Forged Metal is one of the most important foundational items in Celestial Frontier. Forged Metal is a basic building block of many types of components (Structural, Building, and Mechanical) and is the core mechanism of multiple industries.
Materials that have high strength are great candidates for the Construction Industry, but it is also important to consider the metal's mass. A higher Strength value on the metal can be insignificant if the density of the metal is so high that it can barely support it's own mass.
Consider using strong materials with low mass when building on Ships and try to find cheaper, more easily extracted metals for building on Stations where there are minimal forces at work.
Some metals have extremely low resistivity and can become great conductors. Lower resistivity is useful for Cables as it can allow for significantly more powerful Electric Motors.