Which aluminum alloy has better thermal conductivity, 6061 or 6063?

6061 and 6063 aluminum alloys are both commonly used materials, and they have certain differences in mechanical properties and processability, but their thermal conductivity is quite similar.

- 6061 aluminum alloy: This alloy has higher strength and good corrosion resistance, making it suitable for structural components requiring higher strength and durability. Its thermal conductivity is approximately 167 W/m·K.

- 6063 aluminum alloy: This alloy has better extrudability and corrosion resistance, typically used in architectural profiles and heat sinks where good surface finish is important. The thermal conductivity of 6063 is slightly higher, around 201 W/m·K.

Conclusion: In terms of thermal conductivity, 6063 aluminum alloy is slightly better than 6061 because of its higher thermal conductivity, making it more efficient at transferring heat. Therefore, if heat dissipation is the main concern, 6063 might be the better choice.