Heat Exchangers

High-Strength, High-Thermal-Conductivity Heat Exchanger CC Al-Fe-Ni Alloy Fin Stock

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For Automobile Radiators and Air Conditioning Fin Materials

Picture of High-Strength, High-Thermal-Conductivity Heat Exchanger CC Al-Fe-Ni Alloy Fin Stock

We have developed fin materials created using the continuous casting (CC) rolling method for use in automobile heat exchangers. Compared with fin materials made using the conventional semi-continuous casting method, materials are high in strength and have a high heat transfer rate.


  • To create fin materials that allow walls to be thinner requires that particles be finer and dispersed more densely to increase strength.
  • We have succeeded in raising the heat transfer rate compared with conventional materials by optimally mixing additive elements to increase the heat exchange ratio.
  • Using a fused braze material with high corrosion resistance results in good connections.

Casting Method

Semicontinuous casting method

Fig. Semicontinuous casting method

Continuous casting rolling method

Fig. Continuous casting rolling method
Aluminum is solidified through high-speed cooling, creating finer dispersion particles.

Product Characteristics

Characteristics comparison with conventional products

  Conventional products created using semicontinuous casting method Newly developed CC fin materials using continuous casting rolling method
Metallic structure of fin materials Dispersed particles are bulky Higher strength as result of finely dispersed particles
Joining capabilities (braze adhesion) of tube materials and fin materials
Comparison of conventional materials and CC fin materials after brazing for three minutes at 605°C
Fin materials melt and buckle Good connection