Aluminum Extruded Finned Tubes

Two Precision Technologies for Every Cooling Application

As a leading aluminium extruded fin tube manufacturer with 15+ years of experience, SANE Industry offers two distinct aluminum extrusion technologies to meet your exact performance requirements:

One-Piece Monolithic Aluminum Extruded Finned Tube: 100% aluminum construction for lightweight, cost-effective indoor cooling, the entire tube — core and fins — is a single piece of extruded aluminum
Bimetallic Aluminum Extruded Finned Tube: Aluminum fins extruded over steel, copper or stainless steel base tubes for enhanced strength and corrosion resistance

Whether you need lightweight tubes for large-scale HVAC projects or durable tubes for industrial cooling systems, our extruded aluminum fin tubes deliver unmatched thermal performance and long-term reliability.

ISO 9001:2015 Certified

All manufacturing and testing in our factory are strictly in accordance with ISO standards.

Rich Industry Experience

Specializing in the production of finned tubes for over 15 years, serving more than 100 clients worldwide.

The Strictest Quality Control

From raw materials to the final product, every stage is strictly controlled for quality. TÜV, SGS, BV inspection available.

Full Material Traceability

We ensure full traceability via EN 10204 3.1 or 3.2 mill test certificates and complete records throughout the entire process.

What Are Aluminum Extruded Finned Tubes?

An aluminum extruded finned tube is not assembled — it’s formed. A thick-walled aluminum tube, or an aluminum sleeve over an inner tube, passes through rotating extrusion dies. The dies progressively lift and shape the aluminum into fins that grow directly out of the tube surface.

The critical distinction: the fin is the tube. There is no weld bead connecting a separate fin strip. There is no tension wrap holding a fin in place. There is no groove with a fin foot embedded in it. The fin and the outer surface are one continuous piece of aluminum.

SANE Industry produces extruded aluminum fin tubes in two constructions. Monometallic aluminum extruded finned tube — the entire tube is aluminum, for low-pressure applications where thermal conductivity matters most. Bimetallic aluminum extruded finned tube — an aluminum fin layer extruded over a carbon steel, stainless steel, or copper inner tube, for applications where the inner tube handles pressure and the aluminum handles heat transfer and external corrosion.

Anatomy of an Aluminum Extruded Finned Tube

An aluminum extruded finned tube from SANE Industry consists of either one material or two, depending on the construction:

Monolithic Aluminum Extruded Finned Tube (All-Aluminum): The entire tube — core and fins — is a single piece of extruded aluminum, typically grade 1050, 1060, or 6063. The inner bore carries the fluid. The outer surface forms the fins. There is no interface anywhere. This is the highest possible thermal conductivity configuration for an extruded tube, used where operating pressures are moderate and the process fluid is compatible with aluminum.
Bimetallic Aluminum Extruded Finned Tube (Aluminum Outer + Inner Tube): An aluminum sleeve — again 1050, 1060, 3003, 5052, or 6063 — is extruded over a seamless inner tube of carbon steel, stainless steel, or copper alloy. The aluminum forms the fins and encases the inner tube. The inner tube handles pressure and resists whatever the process fluid demands. This is the standard configuration for air-cooled heat exchangers in power, petrochemical, and offshore service.

In both constructions, the fin root is not a joint. It’s a transition — a continuous gradient of aluminum from the tube wall into the fin profile. That’s what makes an extruded aluminum fin tube fundamentally different from a welded or wrapped alternative.

Monolithic vs. Bimetallic Aluminum Extruded Finned Tubes

Parameter	Monolithic Aluminum Extruded Finned Tube	Bimetallic Aluminum Extruded Finned Tubes
Construction	Single piece extruded aluminum	Aluminum sleeve extruded over base tube
Base Tube Materials	Aluminum only	Carbon steel, stainless steel, copper
Weight	Lightest (100% aluminum)	Medium (heavier than monolithic)
Contact Resistance	Absolute zero	Zero
Max Operating Temp	200°C (390°F)	300°C (570°F)
Internal Medium Corrosion Resistance	Generally (only resistant to neutral and weak corrosive media)	Excellent (the base tube can be selected according to the medium)
Thermal Efficiency	Highest	Excellent
Cost	Lowest	Medium
Best For	Indoor HVAC, refrigeration, dry environments	Industrial cooling, outdoor applications, high-pressure systems

Why Engineers Choose Aluminum Extruded Over Welded or Wrapped Finned Tubes

1. Zero Contact Resistance, Permanently

The fin is the outer tube. Heat conducts from the tube wall into the fin without crossing a weld interface, a mechanical wrap seam, or a groove contact. This extruded aluminum fin tube maintains its full thermal conductance for the life of the exchanger — no degradation, no re-tightening, no inspection for loose fins.

2. Superior Thermal Performance

The integral fin design creates 100% metal-to-metal contact, eliminating thermal contact resistance. This results in 15-20% higher heat transfer efficiency than wrapped or welded aluminum fin tubes.

