EN10217-7 1.4307 Extruded Finned Tube Al1060 Fins for HVAC Condenser or Evaporator

EN10217-7 1.4307 Extruded Finned Tube Al1060 Fins for HVAC Condenser or Evaporator

This extruded bimetallic finned tube combines a corrosion-resistant stainless steel core with a high-purity aluminum fin layer, engineered for applications demanding both mechanical strength under pressure and superior thermal dissipation. The construction consists of a seamless or welded inner tube manufactured to EN 10217-7, using grade 1.4307 (304L) stainless steel, over which an Al1060 aluminum sleeve is mechanically cold-formed into integral spiral fins.

The extrusion process creates a monolithic fin structure with consistent metallurgical contact across the entire tube length. Unlike mechanically attached fins, this method eliminates interface resistance and provides long-term stability under thermal cycling.

1. Base Tube:

EN 10217-7 1.4307 (X2CrNi18-9) Chemical Composition (wt.%)

EN 10217-7 1.4307 Mechanical Properties (Room Temperature)

EN 10217-7 1.4307 (low-carbon austenitic stainless steel) inner tube offers resistance to oxidation, pitting, and stress corrosion, particularly in chloride-containing or high-temperature process streams.

2. Fins:

Fins: Al1060 (Pure Aluminum)

Alloy: Al1060 (≥99.6% Al) – high thermal conductivity, good formability, natural corrosion resistance

Manufacturing: Extrusion (bimetallic extrusion)

• Slip an Al1060 sleeve (muff) over the base tube
• Cold-extrude the sleeve into continuous spiral fins via dies
• Forms a metallurgical bond between fin and tube – near-zero contact resistance

3. Key Advantages of this Combination: EN10217-7 1.4307 welded tube+Al1060 Fins

• Excellent heat transfer: Al fins + tight bond → high efficiency
• Pressure-rated base tube: EN 10217-7 for safe pressure service
• Corrosion resistance: 304L tube + Al fin protection
• Mechanical strength: Fins are rigid, resistant to vibration/cleaning
• Temperature range: Typically -40°C to ~150°C (airside; higher with design limits)

The applications of EN10217-7 1.4307 Extruded Finned Tubes with Al1060 Fins:

Extruded finned tubes made from EN 10217-7 1.4307 (304L) stainless steel base tube and high-purity Al1060 aluminum fins are high-performance heat transfer components designed for reliable operation in moderate-pressure and corrosion-sensitive environments.

Thanks to their strong metallurgical bonding, excellent thermal conductivity, and durable mechanical structure, these fin tubes are widely applied in:

• Air-cooled heat exchangers & dry coolersUsed in industrial process cooling, compressor stations, and power-related cooling systems where efficient air-side heat dissipation is required.
• Shell-and-tube heat exchangersIdeal for liquid-to-gas or gas-to-gas heat exchange in process industries, offering stable performance under pressure and mild corrosive conditions.
• HVAC, refrigeration condensers and evaporatorsSuitable for building cooling units, industrial refrigeration systems, and medium-temperature heat pump modules.
• Waste heat recovery and process heating equipmentApplied to recover low-grade waste heat from exhaust air, flue gas, or process fluids to improve overall energy efficiency.
• Food, beverage and general processing equipmentThe 1.4307 (304L) stainless tube ensures good corrosion resistance and cleanability, meeting hygienic and mild chemical working conditions.
• General industrial cooling and heating systemsUsed in air dryers, water heating units, thermal oil systems, and other equipment requiring long service life and stable heat exchange performance.

This type of finned tube combines the pressure resistance of EN 10217-7 stainless steel tube, the corrosion resistance of 1.4307 material, and the high thermal efficiency of extruded Al1060 fins, making it a cost-effective solution for many general and industrial heat exchange scenarios.