Monel 400 pipe (UNS N04400) is a high-strength nickel-copper alloy pipe known for its excellent corrosion resistance, particularly to seawater and various acids, making it an ideal choice for marine, chemical, and hydrocarbon applications, including seamless bright finish pipe. It exhibits good mechanical properties over a wide temperature range, including cryogenic conditions, and can be hardened by cold working. The alloy is a pure alloy, meaning its nickel and copper contents are similar to those found in naturally occurring nickel ore.
What are the standards for Monel 400 pipe?
Monel 400 standards include AMS 4574, AMS 4675, AMS 4731, ASTM B163, ASTM B165, ASTM F96, and UNS N04400. Due to work hardening during machining, machinability of Monel 400 can be challenging. However, conventional machining methods work well for the ferrous alloys used in this alloy.
UNS N04400 Nickel Alloy Seamless Bright Finish Tube Specification
| Specifications | ASTM B163, B730 / ASME SB163, SB730 |
| Dimensions | ASTM, ASME and API |
| Size | 6.35 OD (mm) To 152 OD (mm) |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Type | Seamless / ERW / Welded / Fabricated / LSAW Tubes |
| Form | Round Tubes, Custom Tubes, Square Tubes, Rectangular Tubes, "U" Shape, Hydraulic Tubes |
| Length | Single Random, Double Random & Cut Length. |
| End | Plain End, Beveled End, Treaded |
Equivalent Grades for Monel 400 Seamless Tubes:
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| Monel 400 | 2.4360 | N04400 | NW 4400 | NA 13 | МНЖМц 28-2,5-1,5 | NU-30M | NiCu30Fe |
UNS N04400 Nickel Alloy Seamless Bright Finish Tube Chemical Composition
| Grade | C | Mn | Si | S | Cu | Fe | Ni | Cr |
| Monel 400 | 0.30 max | 2.00 max | 0.50 max | 0.24max | 28.0-34.0 | 2.50 max | 63.00 min | – |
UNS N04400 Nickel Alloy Seamless Bright Finish Tube Mechanical Properties
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Monel 400 | 8.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80,000 , MPa – 550 | Psi – 35,000 , MPa – 240 | 40 % |
UNS N04400 Nickel Alloy Seamless Bright Finish Tube Physical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Density | 8.8 gm/cm3 | 0.318 lb/in3 |
UNS N04400 Nickel Alloy Seamless Bright Finish Tube Pressure Rating
|
Tube O.D. |
Wall Thickness of Tube (inches) | |||||||
|---|---|---|---|---|---|---|---|---|
| .028 | .035 | .049 | .065 | .083 | .095 | .109 | .120 | |
| 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 | |||
Seamless Bright Finish Tube Characteristics
Seamless: "Seamless" refers to the tube being made from hot-rolled steel billets and precisely formed, resulting in higher strength and load-bearing capacity than welded tubes.
Bright Finish: "Bright Finish" (BA) refers to a clean, bright, smooth surface achieved through annealing and pickling.
Common Applications
Marine: Due to its resistance to seawater corrosion, it is widely used in marine equipment, propeller shafts, and marine equipment.
Chemical Processing: Suitable for equipment such as pumps, valves, piping systems, heat exchangers, and storage tanks.
Petroleum/Hydrocarbons: Used in crude oil stills, process vessels, and other hydrocarbon processing components.
Other: Also used in electronic components, springs, and fire protection systems.
Gnee Steel specializes in the production and sale of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. Gnee Steel's products are widely used in aerospace, chemical, electric power, automotive, and nuclear energy applications, and we can provide customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneemetal.com.
