ASTM A179 Extruded Finned Tubes are high-performance heat transfer tubes manufactured from ASTM A179 seamless low-carbon steel tubes with an external aluminum fin sleeve mechanically extruded onto the base tube. During the extrusion process, the aluminum sleeve is plastically deformed under high pressure, forming integral fins while creating an exceptionally tight bond between the fin material and the tube surface.

Compared with welded finned tubes and embedded fin tubes, extruded finned tubes provide superior mechanical strength, enhanced environmental protection of the base tube, and excellent resistance to atmospheric corrosion. The continuous aluminum sleeve completely covers the steel tube surface, minimizing exposure to moisture and corrosive environments.

These finned tubes are widely used in air-cooled heat exchangers, economizers, waste heat recovery systems, HVAC equipment, condensers, radiators, and process cooling applications where high heat transfer efficiency and long operating life are required.

ASTM A179 Base Tube Specification

Standard

ASTM A179 / ASME SA179

Product Type

Cold Drawn Seamless Low-Carbon Steel Heat Exchanger Tube

Typical Applications

Heat exchangers
Condensers
Economizers
Air preheaters
Boiler auxiliary systems
Process cooling equipment

Chemical Composition of ASTM A179

Element	Composition (%)
Carbon (C)	≤ 0.18
Manganese (Mn)	0.27 – 0.63
Phosphorus (P)	≤ 0.035
Sulfur (S)	≤ 0.035

The low carbon content provides excellent cold-forming capability, good weldability, and reliable thermal conductivity for heat transfer applications.

Mechanical Properties of ASTM A179

Property	Value
Tensile Strength	≥ 325 MPa (47 ksi)
Yield Strength	≥ 180 MPa (26 ksi)
Elongation	≥ 35%
Hardness	Typically ≤ 72 HRB

These mechanical properties make ASTM A179 an economical and dependable material for medium-temperature heat transfer equipment.

Extruded Fin Construction

Base Tube Material

ASTM A179 Carbon Steel
Other materials available upon request

Fin Material

Aluminum 1050
Aluminum 1060
Aluminum 1100
Aluminum 6063

Manufacturing Process

Aluminum sleeve is positioned over the ASTM A179 tube.
Multiple rolling dies apply high radial pressure.
Aluminum is extruded outward to form fins.
The remaining aluminum layer completely encapsulates the steel tube.

This process creates a strong mechanical bond while protecting the base tube from external corrosion.

Typical Dimensions

Base Tube Size Range

Outside Diameter	Wall Thickness
15.88 mm (5/8")	1.2 – 3.0 mm
19.05 mm (3/4")	1.2 – 4.0 mm
25.40 mm (1")	1.5 – 5.0 mm
31.75 mm (1-1/4")	1.5 – 5.0 mm
38.10 mm (1-1/2")	2.0 – 5.0 mm
50.80 mm (2")	2.0 – 6.0 mm

Fin Parameters

Item	Typical Range
Fin Height	8 – 16 mm
Fin Thickness	0.3 – 0.5 mm
Fin Density	8 – 13 FPI
Fin Pitch	2.0 – 3.2 mm

Ratings & Review

Overall Rating

4.7

Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings

5 stars

67%

4 stars

33%

3 stars

2 stars

1 stars

All Reviews

Berrada

Morocco Jan 30.2026

Helpful (2)

We're dealing with aggressive fluids on the tube side. So far, no pitting or issues.

Marek

Poland Sep 5.2025

Helpful (2)

Heat transfer has been consistent since day one. Our outlet temperatures are steady, and the exchanger is performing exactly as we expected.

Rajesh Kumar

India Apr 19.2025

Helpful (3)

Cost and reliability are key for Indian refineries. We installed these fin tubes in Mumbai’s cooling towers, achieving 16% energy savings versus local suppliers. ASTM A213 T11 compliance ensured no failures during monsoon humidity (90%+ RH), and the low price saved $8K upfront.

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Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

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Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

products details

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube