ASTM A106 Gr.B Cu-T2 Embedded Fin Tube with Thermal Shock Resistance for 350–400°C Applications

The ASTM A106 Gr.B Cu-T2 embedded fin tube combines the structural strength of carbon steel tubes with the high thermal conductivity of copper, delivering excellent heat transfer performance, superior thermal shock resistance, and long-term operational reliability in high-temperature environments of 350–400°C. Its unique embedded fin structure eliminates the risk of fin detachment commonly associated with traditional high-frequency welded fin tubes, making it particularly suitable for industrial equipment subject to significant temperature fluctuations and demanding heat transfer requirements. This material combination offers an optimal balance of cost-effectiveness and high performance, making it a preferred solution in medium-to-high temperature heat exchange applications.

1.Excellent Thermal Conductivity

• The fins are made of copper (Cu-T2 pure copper), which has a high thermal conductivity of approximately 390 W/(m·K), significantly higher than that of ordinary carbon steel fins, greatly enhancing overall heat transfer efficiency.
• The copper fins are mechanically embedded into the carbon steel tube base, ensuring tight contact with low thermal resistance and more uniform heat transfer.

2.Outstanding Thermal Shock Resistance

• Performs reliably under frequent start-stop cycles or rapid temperature fluctuations (e.g., in heating furnaces with intermittent operation), with minimal risk of cracking or fin detachment at material interfaces.
• The ASTM A106 Gr.B carbon steel tube offers good ductility and toughness, while the high thermal conductivity of Cu-T2 copper fins enables rapid temperature equalization, reducing localized thermal stress and effectively resisting thermal shock.

3.High Structural Stability

• The embedded fin design uses precision rolling technology to press copper fins into grooves on the steel tube surface, achieving strong mechanical interlocking without welding—eliminating potential weld failure risks.
• Compact structure with adjustable fin spacing to meet various heat transfer requirements for different media.

4.Good Corrosion Resistance

• Cu-T2 pure copper exhibits excellent oxidation and sulfidation resistance in medium-to-high temperature dry environments, making it suitable for flue gas containing sulfur compounds.
• The inner wall of the carbon steel tube can be treated with anti-corrosion coatings or plating depending on the working medium, extending service life.

Remainder consists of silver (Ag) with total impurities ≤0.10%

• Excellent electrical and thermal conductivity
• Superior corrosion resistance
• Excellent machinability
• Suitable for welding and brazing
• Minimal impurities that could reduce conductivity