Tables 1–7 indicate numeric values for various physical properties of materials often used in process equipment and plant engineering. The dependence on the temperature of these numeric values is indicated. Table 1 shows these properties for pure metals. Table 2 provides an overview of alloys, which can be categorized into different groups by their properties and their alloying constituents. Here, the group of steels is the most significant, which have, therefore, been subdivided according to their respective material properties. As well as two representative gray cast iron materials, some nonferrous materials have been listed. Out of these, the nickel alloys due to their acid resistance and the aluminum alloys are frequently employed in process equipment and plant engineering.