ASTM B163 Monel Nickel Alloy Steel Tube 400 Seamless 3 Inch Water Corrosion
Monel 400 Seamless Tube Super alloys overview
Monel 400 (UNS N04400) seamless tubes manufactured to ASTM B163 are mainly used for condenser or heat-exchanger service. These tubes are generally furnished in small size with light wall: from 3″ (76.2 mm) and under in outside diameter with minimum wall thickness of 0.148″ (3.76 mm) and under, and with an average wall thickness of 0.165″(4.19 mm) and under.
The Monel 400 tubes of ASTM B163 can be manufactured by either hot-rolling or cold-rolling process. It shall be furnished in either annealed or stress-relieved condition with relative surface finishes. The hydrostatic test pressure for Monel 400 tubes shall be 17.5 ksi [120.6 MPa].
Chemical Composition & Mechanical Properties of Monel 400 Seamless Tube
| Condition | Tensile Strength, min. ksi [MPa] |
Yield Strength, min. ksi [MPa] |
Elongation, min. % |
Hardness, HRB |
|---|---|---|---|---|
| Annealed | 70 [483] | 28 [193] | 35 | - |
| Stress-Relieved | 85 [586] | 55 [379] | 15 | ≤75 |
The characteristics of Monel 400
- Resistant to seawater and steam at high temperatures
- Excellent resistance to rapidly flowing brackish water or seawater
- Excellent resistance to stress corrosion cracking in most freshwaters
- Particularly resistant to hydrochloric and hydrofluoric acids when they are de-aerated
- Offers some resistance to hydrochloric and sulfuric acids at modest temperatures and concentrations, but is seldom the material of choice for these acids
- Excellent resistance to neutral and alkaline salt
- Resistance to chloride induced stress corrosion cracking
- Good mechanical properties from sub-zero temperatures up to 1020° F
- High resistance to alkalis
Other designations of Monel 400
- AMS 4574.
- AMS 4675.
- AMS 4731.
- ASTM B163.
- ASTM B165.
- ASTM F96.
- UNS N04400.
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