EN10217-7 1.4404 Extruded Finned Tube with Al1060 Fins for Refinery Air Coolers
EN10217-7 1.4404 Extrudded Finned Tube with Al1060 Fins for Refinery Air Coolers
EN 10217-7 1.4404 Extruded Finned Tube with Al1060 Fins is a high-performance, bimetallic tube used in heat exchange equipment. It combines a strong, corrosion-resistant stainless steel core with highly conductive aluminum fins to maximize heat transfer efficiency. It is designed for pressure-bearing and corrosive service in heat exchangers, air coolers, and process equipment.
Key Material Properties
1.4404 Base Tube (Solution-Annealed)
Chemical Composition (EN 10217-7, 1.4404 / X2CrNiMo17-12-2)
| Element | Min | Max |
| C | — | 0.03 |
| Si | — | 1.00 |
| Mn | — | 2.00 |
| P | — | 0.045 |
| S | — | 0.015 |
| Cr | 16.5 | 18.5 |
| Ni | 10.0 | 13.0 |
| Mo | 2.0 | 2.5 |
| N | — | 0.11 |
| Others | — | ≤0.50 total |
Mechanical Properties (Solution-annealed, EN 10217-7, room temperature)
| Property | Value |
| Yield strength (Rp0.2) | ≥ 220 MPa |
| Tensile strength (Rm) | 490–690 MPa |
| Elongation (A5) | ≥ 40 % |
| Hardness (HB) | ≤ 187 |
2. Aluminum Extruded Fins
| Fin Material | Al 1060 (1060 Aluminum) | High-purity aluminum (≥99.6% Al); excellent thermal conductivity (~237 W/m·K); good formability and corrosion resistance. |
| Fin Type | Extruded (Integral) | Fins are cold-plastically deformed from an aluminum sleeve bonded metallurgically to the base tube; no thermal resistance at the interface; vibration-resistant. |
The strong extruded bond ensures long-term reliability in demanding industrial environments, which is why it's commonly used in applications like air-cooled heat exchangers, power plant coolers, and HVAC systems.
Based on the information gathered, the EN10217-7 1.4404 Extruded Finned Tube with Al1060 Fins is primarily used in different types of heat exchange equipment, particularly in demanding industrial environments where heat needs to be transferred between a fluid and air. Its design, which combines a corrosion-resistant stainless steel core with highly conductive aluminum fins, makes it suitable for a wide range of specific applications across several key industries.
| Industry | Common Applications | Key Requirements Addressed |
| Oil & Gas and Petrochemical | Air-cooled heat exchangers (ACHEs) for process cooling, gas coolers, refinery air coolers, charge air coolers for compressors | High corrosion resistance to process fluids, durable bond to withstand vibration, efficient heat rejection |
| Power Generation | Turbine jacket water cooling, lube oil cooling, compressed air intercoolers and aftercoolers, air-cooled steam condensers (ACSC) | Reliable, long-lasting performance in continuous operation, efficient heat transfer for cooling critical machinery |
| Industrial Manufacturing | Hydraulic oil cooling for large machinery (e.g., injection molding, stamping), heat recovery systems from ovens or furnaces, industrial radiators and coils | Enhanced thermal efficiency for energy recovery, robust construction for demanding shop floor conditions |
| HVAC & Refrigeration | Condensers and evaporators in large commercial/industrial chillers, heat pump coils, cooling/evaporator coils, generator hydrogen coolers | High thermal performance for energy-efficient climate control, lightweight and corrosion-resistant fin material |
Why This Tube is Suited for These Applications
- Bimetallic Efficiency: It combines the high-pressure strength and superior corrosion resistance of the 1.4404 (316L) stainless steel core with the excellent thermal conductivity of the Al1060 aluminum fins. This allows it to handle aggressive fluids inside while efficiently transferring heat to the air outside.
- Extruded Bond Integrity: The extrusion process creates a strong, permanent, metallurgical bond between the steel tube and the aluminum fins. This eliminates any air gap that would hinder heat transfer and makes the tube highly resistant to vibration and thermal stress, ensuring long-term reliability in demanding applications.
- Corrosion Resistance: The 1.4404 stainless steel core is specifically chosen for its enhanced resistance to chlorides and industrial chemicals, making it ideal for the challenging environments found in petrochemical and marine applications. The aluminum fins also form a protective oxide layer, offering good resistance to atmospheric corrosion.
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