UNS N04400 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 480 – 620 MPa |
| Yield Strength | ≥ 170 MPa |
| Elongation | ≥ 35% |
| Hardness | ~120 HRB |
Monel 400 Round Bar Physical Properties
| Property | Value |
|---|---|
| Density | 8.8 g/cm³ |
| Melting Range | 1300 – 1350°C |
| Thermal Conductivity | ~22 W/m·K |
| Electrical Resistivity | ~0.5 µΩ·m |
Applications
- Marine engineering and seawater systems
- Heat exchangers and condensers
- Chemical processing equipment
- Oil & gas components
- Pumps, valves, and shafts
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