ASTM B165 MONEL400 / UNS NO4400 / DIN 2.4360 NICKEL ALLOY SMLS PIPE
ASTM B165 MONEL400 / UNS NO4400 / DIN 2.4360 NICKEL ALLOY SMLS PIPE
Monel 400 is a nickel-copper alloy (about 67% Ni – 23% Cu) that is resistant to sea water and steam at high temperatures as well as to salt and caustic solutions. Alloy 400 is a solid solution alloy that can only be hardened by cold working. This nickel alloy exhibits characteristics like good corrosion resistance, good weldability and high strength. A low corrosion rate in rapidly flowing brackish or seawater combined with excellent resistance to stress-corrosion cracking in most freshwaters, and its resistance to a variety of corrosive conditions led to its wide use in marine applications and other non-oxidizing chloride solutions.
Monel 400 has great mechanical properties at subzero temperatures, can be used in temperatures up to 1000° F, and its melting point is 2370-2460° F. However, alloy 400 is low in strength in the annealed condition so, a variety of tempers may be used to increase the strength.
Monel 400 characteristics:
- 1. Resistant to seawater and steam at high temperatures.
- 2. Excellent resistance to rapidly flowing brackish water or seawater.
- 3. Excellent resistance to stress corrosion cracking in most freshwaters.
- 4. Particularly resistant to hydrochloric and hydrofluoric acids when they are de-aerated.
- 5. Offers some resistance to hydrochloric and sulfuric acids at modest temperatures and concentrations, but is seldom the material of choice for these acids.
- 6. Excellent resistance to neutral and alkaline salt.
- 7. Resistance to chloride induced stress corrosion cracking.
- 8. Good mechanical properties from sub-zero temperatures up to 1020° F.
- 9. High resistance to alkalis.
| Chemical Composition, % | |||||||
| C | Mn | S | Si | Ni | Cu | Fe | |
| 0.30 max | 2.00 max | 0.024 max | 0.50 max | 63.0 min | 28.0-34.0 | 2.50 max | |
| Mechanical Properties | |||||||
| Product Form | Condition | Tensile (ksi) | 0.2% Yield (ksi) | Elongation (%) | Hardness (HRB) | ||
| Rod & Bar | Annealed | 75-90 | 25-50 | 60-35 | 60-80 | ||
| Rod & Bar | Cold-Drawn Stress Relieved | 84-120 | 55-100 | 40-22 | 85-20 HRC | ||
| Plate | Annealed | 70-85 | 28-50 | 50-35 | 60-76 | ||
| Sheet | Annealed | 70-85 | 30-45 | 45-35 | 65-80 | ||
| Tube & Pipe Seamless | Annealed | 70-85 | 25-45 | 50-35 | 75 max* | ||
| ASTM Specifications | ||||||||
| Pipe Smls | Pipe Welded | Tube Smls | Tube Welded | Sheet / Plate | Bar | Forging | Fitting | Wire |
| B165 | B725 | B163 | B127 | B164 | B564 | B366 | ||
Monel 400 Application:
- 1. Marine engineering.
- 2. Chemical and hydrocarbon processing equipment.
- 3. Gasoline and freshwater tanks.
- 4. Crude petroleum stills.
- 5. De-aerating heaters.
- 6. Boiler feed water heaters and other heat exchangers.
- 7. Valves, pumps, shafts, fittings, and fasteners.
- 8. Industrial heat exchangers.
- 9. Chlorinated solvents.
- 10. Crude oil distillation towers.
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