3. Exceptional Mechanical Strength

Extruded fins are an integral part of the tube structure, making them highly resistant to damage from vibration, pressure washing, and handling. Fins will never bend, break, or detach under normal operating conditions.

4. Excellent Corrosion Resistance, Extending The Service Life of Equipment

The extruded aluminum fin tubes have no welds or gaps, fundamentally eliminating the weakest links in traditional finned tubes where corrosion is most likely to occur (weld seams, contact gaps between fins and the base tube). Combined with pure aluminum (1060) or anti-corrosion aluminum alloys (6063), as well as optional surface treatments, they can effectively resist corrosion.

How SANE Industry Produces Aluminum Extruded Finned Tubes

The production of an extruded aluminum fin tube is a cold-forming process. No heat is applied. The aluminum flows under mechanical pressure alone.

Monometallic extruded aluminum fin tube Production:
A thick-walled aluminum tube is fed directly into the extrusion station. Rotating dies engage the outer surface, progressively displacing aluminum upward to form fins. The tube wall becomes the fin root. The fins are the same piece of metal as the tube.

Bimetallic extruded aluminum fin tube Production:
A seamless inner tube — carbon steel, stainless steel, or copper alloy — is inserted into a thick-walled aluminum sleeve. The assembly enters the extrusion station. The rotating dies work only the aluminum, lifting and shaping it into fins while the inner tube remains dimensionally stable. The aluminum flows under pressure, conforming tightly to the inner tube surface.

In both cases, the extrusion is continuous along the tube length. The tube rotates and advances through the die set at a controlled speed. Fin height, thickness, and pitch are determined by the die geometry and feed rate — all CNC-controlled on our lines.

After extrusion, each extruded aluminum fin tube is cut to length, measured, and visually inspected.

We have total twelve extruded aluminum fin tube production lines. Monthly production capacity of 150,000 meters.

Extruded Aluminum Fin Tube Technical Specifications

The technical parameters of the extruded aluminum fin tubes are highly customizable. The table below shows our common production capacities:

Parameter	Bimetallic Extruded Aluminum Fin Tube	Monometallic Extruded Aluminum Fin Tube
Base Tube OD	19 to 60.3 mm	19 to 60.3 mm
Base Tube Wall Thickness	0.5 to 4 mm	0.5 to 4 mm
Base Tube Length	≤32,000 mm	≤32,000 mm
Base Tube Material	Carbon steel (ASTM A179, A192, A106 Gr. B, etc.) , stainless steel (304/316L, etc.), alloy steel, copper (C12200), Cu-Ni (C70600), titanium	Aluminum (same as fins)
Fin Pitch	2.1 to 10 mm	2.1 to 10 mm
Fin Height	5 to 16 mm	5 to 16 mm
Fin Thickness	0.3 to 1.2 mm	0.3 to 1.2 mm
Fin Material	aluminum (1050, 1060, 6063, etc.)	aluminum (1050, 1060, 6063, etc.)
Fin Type	Solid, serrated	Solid, serrated
Bonding Type	Cold extrusion	Cold extrusion
End Finishes	Plain ends, beveled ends	Plain ends, beveled ends

Where Aluminum Extruded Finned Tubes Deliver Value

1. Bimetallic Extruded Aluminum Fin Tube (95% Market Share)

This is the first choice for the vast majority of industrial heat exchange equipment:

Petrochemical industry: Air coolers, gas coolers and condensers (base tube: Carbon steel SA-106 Gr.B)
Power generation industry: Power plant air cooling systems and boiler economizers (base tube: Carbon steel SA-179)
Metallurgical industry: Waste heat recovery systems and hydraulic oil coolers (base tube: Carbon steel)
Seawater desalination and offshore engineering: Seawater coolers (base tube: Copper-nickel alloy)
Chemical processing industry: Corrosive medium coolers (base tube: Stainless steel 304/316L)

2. Monometallic Extruded Aluminum Fin Tube (5% Market Share)

Primarily used in the following specialized applications:

HVAC industry: Large central air conditioning air-cooled modules and heat pump units (low-pressure, low-temperature, clean media applications)
Automotive industry: Automotive radiators, intercoolers and oil coolers
Aerospace industry: Aircraft air conditioning systems and engine cooling systems
Electronics industry: High-power electronic equipment heat sinks and data center cooling systems
Food and pharmaceutical industry: Clean room air conditioning systems and food drying equipment (where weld-free and impurity-free construction is required)

Monometallic or Bimetallic Extruded Aluminum Fin Tube — How to Choose

Choose Monometallic Extruded Aluminum Fin Tube When:

Operating pressure is below 4MPa
Tube-side media are clean water, air or mildly corrosive substances
Operating temperature is below 300°C
Lightweight construction and exceptionally high heat transfer efficiency are required
Applications in HVAC, automotive, electronics, food and pharmaceutical industries

Choose Bimetallic Extruded Aluminum Fin Tube When:

Operating pressure exceeds 4MPa
Tube-side media are corrosive
Operating temperature exceeds 300°C
Long-length tubes (over 6 meters) are required
Applications in heavy industries such as petroleum, chemical processing, power generation and metallurgy

Not sure which construction fits your application? Send us your operating conditions. Our engineers will recommend the right extruded aluminum fin tube configuration based on your fluid, pressure, and environment.

