Monel 400 - 2.4360
Wst. 2.4360
UNS N04400
Trademarks: Monel 400
Stock program: 3 – 25 mm OD / 1/16” – 1.1/2” OD
Specification: ASTM B 163/ASME SB 163 / ASTM B 165/ASME SB 165 / EN 10216-5/EN ISO 1127 / NACE MR0175/PED 97/23 EC
Maximum expose temperature: 425°C / 772°F
Alloy 400 is a nickel-copper alloy (approx. 67% Ni – 23% Cu) that is resistant to seawater and steam at high temperatures as well as to salt and caustic solutions. It is a solid-solution alloy that can be hardened only by cold working. It’s widely used in marine applications and other non-oxidizing chloride solutions. This nickel alloy is particularly resistant to hydrochloric and hydrofluoric acids when they are de-aerated. As would be expected from its high copper content, alloy 400 is rapidly attacked by nitric acid and ammonia systems.
Characteristics
- Resistance to seawater and steam at high temperatures
- Excellent resistance to many corrosive environments
- High strength and toughness over a wide temperature range
- Particularly resistant to stress corrosion cracking
- High resistance to alkalis and alkaline salt
Market applications:
- Marine engineering
- Chemical and hydrocarbon processing equipment
- Steam generators
- Heat exchanges
- Control lines
Technical details
| Technical composition (%) | Fe | Ni | Mn | Cu | Si | C | S | |
|---|---|---|---|---|---|---|---|---|
| 400 | min | - | 63 | - | 28 | - | - | - |
| max | 2.5 | 70 | 2.0 | 40 | 0.5 | 0.3 | 0.024 |
| Mechanical properties | 400 |
|---|---|
| Tensile strenght (mpa, min) | 480 |
| Yield strength (0.2% offset mpa, min) | 195 |
| Elongation (%, min) | 40 |
| Density / weight (g / cm3 / kg) | 8.83 |