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| Brand Name: | YUHONG |
| MOQ: | 200-500KGS |
| Price: | Negotiable |
| Payment Terms: | L/C,T/T,AT SIGHT |
| Supply Ability: | According to Clients' requirements |
The ASTM A192 extruded fin tube with AL1060 aluminum fins is a high-performance heat transfer solution designed for applications requiring superior thermal efficiency and durable mechanical bonding. This composite tube excels in low to moderate temperature services, offering an optimal solution where heat transfer and structural integrity are top priorities.
The base material of this tube is ASTM A192, a seamless low-carbon steel, specially engineered for high-pressure boiler services. Known for its excellent thermal conductivity and good strength at moderate temperatures, it is commonly used in water walls, economizers, and other boiler components where heat absorption from combustion gases is critical. The low carbon content of ASTM A192 ensures weldability and formability, which makes it suitable for various industrial applications.
Typically, the temperature limit for this composite tube is 200°C (392°F), as higher temperatures could soften the aluminum fins. However, it provides exceptional heat transfer performance in air cooling and gas cooling applications, making it ideal for air-cooled heat exchangers (ACHEs), compressor coolers, and other systems where maximizing thermal efficiency in a compact form factor is essential.
1. Base Tube: ASTM A192 Chemical & Mechanical Properties
Chemical Composition:
| Element | C (max) | Mn | P (max) | S (max) | Si (min) |
| Range | 0.06-0.18 | 0.27-0.63 | 0.035 | 0.035 | 0.10 |
Mechanical Properties (Base Tube):
| Tensile Strength | Yield Strength | Elongation |
| ≥ 325 MPa (47 ksi) | ≥ 180 MPa (26 ksi) | ≥ 35% |
2. Fin Material: Aluminum 1060 (AL1060)
● Exceptional Thermal Conductivity (~230 W/m·K): Ensures efficient heat dissipation.
● Lightweight: Significantly reduces the overall mass of heat exchangers.
● Atmospheric Corrosion Resistance: Protected by a natural oxide layer.
● Excellent Extrudability: Ideal for high-pressure forming processes.
ASTM A192 vs. ASTM A210 A1
● Composition & Application: ASTM A192 is a low-carbon steel optimized for high-pressure boiler tubes where thermal conductivity is paramount. ASTM A210 A1, with higher carbon content, offers greater tensile strength and is used in general heat exchanger applications. While A192 is ideal for boiler environments, A210 A1 is more widely used across industrial sectors.
● Temperature Range: Both materials are limited by the aluminum fins' temperature capacity (~200°C max). However, the base materials can tolerate higher temperatures when used without aluminum fins.
● Air-Cooled Heat Exchangers (ACHEs): For cooling process fluids such as water, oils, and gases in refineries, chemical plants, and gas processing facilities.
● Compressed Air Systems: Used in aftercoolers and intercoolers where efficient heat rejection is critical to system performance.
● Power Plant Auxiliary Cooling: For closed-loop cooling systems, lube oil coolers, and other applications where reliable air-side cooling is needed.
● HVAC&R and Industrial Chillers: As condenser coils in large-scale cooling systems.
● Engine & Turbine Jacket Water Coolers: For cooling in diesel generators and industrial engines.
Q1: What is the primary advantage of the extruded fin process?
A1: The main advantage is the creation of a true metallurgical bond between the aluminum fin and the steel tube. This eliminates the thermal resistance found in mechanically attached fins, ensuring maximum heat transfer efficiency and long-term reliability under thermal cycling conditions.
Q2: What is the maximum safe operating temperature for this tube?
A2: The maximum safe operating temperature is dictated by the aluminum fin material, which is typically 200°C (392°F) at the fin root. Exceeding this temperature can soften the aluminum, causing a loss of strength and potential degradation of the bond. The ASTM A192 base tube can handle higher temperatures but is limited by the composite construction.
Q3: How is galvanic corrosion between the aluminum fin and steel tube managed?
A3: The extruded bond line is protected from environmental exposure. For outdoor or corrosive environments, a baked phenolic coating or anodizing can be applied to the entire finned surface to prevent galvanic corrosion by isolating the materials from moisture and electrolytes.
Q4: Can the fin density or height be customized?
A4: Yes, the extrusion process allows for customization of fin height, thickness, and fins per inch (FPI) to meet specific thermal performance and pressure drop requirements.