Quality Guarantee — How We Verify Every Extruded Aluminum Fin Tube

As an ISO 9001:2015 certified aluminium extruded fin tube manufacturer, we implement rigorous quality control measures at every stage of production:

1: Raw Material Verification

Every incoming lot of steel tubes, aluminum tubes is checked for alloy chemistry, wall thickness, and surface condition against the mill certificate per ISO 9001.

2: Aluminum Sleeve Inspection (for bimetallic only )

The aluminum that will become the fins arrives as thick-walled tube stock. We check alloy chemistry, wall thickness, concentricity, or whatever your order requires.

3: Extrusion Process Monitoring

Fin height, pitch, thickness and finned length are measured on at least one tube in ten throughout the production run.

4: Post-Extrusion Dimensional Check

After extrusion and cutting to length, every single tube goes through a full dimensional check. We measure tube OD, wall thickness, overall length, fin height, fin pitch, fin thickness, finned length and Straightness.

5: Surface Inspection

Visual inspection of the aluminum surface for cracks, folds, scoring, or discoloration under shop lighting.

6: Complete Traceability

EN 10204 3.1 certificate linking aluminum heat numbers, inner tube heat numbers, inspection records, and test results. 3.2 available with SGS, Bureau Veritas, or TÜV witness.

Frequently Asked Questions

Q: What is the difference between monolithic and bimetallic aluminum extruded finned tubes?

A: Monolithic tubes are made from a single piece of aluminum, while bimetallic tubes consist of an aluminum sleeve extruded over a base tube of steel, copper or stainless steel. Monolithic tubes are lighter and cheaper, while bimetallic tubes offer higher pressure ratings and better corrosion resistance.

Q: What aluminum grades do you use?

A: 1050 and 1060 for standard atmospheric service, 3003 for higher strength and coastal environments, 5052 for marine and severe chloride exposure, and 6063 for applications requiring higher mechanical strength in the fins.

Q: How does an extruded aluminum fin tube compare to an aluminum welded fin tube?

A: An extruded aluminum fin tube has zero contact resistance — the fin is the tube. A welded tube has a metallurgical bond that handles higher temperatures. Extruded excels in corrosion protection below 350°C. Welded excels above 400°C.

Q: What is the maximum operating temperature of extruded aluminum fin tubes?

A: For 1060 pure aluminum fins, the recommended long-term continuous service temperature is ≤ 280°C, with a short-term peak limit of 300°C. For 6061 aluminum alloy fins, the long-term working temperature should not exceed 280°C to avoid irreversible over-aging and strength loss. Aluminum fins will soften and deform permanently if exposed to temperatures above these limits for extended periods.

Q: Why are extruded aluminum fin tubes more expensive than wrapped fin tubes?

A: Extruded fin tubes use a one-piece forming process that requires significant equipment investment and has lower raw material utilization. However, their service life is 3-4 times that of wrapped fin tubes, resulting in much lower long-term operating costs.

Q: Can aluminum extruded finned tubes be used in seawater environments?

A: Yes. Select copper-nickel alloy or titanium alloy for the base tubes, and 3003 aluminum alloy for the fins with anodizing treatment. This combination is fully suitable for seawater applications.

Q: What is your minimum order quantity (MOQ) for extruded aluminum fin tubes?

A: 500 meters for standard specifications, and 1000 meters for custom or special specifications.

Q: What is your lead time for extruded aluminum fin tubes?

A: For common materials and standard specs, you’re generally looking at 50 days. Special alloy base tubes — titanium, nickel-based — require extra procurement time, usually around 60 days. As a leading aluminium extruded fin tube manufacturer, we maintain a large inventory of standard sizes to ensure fast delivery worldwide.

Q: What if fins get deformed during transportation?

A: We use export-specific wooden crates with multiple internal supports to protect the tubes. If a small number of fins are deformed upon receipt, we will provide special repair tools free of charge.

Q: What information do you need to quote aluminum extruded finned tubes?

A: Construction type (monometallic or bimetallic), inner tube material and OD, wall thickness, tube length, aluminum grade, fin height, fin pitch, fin thickness, and quantity. Send what you have — we’ll fill in the gaps.

Request a Quote — Aluminum Extruded Finned Tubes

Direct Contact

From a single prototype tube to a full air-cooled condenser bundle, SANE Industry has the extrusion capacity and the engineering support to deliver your aluminum extruded finned tubes. Send us your specifications or tell us about your application. An applications engineer will review your inquiry and return a complete quotation within one business day.

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