SA179 SA192 Carbon Steel Aluminum Extruded Fin Tubes: Technical Overview

Carbon steel aluminum extruded fin tube is smooth, burr-free, wrinkle-free, easy to clean, not easy to accumulate dust and scale, the cross section of the extruded fin is trapezoidal, so the fin strength is high and has a considerable extended heat transfer surface.

Compared with ordinary wound fin tubes, the K value of the former is 795.5j/kg.℃ and the K value of the latter is 290j/kg.℃ at the same wind speed of 10m/s. Under the same working conditions, the double-row tube resistance of the former is 60pa, while that of the latter is 114pa.

1. What is SA179 SA192 Carbon Steel Aluminum Extruded Fin Tube?

Carbon steel aluminum extruded finned tubes are composite heat exchange elements consisting of a carbon steel base tube and integrally bonded aluminum fins. The fins are mechanically extruded from aluminum sleeves, creating a seamless thermal connection between the two materials. This combination leverages the strength of carbon steel and the superior thermal conductivity of aluminum.

2.ASTM A179 Carbon Steel Aluminum Extruded Fin Tube Materials and Production Range

Carbon Steel-Aluminum Extruded Finned Tube Specifications

This table presents the standard manufacturing parameters for extruded finned tubes where:

• Carbon steel base tubes conform to ASTM pressure vessel standards (A106 for seamless pipe, A179 for heat exchanger tubes)
• Aluminum fins utilize commercial-grade alloys (1100 for purity, 3003 for manganese-enhanced corrosion resistance)
• All dimensional ranges reflect typical industrial production capabilities for heat transfer applications

Note: The bimetal construction provides superior thermal conductivity (aluminum fins) with structural integrity (carbon steel core), making these tubes suitable for temperatures up to 280°C in heat exchangers, boilers, and waste heat recovery systems.

3.Carbon Steel Aluminum Extruded Fin Tube Manufacturing Process

1. Tube Preparation: Carbon steel tubes are cleaned and degreased
2. Aluminum Sleeving: Aluminum sleeves are fitted over steel tubes
3. Extrusion: Hydraulic pressure forces dies along the tube, extruding fins
4. Annealing: Heat treatment relieves internal stresses
5. Finishing: Surface treatment and dimensional verification

4.SA179 SA192 Carbon Steel Aluminum Extruded Fin Tube Working Principle

The composite tube operates through:

• High thermal conductivity aluminum fins increase surface area by 5-10x
• Carbon steel maintains structural integrity under pressure
• The metallurgical bond minimizes thermal contact resistance
• Fins create turbulent airflow for enhanced convection

5.Carbon Steel Aluminum Extruded Fin Tube Key Characteristics

• Thermal Efficiency: 15-30% better than wound fin designs
• Pressure Resistance: Up to 4MPa working pressure
• Corrosion Resistance: Aluminum fins protect steel core
• Mechanical Strength: Withstands vibration and thermal cycling
• Compact Design: High surface-area-to-volume ratio

6.Carbon Steel Aluminum Extruded Fin Tube Application Cases

Case 1: Power Plant Air Preheater

Case 2: Petrochemical Waste Heat Recovery