This could be useful in heat exchangers and rocket engine thrust chambers. I imagine this has very high thermal conductivity compared to steels. The thermal co

This could be useful in heat exchangers and rocket engine thrust chambers. I imagine this has very high thermal conductivity compared to steels. The thermal conductivity of copper is about 20x that of stainless steel. So, you can make the walls of the passages an order of magnitude thicker, increasing their strength proportionally.