Monel 400 K400 Fin tubes , Monel 400 K400 Fin Tube Manufacturer, Monel 400 K400 Fin Tube Supplier, Monel 400 K400 Fin Tube Exporter, Monel 400 K400 Precision Tubing, Monel 400 K400 Small Diameter Tube , Monel 400 K400 Fin Tubes
Monel 400, also known as Alloy 400 or UNS N04400, is a solid solution nickel-copper alloy with excellent resistance to corrosive environments. When used in the form of finned tubes—commonly referred to as Monel 400 or K400 fin tubes—it significantly enhances heat transfer capabilities in various industrial applications. The "K400" designation is often used interchangeably with Monel 400, especially in industrial supply chains.
Monel 400 is primarily composed of approximately 67% nickel and 30% copper, along with small amounts of iron, manganese, carbon, and silicon. This unique composition gives it excellent resistance to seawater, acidic environments, and other aggressive chemicals. It maintains strength and toughness over a wide temperature range, making it suitable for both high and low-temperature operations. When fabricated into finned tubes, this alloy enhances thermal performance while retaining corrosion resistance.
Finned tubes made from Monel 400/K400 are designed to increase the surface area available for heat transfer, which boosts efficiency in heat exchangers, condensers, and coolers. These fins can be integrally formed or attached using various methods like extrusion or welding. The manufacturing process ensures strong adhesion between the fin and the tube, enabling efficient thermal conductivity while withstanding mechanical and thermal stresses.
Due to their durability and resistance to corrosive substances, Monel 400/K400 fin tubes are widely used in chemical processing plants, marine environments, offshore oil and gas platforms, and nuclear power plants. They are especially suitable for applications involving exposure to saltwater, sulfuric acid, hydrofluoric acid, and alkalis—where standard stainless steel or copper alloys may fail over time.
Specification of Monel 400 K400 Fin tubes
| Property | Specification |
|---|---|
| Material Grade | Monel 400 / K400 (UNS N04400) |
| Standard Specifications | ASTM B163, B165 / ASME SB-163, SB-165 |
| Chemical Composition | Ni: ≥63% |
| Tube Outer Diameter (OD) | 6 mm to 38 mm (custom sizes available) |
| Wall Thickness | 0.7 mm to 2.5 mm (as per design/application) |
| Fin Type | Integral (extruded), welded, or L/G-type wound fins |
| Fin Material | Monel 400 (same as base tube) or alternate alloys |
| Fin Height | Up to 15 mm (depending on tube diameter & method) |
| Fin Thickness | Typically 0.3 mm to 0.5 mm |
| Fin Density | 10–12 fins per inch (FPI), customizable |
| Length of Tubes | Up to 15 meters (longer upon request) |
| Max Operating Temperature | Up to 550°C (1020°F) |
| Tensile Strength | ≥ 480 MPa (min) |
| Yield Strength (0.2%) | ≥ 170 MPa (min) |
| Elongation | ≥ 35% |
| Hardness | Rb 75 max |
| Corrosion Resistance | Excellent in seawater, acids (hydrofluoric, sulfuric) |
| Applications | Heat exchangers, condensers, offshore, marine, chemical |
| Delivery Condition | Annealed / Solution annealed and tested |
The key advantages of Monel 400/K400 fin tubes include exceptional corrosion resistance, high mechanical strength, and improved heat transfer efficiency. These attributes result in longer service life and lower maintenance costs in harsh operating environments. While Monel fin tubes may carry a higher initial cost than other materials, their performance and reliability often justify the investment, especially in critical or corrosive applications.
Chemical Composition of Monel 400 K400 Fin tubes
| Element | Symbol | Composition (%) |
|---|---|---|
| Nickel | Ni | ≥ 63.0 |
| Copper | Cu | 28.0 – 34.0 |
| Iron | Fe | ≤ 2.5 |
| Manganese | Mn | ≤ 2.0 |
| Silicon | Si | ≤ 0.5 |
| Carbon | C | ≤ 0.3 |
| Sulfur | S | ≤ 0.024 |
In summary, Monel 400 / K400 Fin tubes combine the critical qualities of high strength, corrosion resistance, and reliability in a single material. Their robust performance in harsh environments, along with adherence to international quality standards, makes them a trusted choice for Fin and control applications worldwide. Whether used in upstream oil operations or chemical manufacturing plants, these tubes ensure long-term service with minimal maintenance and high operational efficiency.
Specification of Monel 400 K400 Fin tubes
| Property | Specification |
|---|---|
| Material Grade | Monel 400 / K400 (UNS N04400) |
| Standard Specifications | ASTM B163, B165 / ASME SB-163, SB-165 |
| Chemical Composition | Ni: ≥63% |
| Tube Outer Diameter (OD) | 6 mm to 38 mm (custom sizes available) |
| Wall Thickness | 0.7 mm to 2.5 mm (as per design/application) |
| Fin Type | Integral (extruded), welded, or L/G-type wound fins |
| Fin Material | Monel 400 (same as base tube) or alternate alloys |
| Fin Height | Up to 15 mm (depending on tube diameter & method) |
| Fin Thickness | Typically 0.3 mm to 0.5 mm |
| Fin Density | 10–12 fins per inch (FPI), customizable |
| Length of Tubes | Up to 15 meters (longer upon request) |
| Max Operating Temperature | Up to 550°C (1020°F) |
| Tensile Strength | ≥ 480 MPa (min) |
| Yield Strength (0.2%) | ≥ 170 MPa (min) |
| Elongation | ≥ 35% |
| Hardness | Rb 75 max |
| Corrosion Resistance | Excellent in seawater, acids (hydrofluoric, sulfuric) |
| Applications | Heat exchangers, condensers, offshore, marine, chemical |
| Delivery Condition | Annealed / Solution annealed and tested |
🏭 Industry & Application
- ✅ Monel 400 K400 Fin tubes for Medical Industry
- ✅ Monel 400 K400 Fin tubes for Chemical Processing
- ✅ Monel 400 K400 Fin tubes for Fin Lines
- ✅ Monel 400 K400 Fin tubes for Gas & Liquid Flow
- ✅ Monel 400 K400 Fin tubes for Heat Exchangers
❓ Frequently Asked Questions (FAQs)
Q1:What is Monel 400 or K400?
Monel 400 (UNS N04400) or K400 is a nickel-copper alloy known for its excellent corrosion resistance, particularly in marine and chemical environments. The terms “Monel 400” and “K400” are often used interchangeably, referring to the same alloy grade.
Q2:What are Monel 400 finned tubes used for?
These tubes are primarily used in heat exchangers, condensers, coolers, and evaporators in industries such as oil & gas, marine engineering, power generation, and chemical processing. Their finned design enhances heat transfer efficiency, especially in harsh or corrosive conditions.
Q3:What makes Monel 400 suitable for fin tube applications?
Monel 400 combines high mechanical strength, excellent thermal conductivity, and superior corrosion resistance—especially against seawater, acids, and alkalis. When formed into finned tubes, it allows for efficient heat exchange while withstanding extreme environments and temperatures.
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