**3. Fluid properties for thermal-hydroforming**

Fresh water has a very high level of thermal conductance. It is 100% better than glycerol and 350% better than machine oil. However, in order to be used at high temperature water must be pressurized to prevent boiling. In this design configuration pressure is applied as a part of the process. As a result, at 300 psi water can be used at temperatures of approximately 400°F (**Figures 2** and **3**).
