
Monel 400 Tube
1. Standard: ASTM B165、ASTM B163、ASTM B474、ASTM B725
2. Diameters: 6.35 - 254 mm
3. Wall thickness: 0.6 to 20mm
4. Length: Single Random Length, Double Random Length and Customized
Monel 400 Tube, also known as UNS N04400, is a nickel-copper solid solution alloy that is highly corrosion resistant. Monel 400 is composed of 65-70% nickel, 20-29% copper, and small amounts of iron, manganese, and silicon. Tubes made from Nickel Copper Alloy 400 are known for their excellent corrosion resistance and are often exposed to marine applications where they are exposed to salt water and other corrosive elements. ASTM B165 UNS N04400 Tube also has excellent resistance to alkaline and acidic media, which makes it suitable for use in the chemical processing industry as well.
Monel Alloy 400 Tube Standard:
- ASTM B165: Standard Specification for Nickel-Copper Alloy (UNS N04400) Seamless Pipe and Tube
- ASTM B163: Standard Specification for Seamless Nickel and Nickel Alloy Condenser and Heat-Exchanger Tubes
- ASTM B725: Standard Specification for Welded Nickel and Nickel Copper Alloy Pipe

Nickel Copper Alloy 400 Specifications
| Specifications |
ASTM B165 / ASME SB165 ASTM B163 / ASME SB163 ASTM B474 / ASME SB474 ASTM B725 / ASME SB725 |
| Dimensions | ASTM, ASME, and API |
| Size | 15″NB TO 150″NB IN |
| Specialized in | Large Diameter Size |
| Range | 6.35 mm OD up to 254 mm OD in 0.6 TO 20 mm thickness. |
| Type | Seamless / ERW / Welded / Fabricated |
| Form | Round, Hydraulic Etc |
| Length | Single Random, Double Random & Cut Length. |
| End | Plain End, Beveled End, Treaded |
Alloy UNS N04400 Seamless Tubes Pressure Class
| Pipe O.D. | Wall Thickness of Pipe/Tube (inches) | |||||||
| (in.) | 0.028 | 0.035 | 0.049 | 0.065 | 0.083 | 0.095 | 0.109 | 0.12 |
| Working Pressure (psig) | ||||||||
| 1/8 | 7900 | 10100 | ||||||
| 1/4 | 3700 | 4800 | 7000 | 9500 | ||||
| 5/16 | 3700 | 5400 | 7300 | |||||
| 3/8 | 3100 | 4400 | 6100 | |||||
| 1/2 | 2300 | 3200 | 4400 | |||||
| 3/4 | 2200 | 3000 | 4000 | 4600 | ||||
| 1 | 2200 | 2900 | 3400 | 3900 | 4300 | |||
Monel 400 UNS N04400 Tube Thermal Stability:
At elevated temperatures, the mechanical properties of 2.4360 Monel 400 are maintained up to approximately 600°C (1112°F), and Alloy 400 retains good strength and toughness in cryogenic environments, allowing it to be used in cryogenic applications.
Thermal Conductivity:
Monel Alloy 400 has good thermal conductivity and a low coefficient of thermal expansion.
Easy to Fabricate:
Monel 400 specialty metal can be easily fabricated into a variety of forms, including tubes, pipes, plates, fittings and flanges.
2.4360 Monel 400 Pipe Tube Application
- Oil and Gas
- Chemical Processing
- Marine and Aerospace
- Drilling
- Mining Operations
FAQ
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