Monel 400 alloy seamless annealed tube
Monel 400 tubing is a nickel-copper alloy known for its high strength, excellent corrosion resistance, and ductility, making it suitable for applications involving seawater, acids, and alkalis. Monel 400 seamless annealed tubing is hollow and features a smooth, dull surface. This is because the annealing process softens the material, increasing its ductility and making it easier to form. This shape is ideal for applications requiring high durability under mechanical stress and aggressive chemical conditions, such as oil and gas extraction, offshore engineering, and chemical processing.
What is the annealing temperature for Monel 400?
1300 to 1800°F
Heating should be performed in a sulfur-free, reducing atmosphere. Annealing temperatures range from 1300 to 1800°F, but 1600 to 1800°F is most typical. Lower annealing temperatures (e.g., 1300 to 1500°F) allow for longer annealing times to minimize grain coarsening.
Monel Alloy 400 Tube Material Specification Chart
| ASTM B163 Alloy 400 Tubing Standards | ASTM B163/ ASME SB163, ASTM B730/ ASME SB730 UNS 4400 Tubing |
|---|---|
| ASTM B163 Alloy 400 Seamless Tube Size | 3.35 mm OD To 101.6 mm OD |
| ASTM B163 Alloy 400 Welded Tube Size | 6.35 mm OD To 152 mm OD |
| ASTM B730 Monel 400 Tubing Swg & Bwg | 10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg. |
| Inconel WERKSTOFF NR. 2.4360 Tube wall thickness | 0.020" –0.220", (special wall thicknesses available) |
| Monel UNS N04400 Tubing Length | Single Random, Double Random, Standard & Cut length Tube |
| Inconel WERKSTOFF NR. 2.4360 Tubing Finish | Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF |
| Form | 'U' bent, Hollow, Hydraulic, LSAW, Boiler, Straight Tube, Tube Coil, Round, Rectangular, Square Etc |
| Types of 400 Alloy Tubing | Seamless, ERW, EFW, Welded, Fabricated Tube / Tubing |
| 400 Alloy Tube End | Plain End, Beveled End, Treaded Tube |
| Marking | All ASTM B163 Monel 400 Tubing are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. (Or according to the customer's request.) |
| Application & uses of Monel 400 Tube |
Oil Tube, Gas Tube, Fluid Tube, Boiler Tube, Heat exchanger Tube, |
Chemical Structure of UNS N04400 Seamless Tubing
| 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 | – |
Monel 400 Cold Drawn and Annealed Tube Physical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Density | 8.8 gm/cm3 | 0.318 lb/in3 |
Monel Alloy 400 Tube Mechanical Strength
| 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 % |
Key Characteristics of Monel 400 Alloy
Composition: A nickel-copper alloy often referred to as the "Puritan alloy" due to its similar composition to naturally occurring nickel ore.
Corrosion Resistance: Virtually immune to chloride-ion stress corrosion cracking and resistant to seawater, acids (such as hydrofluoric and sulfuric acids), and alkalis.
Strength: High strength and good ductility, which can be increased by cold working.
Temperature Range: Suitable for applications from subzero to 1,000°F (538°C).
Hardenability: The alloy can only be hardened by cold working, not heat treating.
Characteristics of Seamless Annealed Tube
Seamless Construction: The tube is formed without any welds, resulting in a uniform, stronger, and more reliable product.
Annealed Condition: The annealing process renders the tube soft and pliable, imparting a matte finish and improving its ductility and formability.
Mechanical Properties: Annealing produces low to moderate tensile strength, which can be increased by using the "as rolled" condition or cold working.
Common Applications
Oil and Gas: Used in oil and gasoline extraction due to its resistance to harsh environments.
Offshore: Ideal for use in marine and coastal environments where resistance to seawater corrosion is critical.
Chemical Processing: Handling corrosive media such as acids, alkalis, and steam in high-temperature applications.
Other Applications: Used in heat exchangers and valves.
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. We also offer customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneesteel.com.
